{"id":5405,"date":"2023-05-05T07:37:37","date_gmt":"2023-05-05T07:37:37","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=5405"},"modified":"2023-05-18T08:27:03","modified_gmt":"2023-05-18T08:27:03","slug":"lap-trinh-oop-trong-php","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/","title":{"rendered":"L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec? Nh\u1eefng th\u00f4ng tin newbie c\u1ea7n bi\u1ebft"},"content":{"rendered":"\n<p>L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh hi\u1ec7n nay, bao g\u1ed3m c\u1ea3 PHP. V\u1eady, <strong><a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/\" target=\"_blank\" rel=\"noreferrer noopener\">l\u1eadp tr\u00ecnh OOP trong PHP<\/a><\/strong> l\u00e0 g\u00ec? H\u00e3y c\u00f9ng <a href=\"https:\/\/topviecit.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopviecIT<\/strong><\/a> t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 kh\u00e1i ni\u1ec7m n\u00e0y trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y nh\u00e9.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Lap_trinh_OOP_trong_PHP_la_gi\" title=\"L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?\">L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#PHP_la_gi\" title=\"PHP l\u00e0 g\u00ec?\">PHP l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Lap_trinh_huong_doi_tuong_%E2%80%93_OOP_la_gi\" title=\"L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng &#8211; OOP l\u00e0 g\u00ec?\">L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng &#8211; OOP l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Lap_trinh_OOP_trong_PHP_la_gi-2\" title=\"L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?\">L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Cac_khai_niem_can_biet_ve_lap_trinh_OOP_trong_PHP\" title=\"C\u00e1c kh\u00e1i ni\u1ec7m c\u1ea7n bi\u1ebft v\u1ec1 l\u1eadp tr\u00ecnh OOP trong PHP\">C\u00e1c kh\u00e1i ni\u1ec7m c\u1ea7n bi\u1ebft v\u1ec1 l\u1eadp tr\u00ecnh OOP trong PHP<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Lop_Class\" title=\"L\u1edbp (Class)\">L\u1edbp (Class)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Thanh_vien_du_lieu_Data_Member\" title=\"Th\u00e0nh vi\u00ean d\u1eef li\u1ec7u (Data Member)\">Th\u00e0nh vi\u00ean d\u1eef li\u1ec7u (Data Member)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Ham_thanh_vien_Member_Functions\" title=\"H\u00e0m th\u00e0nh vi\u00ean (Member Functions)\">H\u00e0m th\u00e0nh vi\u00ean (Member Functions)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Doi_tuong_Object\" title=\"\u0110\u1ed1i t\u01b0\u1ee3ng (Object)\">\u0110\u1ed1i t\u01b0\u1ee3ng (Object)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Nhung_thuoc_tinh_cua_lap_trinh_OOP_trong_PHP\" title=\"Nh\u1eefng thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP\">Nh\u1eefng thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Truu_tuong_hoa_du_lieu_Data_Abstraction\" title=\"Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u (Data Abstraction)\">Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u (Data Abstraction)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Dong_goi_du_lieu_Data_Encapsulation\" title=\"\u0110\u00f3ng g\u00f3i d\u1eef li\u1ec7u (Data Encapsulation)\">\u0110\u00f3ng g\u00f3i d\u1eef li\u1ec7u (Data Encapsulation)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Tinh_Modun_Modularity\" title=\"T\u00ednh Modun (Modularity)\">T\u00ednh Modun (Modularity)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Tinh_ke_thua_Inheritance\" title=\"T\u00ednh k\u1ebf th\u1eeba (Inheritance)\">T\u00ednh k\u1ebf th\u1eeba (Inheritance)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/#Co_hoi_viec_lam_cua_lap_trinh_OOP_PHP\" title=\"C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m c\u1ee7a l\u1eadp tr\u00ecnh OOP PHP\">C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m c\u1ee7a l\u1eadp tr\u00ecnh OOP