{"id":3006,"date":"2025-03-19T21:57:02","date_gmt":"2025-03-19T13:57:02","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3006"},"modified":"2025-03-19T22:32:26","modified_gmt":"2025-03-19T14:32:26","slug":"php-%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%88oop%ef%bc%89%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/19\/php-%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%88oop%ef%bc%89%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97\/","title":{"rendered":"PHP \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1. <strong>\u4ec0\u4e48\u662f PHP \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\uff1f<\/strong><\/h2>\n\n\n\n<p>PHP <strong>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09<\/strong> \u662f\u4e00\u79cd\u57fa\u4e8e <strong>\u7c7b\uff08Class\uff09\u548c\u5bf9\u8c61\uff08Object\uff09<\/strong> \u7684\u7f16\u7a0b\u8303\u5f0f\uff0c\u5f3a\u8c03 <strong>\u5c01\u88c5\uff08Encapsulation\uff09\u3001\u7ee7\u627f\uff08Inheritance\uff09\u548c\u591a\u6001\uff08Polymorphism\uff09<\/strong>\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0<strong>\u6a21\u5757\u5316\u3001\u53ef\u590d\u7528\u548c\u6613\u7ef4\u62a4<\/strong>\u3002<\/p>\n\n\n\n<p>\u2705 <strong>OOP \u7684\u4f18\u52bf\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4ee3\u7801\u53ef\u91cd\u7528<\/strong>\uff1a\u901a\u8fc7\u7c7b\u548c\u7ee7\u627f\u673a\u5236\u51cf\u5c11\u91cd\u590d\u4ee3\u7801\u3002<\/li>\n\n\n\n<li><strong>\u4ee3\u7801\u66f4\u6613\u7ba1\u7406<\/strong>\uff1a\u4f7f\u7528\u7c7b\u7ed3\u6784\u7ec4\u7ec7\u4ee3\u7801\uff0c\u63d0\u9ad8\u53ef\u8bfb\u6027\u3002<\/li>\n\n\n\n<li><strong>\u66f4\u9ad8\u7684\u5b89\u5168\u6027<\/strong>\uff1a\u53ef\u4ee5\u4f7f\u7528\u8bbf\u95ee\u63a7\u5236\uff08<code>public<\/code>\u3001<code>private<\/code>\u3001<code>protected<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u66f4\u5f3a\u7684\u6269\u5c55\u6027<\/strong>\uff1a\u4f7f\u7528\u7ee7\u627f\u548c\u591a\u6001\u673a\u5236\u6269\u5c55\u5df2\u6709\u529f\u80fd\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. <strong>PHP \u7c7b\u548c\u5bf9\u8c61<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5b9a\u4e49\u7c7b\uff08Class\uff09<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Car {\n    \/\/ \u6210\u5458\u53d8\u91cf\uff08\u5c5e\u6027\uff09\n    public $brand;\n    public $color;\n\n    \/\/ \u6784\u9020\u51fd\u6570\n    function __construct($brand, $color) {\n        $this-&gt;brand = $brand;\n        $this-&gt;color = $color;\n    }\n\n    \/\/ \u6210\u5458\u65b9\u6cd5\uff08\u51fd\u6570\uff09\n    function displayInfo() {\n        return \"This car is a $this-&gt;color $this-&gt;brand.\";\n    }\n}\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u521b\u5efa\u5bf9\u8c61<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$car1 = new Car(\"Toyota\", \"Red\");\necho $car1-&gt;displayInfo(); \/\/ \u8f93\u51fa: This car is a Red Toyota.\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u89e3\u91ca<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>new<\/code> \u5173\u952e\u5b57\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><code>$this->propertyName<\/code> \u8bbf\u95ee\u5f53\u524d\u5bf9\u8c61\u7684\u5c5e\u6027\u3002<\/li>\n\n\n\n<li><code>__construct()<\/code> \u662f\u6784\u9020\u51fd\u6570\uff0c\u6bcf\u6b21\u521b\u5efa\u5bf9\u8c61\u65f6\u81ea\u52a8\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. <strong>PHP \u8bbf\u95ee\u63a7\u5236\u4fee\u9970\u7b26<\/strong><\/h2>\n\n\n\n<p>PHP \u63d0\u4f9b <code>public<\/code>\u3001<code>protected<\/code> \u548c <code>private<\/code> \u4e09\u79cd\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5173\u952e\u5b57<\/th><th>\u4f5c\u7528<\/th><\/tr><\/thead><tbody><tr><td><code>public<\/code><\/td><td>\u516c\u5f00\u8bbf\u95ee\uff0c\u7c7b\u5185\u5916\u90e8\u90fd\u53ef\u4ee5\u8bbf\u95ee<\/td><\/tr><tr><td><code>protected<\/code><\/td><td>\u53d7\u4fdd\u62a4\uff0c\u53ea\u6709\u7c7b\u5185\u90e8\u548c\u5b50\u7c7b\u53ef\u4ee5\u8bbf\u95ee<\/td><\/tr><tr><td><code>private<\/code><\/td><td>\u79c1\u6709\uff0c\u53ea\u6709\u7c7b\u5185\u90e8\u53ef\u4ee5\u8bbf\u95ee<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u8bbf\u95ee\u63a7\u5236\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Person {\n    public $name;       \/\/ \u516c\u5f00\n    