PHP<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lap_trinh_OOP_trong_PHP_la_gi\"><\/span><strong>L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ec3 hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m l\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec, h\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh PHP l\u00e0 g\u00ec v\u00e0 l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng OOP l\u00e0 nh\u01b0 th\u1ebf n\u00e0o nh\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PHP_la_gi\"><\/span><strong>PHP l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>PHP l\u00e0 m\u1ed9t <a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-lap-trinh-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh<\/strong><\/a><strong> <\/strong>m\u00e3 ngu\u1ed3n m\u1edf ph\u1ed5 bi\u1ebfn, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c \u1ee9ng d\u1ee5ng web. N\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Rasmus Lerdorf v\u00e0o n\u0103m 1994 v\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng c\u00f4ng ngh\u1ec7 ph\u1ed5 bi\u1ebfn nh\u1ea5t tr\u00ean th\u1ebf gi\u1edbi.&nbsp;<\/p>\n\n\n\n<p>PHP \u0111\u1eb7c bi\u1ec7t ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng web v\u00ec n\u00f3 c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u1edbi HTML v\u00e0 CSS \u0111\u1ec3 t\u1ea1o ra c\u00e1c trang web \u0111\u1ed9ng \u0111\u1eb9p m\u1eaft v\u00e0 ch\u1ee9c n\u0103ng. Ngo\u00e0i ra, PHP c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o c\u00e1c \u1ee9ng d\u1ee5ng desktop v\u00e0 mobile. V\u1edbi s\u1ee9c m\u1ea1nh c\u1ee7a m\u00ecnh, PHP c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 ph\u1ee9c t\u1ea1p nh\u01b0 x\u1eed l\u00fd h\u00ecnh \u1ea3nh v\u00e0 t\u1ea1o ra c\u00e1c \u1ee9ng d\u1ee5ng web chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n<p><strong>&gt;&gt;&gt; Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/php-developer-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">PHP Developer l\u00e0 g\u00ec? Nh\u1eefng k\u1ef9 n\u0103ng c\u1ea7n c\u00f3 c\u1ee7a PHP Developer<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-1.jpg\" alt=\"PHP l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh c\u00f3 m\u00e3 ngu\u1ed3n m\u1edf\" class=\"wp-image-5413\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-1.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-1-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-1-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>PHP l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh c\u00f3 m\u00e3 ngu\u1ed3n m\u1edf<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lap_trinh_huong_doi_tuong_%E2%80%93_OOP_la_gi\"><\/span><strong>L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng &#8211; OOP l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-huong-doi-tuong\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/strong><\/a> &#8211; OOP l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh ho\u1eb7c m\u00f4 h\u00ecnh l\u1eadp tr\u00ecnh \u0111\u1eb7t s\u1ef1 quan t\u00e2m ch\u00ednh \u0111\u1ebfn d\u1eef li\u1ec7u v\u00e0 c\u00e1c ch\u1ee9c n\u0103ng li\u00ean quan c\u1ee7a n\u00f3. N\u00f3 s\u1eed d\u1ee5ng kh\u00e1i ni\u1ec7m bao b\u1ecdc d\u1eef li\u1ec7u nh\u01b0 m\u1ed9t th\u1ef1c th\u1ec3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh li\u00ean quan c\u1ee7a n\u00f3 \u0111\u1ec3 cung c\u1ea5p b\u1ea3o m\u1eadt cao h\u01a1n v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 ti\u1ebfp x\u00fac v\u1edbi d\u1eef li\u1ec7u.&nbsp;<\/p>\n\n\n\n<p>V\u00ec kh\u00f4ng c\u00f3 g\u00ec quan tr\u1ecdng h\u01a1n d\u1eef li\u1ec7u, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i v\u00e0 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn tr\u00ean to\u00e0n th\u1ebf gi\u1edbi b\u1edfi c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean. C\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00f4ng h\u1ed7 tr\u1ee3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p v\u00e0 kh\u00e1i ni\u1ec7m c\u1ee7a OOP \u0111ang b\u1ecb l\u1ed7i th\u1eddi, v\u00e0 c\u00e1c ng\u00f4n ng\u1eef \u0111ang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n hi\u1ec7n nay h\u1ed7 tr\u1ee3 OOP v\u00e0 l\u00e0 phi\u00ean b\u1ea3n m\u1edf r\u1ed9ng c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lap_trinh_OOP_trong_PHP_la_gi-2\"><\/span><strong>L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>L\u1eadp tr\u00ecnh OOP trong PHP c\u0169ng tu\u00e2n theo c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Ngh\u0129a l\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c l\u1edbp v\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c t\u1eeb c\u00e1c l\u1edbp kh\u00e1c.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-2.jpg\" alt=\"L\u1eadp tr\u00ecnh OOP trong PHP c\u0169ng tu\u00e2n theo c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng\" class=\"wp-image-5412\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-2.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-2-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-2-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>L\u1eadp tr\u00ecnh OOP trong PHP c\u0169ng tu\u00e2n theo c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cac_khai_niem_can_biet_ve_lap_trinh_OOP_trong_PHP\"><\/span><strong>C\u00e1c kh\u00e1i ni\u1ec7m c\u1ea7n bi\u1ebft v\u1ec1 l\u1eadp tr\u00ecnh OOP trong PHP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi l\u1eadp tr\u00ecnh OOP trong PHP, c\u00f3 m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m quan tr\u1ecdng b\u1ea1n c\u1ea7n ph\u1ea3i hi\u1ec3u r\u00f5 \u0111\u1ec3 c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng web hi\u1ec7u qu\u1ea3. Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lop_Class\"><\/span><strong>L\u1edbp (Class)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>L\u1edbp l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ed5 ch\u1ee9c v\u00e0 qu\u1ea3n l\u00fd c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong ch\u01b0\u01a1ng tr\u00ecnh. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 l\u1edbp bao g\u1ed3m c\u1ea3 h\u00e0nh vi v\u00e0 thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng. Trong PHP, t\u00ean c\u1ee7a l\u1edbp ph\u1ea3i tr\u00f9ng v\u1edbi t\u00ean c\u1ee7a t\u1ec7p ch\u1ee9a ch\u01b0\u01a1ng tr\u00ecnh.&nbsp;<\/p>\n\n\n\n<p>N\u00f3i c\u00e1ch kh\u00e1c, t\u1ec7p ch\u1ee9a ch\u01b0\u01a1ng tr\u00ecnh v\u00e0 t\u00ean c\u1ee7a l\u1edbp ph\u1ea3i gi\u1ed1ng nhau. M\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi ng\u01b0\u1eddi d\u00f9ng v\u00e0 bao g\u1ed3m hai th\u00e0nh ph\u1ea7n ch\u00ednh: c\u00e1c bi\u1ebfn th\u00e0nh vi\u00ean (data members) v\u00e0 c\u00e1c h\u00e0m th\u00e0nh vi\u00ean (member functions).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thanh_vien_du_lieu_Data_Member\"><\/span><strong>Th\u00e0nh vi\u00ean d\u1eef li\u1ec7u (Data Member)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Th\u00e0nh vi\u00ean d\u1eef li\u1ec7u (Data Member) l\u00e0 c\u00e1c bi\u1ebfn c\u00f3 th\u1ec3 thu\u1ed9c ki\u1ec3u d\u1eef li\u1ec7u var trong PHP. N\u1ebfu kh\u00f4ng c\u00f3 c\u00e1c Data Member, m\u00e3 ngu\u1ed3n c\u1ee7a b\u1ea1n s\u1ebd tr\u1edf n\u00ean r\u1ea5t kh\u00f3 hi\u1ec3u v\u00e0 kh\u00f3 b\u1ea3o tr\u00ec.<\/p>\n\n\n\n<p>C\u00e1c Data Member c\u00f3 th\u1ec3 c\u00f3 ba lo\u1ea1i ch\u1ebf \u0111\u1ed9 hi\u1ec3n th\u1ecb quy\u1ebft \u0111\u1ecbnh quy\u1ec1n truy c\u1eadp c\u1ee7a c\u00e1c th\u00e0nh vi\u00ean n\u00e0y. Bao g\u1ed3m:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ch\u1ebf \u0111\u1ed9 ri\u00eang t\u01b0 (private) cho ph\u00e9p truy c\u1eadp v\u00e0o th\u00e0nh vi\u00ean d\u1eef li\u1ec7u ch\u1ec9 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c truy xu\u1ea5t.