protected $age;     \/\/ \u53d7\u4fdd\u62a4\n    private $password;  \/\/ \u79c1\u6709\n\n    function __construct($name, $age, $password) {\n        $this-&gt;name = $name;\n        $this-&gt;age = $age;\n        $this-&gt;password = $password;\n    }\n\n    function getAge() {\n        return $this-&gt;age; \/\/ \u53d7\u4fdd\u62a4\u7684\u5c5e\u6027\u53ef\u4ee5\u5728\u7c7b\u5185\u8bbf\u95ee\n    }\n}\n\n$person = new Person(\"Alice\", 25, \"1234\");\necho $person-&gt;name;     \/\/ \u2705 \u5141\u8bb8\u8bbf\u95ee\n\/\/ echo $person-&gt;age;   \/\/ \u274c \u62a5\u9519\uff1aprotected\n\/\/ echo $person-&gt;password; \/\/ \u274c \u62a5\u9519\uff1aprivate\necho $person-&gt;getAge(); \/\/ \u2705 \u901a\u8fc7\u65b9\u6cd5\u8bbf\u95ee protected \u5c5e\u6027\n?&gt;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. <strong>PHP \u7ee7\u627f\uff08Inheritance\uff09<\/strong><\/h2>\n\n\n\n<p>\u5b50\u7c7b\u53ef\u4ee5<strong>\u7ee7\u627f<\/strong>\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\ud83d\udccc \u5b9a\u4e49\u5b50\u7c7b<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Animal {\n    public $name;\n\n    function __construct($name) {\n        $this-&gt;name = $name;\n    }\n\n    function makeSound() {\n        return \"Some sound\";\n    }\n}\n\n\/\/ Dog \u7ee7\u627f Animal\nclass Dog extends Animal {\n    function makeSound() {\n        return \"Woof! Woof!\";\n    }\n}\n\n$dog = new Dog(\"Buddy\");\necho $dog-&gt;name;         \/\/ \u2705 \u7ee7\u627f\u7236\u7c7b\u5c5e\u6027\necho $dog-&gt;makeSound();  \/\/ \u8f93\u51fa: Woof! Woof!\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>class Dog extends Animal<\/code>\uff1a<code>Dog<\/code> \u7ee7\u627f <code>Animal<\/code>\u3002<\/li>\n\n\n\n<li>\u5b50\u7c7b <code>Dog<\/code> <strong>\u53ef\u4ee5\u91cd\u5199\uff08override\uff09<\/strong> \u7236\u7c7b\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. <strong>PHP \u591a\u6001\uff08Polymorphism\uff09<\/strong><\/h2>\n\n\n\n<p><strong>\u591a\u6001<\/strong> \u5141\u8bb8\u5b50\u7c7b\u4ee5\u4e0d\u540c\u65b9\u5f0f\u5b9e\u73b0\u7236\u7c7b\u7684\u540c\u4e00\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u591a\u6001\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Animal {\n    function makeSound() {\n        return \"Some sound\";\n    }\n}\n\nclass Dog extends Animal {\n    function makeSound() {\n        return \"Bark!\";\n    }\n}\n\nclass Cat extends Animal {\n    function makeSound() {\n        return \"Meow!\";\n    }\n}\n\n$animals = &#91;new Dog(), new Cat()];\n\nforeach ($animals as $animal) {\n    echo $animal-&gt;makeSound() . \"\\n\";\n}\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Dog<\/code> \u548c <code>Cat<\/code> \u7ee7\u627f <code>Animal<\/code>\uff0c\u4f46\u5b9e\u73b0\u81ea\u5df1\u7684 <code>makeSound()<\/code> \u65b9\u6cd5\u3002<\/li>\n\n\n\n<li><code>foreach<\/code> \u904d\u5386\u5bf9\u8c61\u6570\u7ec4\uff0c\u4e0d\u7ba1\u662f <code>Dog<\/code> \u8fd8\u662f <code>Cat<\/code>\uff0c\u90fd\u53ef\u4ee5\u8c03\u7528 <code>makeSound()<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. <strong>PHP \u62bd\u8c61\u7c7b\uff08Abstract Class\uff09<\/strong><\/h2>\n\n\n\n<p>\u62bd\u8c61\u7c7b <strong>\u4e0d\u80fd\u5b9e\u4f8b\u5316<\/strong>\uff0c\u53ea\u80fd\u88ab\u7ee7\u627f\uff0c\u5e76\u4e14\u53ef\u4ee5\u5305\u542b<strong>\u62bd\u8c61\u65b9\u6cd5<\/strong>\uff08\u4e0d\u5e26\u65b9\u6cd5\u4f53\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u62bd\u8c61\u7c7b\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nabstract class Shape {\n    abstract function getArea();\n}\n\nclass Circle extends Shape {\n    private $radius;\n\n    function __construct($radius) {\n        $this-&gt;radius = $radius;\n    }\n\n    function getArea() {\n        return pi() * $this-&gt;radius * $this-&gt;radius;\n    }\n}\n\n$circle = new Circle(5);\necho $circle-&gt;getArea(); \/\/ \u8f93\u51fa: 78.5398\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>abstract class Shape<\/code> \u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\u3002<\/li>\n\n\n\n<li><code>abstract function getArea();<\/code> \u5728\u5b50\u7c7b <code>Circle<\/code> \u5fc5\u987b\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. <strong>PHP \u63a5\u53e3\uff08Interface\uff09<\/strong><\/h2>\n\n\n\n<p><strong>\u63a5\u53e3<\/strong> \u89c4\u5b9a\u4e86\u5fc5\u987b\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c<strong>\u4f46\u4e0d\u5305\u542b\u5b9e\u73b0<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u63a5\u53e3\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\ninterface Animal {\n    function makeSound();\n}\n\nclass Dog implements Animal {\n    function makeSound() {\n        return \"Bark!