&nbsp;<\/li>\n\n\n\n<li>Ch\u1ebf \u0111\u1ed9 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 (protected) cho ph\u00e9p l\u1edbp con truy c\u1eadp v\u00e0o th\u00e0nh vi\u00ean d\u1eef li\u1ec7u c\u1ee7a l\u1edbp cha b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c truy xu\u1ea5t.&nbsp;<\/li>\n\n\n\n<li>Ch\u1ebf \u0111\u1ed9 c\u00f4ng khai (public) cho ph\u00e9p truy c\u1eadp v\u00e0o th\u00e0nh vi\u00ean d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch g\u1ecdi tr\u1ef1c ti\u1ebfp t\u1eeb b\u00ean ngo\u00e0i l\u1edbp.<\/li>\n<\/ul>\n\n\n\n<p>Ngo\u00e0i ra, c\u00e1c Data Member c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng nh\u01b0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, x\u1eed l\u00fd d\u1eef li\u1ec7u v\u00e0 truy c\u1eadp d\u1eef li\u1ec7u. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c Data Member s\u1ebd gi\u00fap cho m\u00e3 ngu\u1ed3n c\u1ee7a b\u1ea1n tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-3.jpg\" alt=\"Data Member gi\u00fap cho m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n\" class=\"wp-image-5411\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-3.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-3-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-3-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Data Member gi\u00fap cho m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ham_thanh_vien_Member_Functions\"><\/span><strong>H\u00e0m th\u00e0nh vi\u00ean (Member Functions)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Member Functions l\u00e0 nh\u1eefng h\u00e0m \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong m\u1ed9t l\u1edbp v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c Data Member c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c h\u00e0m n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c d\u1eef li\u1ec7u c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p>B\u00ean c\u1ea1nh vi\u1ec7c truy c\u1eadp t\u1eeb b\u00ean trong l\u1edbp, Member Functions c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1eeb b\u00ean ngo\u00e0i l\u1edbp \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u1eefng h\u00e0m n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng k\u00e8m theo d\u1ea5u ch\u1ea5m.<\/p>\n\n\n\n<p>\u0110\u1ec3 b\u1ea3o v\u1ec7 t\u00ednh ri\u00eang t\u01b0 c\u1ee7a c\u00e1c th\u00e0nh vi\u00ean c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng, m\u1ed9t s\u1ed1 Member Functions \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 ri\u00eang t\u01b0 v\u00e0 kh\u00f4ng th\u1ec3 truy c\u1eadp t\u1eeb b\u00ean ngo\u00e0i l\u1edbp. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady, c\u00e1c Data Member ph\u00e1t huy t\u00e1c d\u1ee5ng. Tuy nhi\u00ean, \u0111\u1ec3 truy c\u1eadp c\u00e1c th\u00e0nh vi\u00ean d\u1eef li\u1ec7u ri\u00eang t\u01b0, c\u00e1c Member Functions \u0111\u01b0\u1ee3c t\u1ea1o ri\u00eang \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c n\u00e0y. Nh\u1eefng h\u00e0m n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c Member Functions truy c\u1eadp th\u00e0nh vi\u00ean ri\u00eang t\u01b0.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-4.jpg\" alt=\"Member Functions s\u1ebd li\u00ean quan \u0111\u1ebfn h\u00e0m th\u00e0nh vi\u00ean c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP\" class=\"wp-image-5410\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-4.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-4-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-4-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Member Functions s\u1ebd li\u00ean quan \u0111\u1ebfn h\u00e0m th\u00e0nh vi\u00ean c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Doi_tuong_Object\"><\/span><strong>\u0110\u1ed1i t\u01b0\u1ee3ng (Object)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb m\u1ed9t l\u1edbp. \u0110\u1ed1i t\u01b0\u1ee3ng ch\u1ee9a c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a l\u1edbp v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c th\u00e0nh vi\u00ean d\u1eef li\u1ec7u c\u1ee7a l\u1edbp.&nbsp;<\/p>\n\n\n\n<p>Tuy nhi\u00ean, m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng trong m\u1ed9t l\u1edbp c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem nh\u01b0 m\u1ed9t th\u1ef1c th\u1ec3 v\u1edbi ch\u1ee9c n\u0103ng v\u00e0 thu\u1ed9c t\u00ednh ri\u00eang c\u1ee7a n\u00f3. V\u00ec v\u1eady, b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u1ed1i t\u01b0\u1ee3ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c Data Member c\u1ee7a m\u1ed9t l\u1edbp v\u00e0 x\u1eed l\u00fd c\u00e1c h\u00e0nh vi v\u00e0 thu\u1ed9c t\u00ednh c\u1ee7a n\u00f3.&nbsp;<\/p>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng h\u01a1n trong vi\u1ec7c l\u1eadp tr\u00ecnh v\u00e0 qu\u1ea3n l\u00fd c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a ph\u1ea7n m\u1ec1m. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eeb m\u1ed9t l\u1edbp, s\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o m\u1ee5c \u0111\u00edch.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-5.jpg\" alt=\"\u0110\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP s\u1ebd \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb m\u1ed9t l\u1edbp\" class=\"wp-image-5409\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-5.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-5-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-5-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>\u0110\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP s\u1ebd \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb m\u1ed9t l\u1edbp<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhung_thuoc_tinh_cua_lap_trinh_OOP_trong_PHP\"><\/span><strong>Nh\u1eefng thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nh\u1eefng thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Truu_tuong_hoa_du_lieu_Data_Abstraction\"><\/span><strong>Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u (Data Abstraction)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u (Data Abstraction) l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m r\u1ea5t quan tr\u1ecdng trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 cho ph\u00e9p b\u1ea1n gi\u1ea5u \u0111i nh\u1eefng chi ti\u1ebft tri\u1ec3n khai v\u00e0 cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng m\u1ed9t giao di\u1ec7n tr\u1eebu t\u01b0\u1ee3ng \u0111\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap cho vi\u1ec7c l\u1eadp tr\u00ecnh tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 gi\u1ea3m s\u1ef1 ph\u1ee9c t\u1ea1p trong m\u00e3 ngu\u1ed3n. Trong PHP, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a \u201cabstract\u201d \u0111\u1ec3 khai b\u00e1o m\u1ed9t l\u1edbp tr\u1eebu t\u01b0\u1ee3ng.<\/p>\n\n\n\n<p>N\u00f3i c\u00e1ch kh\u00e1c, tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u cho ph\u00e9p b\u1ea1n t\u1eadp trung v\u00e0o c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i quan t\u00e2m \u0111\u1ebfn chi ti\u1ebft b\u00ean trong. \u0110i\u1ec1u n\u00e0y gi\u00fap cho m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean d\u1ec5 \u0111\u1ecdc h\u01a1n v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n. Khi s\u1eed d\u1ee5ng tr\u1eebu t\u01b0\u1ee3ng h\u00f3a d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n thi\u1ebft \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3 m\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft ph\u1ea3i bi\u1ebft chi ti\u1ebft b\u00ean trong c\u1ee7a nhi\u1ec7m v\u1ee5 \u0111\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dong_goi_du_lieu_Data_Encapsulation\"><\/span><strong>\u0110\u00f3ng g\u00f3i d\u1eef li\u1ec7u (Data Encapsulation)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00f3ng g\u00f3i d\u1eef li\u1ec7u (Data Encapsulation) l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, gi\u00fap b\u1ea1n b\u1ea3o v\u1ec7 c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng kh\u1ecfi vi\u1ec7c truy c\u1eadp tr\u00e1i ph\u00e9p b\u1eb1ng c\u00e1ch \u0111\u1eb7t ch\u00fang trong c\u00e1c ph\u01b0\u01a1ng th\u1ee9c getter v\u00e0 setter. Trong PHP, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a \u201cprivate\u201d \u0111\u1ec3 \u0111\u1eb7t c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng th\u00e0nh private.