\";\n    }\n}\n\nclass Cat implements Animal {\n    function makeSound() {\n        return \"Meow!\";\n    }\n}\n\n$dog = new Dog();\necho $dog-&gt;makeSound(); \/\/ \u8f93\u51fa: Bark!\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>interface Animal<\/code> \u53ea\u89c4\u5b9a <code>makeSound()<\/code> \u65b9\u6cd5\uff0c<strong>\u4e0d\u63d0\u4f9b\u5b9e\u73b0<\/strong>\u3002<\/li>\n\n\n\n<li><code>class Dog implements Animal<\/code> \u5fc5\u987b<strong>\u5b9e\u73b0<\/strong> <code>makeSound()<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">8. <strong>PHP \u9759\u6001\u65b9\u6cd5 &amp; \u5c5e\u6027<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9759\u6001\u65b9\u6cd5<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass MathUtils {\n    public static function add($a, $b) {\n        return $a + $b;\n    }\n}\n\necho MathUtils::add(3, 5); \/\/ \u8f93\u51fa: 8\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>static<\/code> \u65b9\u6cd5\u65e0\u9700\u521b\u5efa\u5bf9\u8c61\uff0c\u76f4\u63a5\u8c03\u7528\uff1a<code>ClassName::methodName()<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9759\u6001\u5c5e\u6027<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Counter {\n    public static $count = 0;\n\n    static function increment() {\n        self::$count++;\n    }\n}\n\nCounter::increment();\necho Counter::$count; \/\/ \u8f93\u51fa: 1\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u2705 <strong>\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>static<\/code> \u5c5e\u6027\u901a\u8fc7 <code>self::$propertyName<\/code> \u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">10. <strong>\u603b\u7ed3<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>\u7279\u6027<\/strong><\/th><th><strong>\u63cf\u8ff0<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>\u7c7b<\/strong><\/td><td><code>class MyClass {}<\/code><\/td><\/tr><tr><td><strong>\u5bf9\u8c61<\/strong><\/td><td><code>$obj = new MyClass();<\/code><\/td><\/tr><tr><td><strong>\u6784\u9020\u51fd\u6570<\/strong><\/td><td><code>function __construct() {}<\/code><\/td><\/tr><tr><td><strong>\u8bbf\u95ee\u63a7\u5236<\/strong><\/td><td><code>public<\/code>\u3001<code>protected<\/code>\u3001<code>private<\/code><\/td><\/tr><tr><td><strong>\u7ee7\u627f<\/strong><\/td><td><code>class Child extends Parent {}<\/code><\/td><\/tr><tr><td><strong>\u591a\u6001<\/strong><\/td><td>\u5b50\u7c7b\u53ef\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5<\/td><\/tr><tr><td><strong>\u62bd\u8c61\u7c7b<\/strong><\/td><td><code>abstract class MyClass {}<\/code><\/td><\/tr><tr><td><strong>\u63a5\u53e3<\/strong><\/td><td><code>interface MyInterface {}<\/code><\/td><\/tr><tr><td><strong>\u9759\u6001\u65b9\u6cd5<\/strong><\/td><td><code>public static function method() {}<\/code><\/td><\/tr><tr><td><strong>\u9759\u6001\u5c5e\u6027<\/strong><\/td><td><code>public static $var;<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\ud83d\udd17 <strong>\u63a8\u8350\u9605\u8bfb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.php.net\/manual\/zh\/language.oop5.php\">PHP \u5b98\u65b9\u6587\u6863 &#8211; OOP<\/a><\/li>\n<\/ul>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. \u4ec0\u4e48\u662f PHP \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\uff1f PHP \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09 \u662f\u4e00\u79cd\u57fa\u4e8e \u7c7b\uff08Class\uff09\u548c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3007,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-3006","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3006"}],"version-history":[{"count":2,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3006\/revisions"}],"predecessor-version":[{"id":3049,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3006\/revisions\/3049"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3007"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}