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-6.jpg\" alt=\"Data Encapsulation l\u00e0 m\u1ed9t thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP\" class=\"wp-image-5408\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-6.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-6-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-6-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Data Encapsulation l\u00e0 m\u1ed9t thu\u1ed9c t\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh OOP trong PHP<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c thu\u1ed9c t\u00ednh ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp b\u00ean trong l\u1edbp \u0111\u00f3 v\u00e0 kh\u00f4ng th\u1ec3 truy c\u1eadp t\u1eeb b\u00ean ngo\u00e0i. Ngo\u00e0i ra, \u0111\u00f3ng g\u00f3i d\u1eef li\u1ec7u c\u00f2n cho ph\u00e9p b\u1ea1n t\u1ea1o ra c\u00e1c h\u00e0m th\u00e0nh vi\u00ean trong PHP, \u0111\u1ec3 thao t\u00e1c ho\u1eb7c s\u1eed d\u1ee5ng d\u1eef li\u1ec7u \u0111\u00e3 cho.&nbsp;<\/p>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c c\u00e1ch th\u1ee9c truy c\u1eadp \u0111\u1ebfn d\u1eef li\u1ec7u v\u00e0 gi\u1eef cho d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt tr\u01b0\u1edbc m\u1ecdi h\u00ecnh th\u1ee9c thao t\u00e1c c\u1ee7a ng\u01b0\u1eddi b\u00ean ngo\u00e0i. Data v\u00e0 c\u00e1c Member Functions c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c cho l\u00e0 \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i trong m\u1ed9t \u00f4 duy nh\u1ea5t, gi\u00fap cho vi\u1ec7c qu\u1ea3n l\u00fd d\u1eef li\u1ec7u tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 x\u00e1o tr\u1ed9n trong m\u00e3 ngu\u1ed3n.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tinh_Modun_Modularity\"><\/span><strong>T\u00ednh Modun (Modularity)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>T\u00ednh Modun (Modularity) l\u00e0 m\u1ed9t t\u00ednh n\u0103ng kh\u00e1c c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng trong PHP. N\u00f3 cho ph\u00e9p b\u1ea1n chia nh\u1ecf m\u1ed9t \u1ee9ng d\u1ee5ng th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf h\u01a1n \u0111\u1ec3 d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o tr\u00ec.&nbsp;<\/p>\n\n\n\n<p>Trong PHP, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c v\u00e0 thu\u1ed9c t\u00ednh t\u0129nh (static) \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh Modun. T\u00ednh Modun s\u1ebd gi\u00fap b\u1ea1n gi\u1ea3m \u0111\u01b0\u1ee3c t\u00ednh ch\u1ea5t ph\u1ee9c t\u1ea1o, t\u1ea1o ra nhi\u1ec1u t\u00e0i li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac t\u1ed1t. T\u1eeb \u0111\u00f3 t\u0103ng ch\u1ea5t l\u01b0\u1ee3ng ch\u01b0\u01a1ng tr\u00ecnh t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tinh_ke_thua_Inheritance\"><\/span><strong>T\u00ednh k\u1ebf th\u1eeba (Inheritance)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>T\u00ednh k\u1ebf th\u1eeba (Inheritance) cho ph\u00e9p b\u1ea1n x\u00e2y d\u1ef1ng c\u00e1c l\u1edbp m\u1edbi b\u1eb1ng c\u00e1ch t\u00e1i s\u1eed d\u1ee5ng m\u00e3 c\u1ee7a c\u00e1c l\u1edbp hi\u1ec7n c\u00f3. Trong PHP, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1eeb kh\u00f3a \u201cextends\u201d \u0111\u1ec3 t\u1ea1o l\u1edbp con k\u1ebf th\u1eeba t\u1eeb l\u1edbp cha. Trong PHP, t\u00ednh k\u1ebf th\u1eeba \u0111\u01b0\u1ee3c chia th\u00e0nh 3 lo\u1ea1i bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00ednh k\u1ebf th\u1eeba \u0111\u01a1n: M\u1ed9t l\u1edbp con ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e9p k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a m\u1ed9t l\u1edbp cha duy nh\u1ea5t.<\/li>\n\n\n\n<li>T\u00ednh k\u1ebf th\u1eeba ph\u00e2n c\u1ea5p: M\u1ed9t l\u1edbp con c\u00f3 th\u1ec3 k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c l\u1edbp cha m\u00e0 n\u00f3 k\u1ebf th\u1eeba.<\/li>\n\n\n\n<li>T\u00ednh k\u1ebf th\u1eeba \u0111a c\u1ea5p: M\u1ed9t l\u1edbp con k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a m\u1ed9t l\u1edbp cha, c\u0169ng nh\u01b0 c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c l\u1edbp cha c\u1ee7a l\u1edbp cha \u0111\u00f3.&nbsp;<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-7.jpg\" alt=\"C\u00f3 3 lo\u1ea1i t\u00ednh k\u1ebf th\u1eeba c\u1ea7n bi\u1ebft trong khi l\u1eadp tr\u00ecnh OOP trong PHP\" class=\"wp-image-5406\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-7.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-7-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-7-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>C\u00f3 3 lo\u1ea1i t\u00ednh k\u1ebf th\u1eeba c\u1ea7n bi\u1ebft trong khi l\u1eadp tr\u00ecnh OOP trong PHP<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Co_hoi_viec_lam_cua_lap_trinh_OOP_PHP\"><\/span><strong>C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m c\u1ee7a l\u1eadp tr\u00ecnh OOP PHP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>N\u1ebfu b\u1ea1n l\u00e0 m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean PHP c\u00f3 kinh nghi\u1ec7m v\u00e0 mu\u1ed1n t\u00ecm ki\u1ebfm vi\u1ec7c l\u00e0m trong l\u0129nh v\u1ef1c l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP), th\u00ec c\u00f3 r\u1ea5t nhi\u1ec1u c\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m \u0111ang ch\u1edd \u0111\u00f3n b\u1ea1n. B\u1ea1n c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c \u1edf nh\u1eefng c\u00f4ng ty ph\u1ea7n m\u1ec1m, doanh nghi\u1ec7p c\u00f4ng ngh\u1ec7, c\u00e1c startup \u0111ang t\u00ecm ki\u1ebfm nh\u1eefng l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 kinh nghi\u1ec7m trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi PHP v\u1edbi nh\u1eefng v\u1ecb tr\u00ed nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u1eadp tr\u00ecnh vi\u00ean PHP (PHP developer)<\/strong>: L\u1eadp tr\u00ecnh vi\u00ean PHP chuy\u00ean v\u1ec1 vi\u1ec7c ph\u00e1t tri\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng web s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh PHP. B\u1ea1n c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c t\u1ea1i c\u00e1c c\u00f4ng ty ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m ho\u1eb7c l\u00e0m vi\u1ec7c t\u1ef1 do.<\/li>\n\n\n\n<li><strong>L\u1eadp tr\u00ecnh vi\u00ean backend<\/strong>: L\u1eadp tr\u00ecnh vi\u00ean backend t\u1eadp trung v\u00e0o vi\u1ec7c ph\u00e1t tri\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 h\u1ec7 th\u1ed1ng, x\u1eed l\u00fd d\u1eef li\u1ec7u tr\u00ean server. Ki\u1ebfn th\u1ee9c v\u1ec1 l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng PHP l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi l\u1eadp tr\u00ecnh vi\u00ean backend.<\/li>\n\n\n\n<li><strong>Nh\u00e0 ph\u00e1t tri\u1ec3n WordPress:<\/strong> WordPress l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ec1n t\u1ea3ng ph\u00e1t tri\u1ec3n website ph\u1ed5 bi\u1ebfn nh\u1ea5t tr\u00ean th\u1ebf gi\u1edbi. Ki\u1ebfn th\u1ee9c v\u1ec1 l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng PHP l\u00e0 m\u1ed9t y\u00eau c\u1ea7u c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n WordPress chuy\u00ean nghi\u1ec7p.<\/li>\n\n\n\n<li><a href=\"https:\/\/topviecit.vn\/blog\/ky-su-phan-mem-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>K\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m<\/strong><\/a>: K\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m l\u00e0m vi\u1ec7c \u0111\u1ec3 ph\u00e1t tri\u1ec3n v\u00e0 duy tr\u00ec c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m cho c\u00e1c c\u00f4ng ty v\u00e0 t\u1ed5 ch\u1ee9c kh\u00e1c nhau. Ki\u1ebfn th\u1ee9c v\u1ec1 l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng PHP l\u00e0 m\u1ed9t trong nh\u1eefng k\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m th\u00e0nh c\u00f4ng.<\/li>\n<\/ul>\n\n\n\n<p><strong>>>> Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-php-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">L\u1eadp tr\u00ecnh vi\u00ean PHP l\u00e0 g\u00ec? L\u1ed9 tr\u00ecnh th\u0103ng ti\u1ebfn c\u1ee7a l\u1eadp tr\u00ecnh vi\u00ean PHP<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-8.jpg\" alt=\"C\u00f3 nhi\u1ec1u c\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m khi b\u1ea1n h\u1ecdc l\u1eadp tr\u00ecnh OOP trong PHP\" class=\"wp-image-5407\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-8.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-8-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/05\/lap-trinh-oop-trong-php-topcv-8-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>C\u00f3 nhi\u1ec1u c\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m khi b\u1ea1n h\u1ecdc l\u1eadp tr\u00ecnh OOP trong PHP<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>Hy v\u1ecdng b\u1ea1n s\u1ebd hi\u1ec3u h\u01a1n v\u1ec1 l\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec v\u1edbi b\u00e0i vi\u1ebft trong chuy\u00ean m\u1ee5c <a href=\"https:\/\/topviecit.vn\/blog\/chuyen-muc\/chia-se-kinh-nghiem\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Chia s\u1ebb kinh nghi\u1ec7m<\/strong><\/a> ng\u00e0y h\u00f4m nay. N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm c\u00e1c c\u01a1 h\u1ed9i <strong><a href=\"https:\/\/www.topcv.vn\/viec-lam-it\" target=\"_blank\" rel=\"noreferrer noopener\">vi\u1ec7c l\u00e0m IT<\/a><\/strong> li\u00ean quan \u0111\u1ebfn l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh PHP, h\u00e3y truy c\u1eadp ngay v\u00e0o <a href=\"https:\/\/www.topcv.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopCV<\/strong><\/a>.<\/p>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u <a href=\"https:\/\/www.topcv.vn\/mau-cv\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>t\u1ea1o CV<\/strong><\/a> nhanh ch\u00f3ng v\u1edbi n\u1ec1n t\u1ea3ng tuy\u1ec3n d\u1ee5ng n\u00e0y v\u00e0 ti\u1ebfp c\u1eadn ngay v\u1edbi c\u00e1c c\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m h\u1ea5p d\u1eabn. TopCV \u0111ang \u00e1p d\u1ee5ng s\u00e2u tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o v\u00e0 Big Data th\u00f4ng minh, s\u1ebd nhanh ch\u00f3ng g\u1ee3i \u00fd CV c\u1ee7a b\u1ea1n \u0111\u1ebfn nh\u00e0 tuy\u1ec3n d\u1ee5ng ph\u00f9 h\u1ee3p \u0111\u1ec3 gi\u00fap b\u1ea1n t\u00ecm vi\u1ec7c l\u00e0m th\u00e0nh c\u00f4ng h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP) l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh hi\u1ec7n nay, bao g\u1ed3m c\u1ea3 PHP. V\u1eady, l\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec? H\u00e3y c\u00f9ng TopviecIT t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 kh\u00e1i ni\u1ec7m n\u00e0y trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y nh\u00e9. L\u1eadp [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5414,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[86],"tags":[1371,33,134,1391,34,1392],"class_list":["post-5405","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem","tag-lap-trinh-huong-doi-tuong-la-gi-2","tag-lap-trinh-php-la-gi","tag-oop-la-gi","tag-oop-trong-php","tag-php-developer-la-gi","tag-tinh-da-hinh-trong-php"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec? Nh\u1eefng th\u00f4ng tin newbie c\u1ea7n bi\u1ebft<\/title>\n<meta name=\"description\" content=\"L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh, bao g\u1ed3m PHP. V\u1eady, l\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-oop-trong-php\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u1eadp tr\u00ecnh OOP trong PHP l\u00e0 g\u00ec? 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