There are several ways to use static methods in php classes

How to use static methods in PHP classes: 1. Use self, the code is [self::test();]; 2. Use the class name, the code is [public function test1()a:: test()]; 3. Use static, the code is [static::test()].

How to use static methods in php classes:

1. Use self, the code is as follows

<?php  
class a {  
    private static function test() {  
        echo &#39;test&#39;;  
    }  
    public function test1() {  
        self::test();  
    }  
}  
$ab = new a();  
$ab->test1();//结果 test

2. Use the class name, the code is as follows

<?php  
class a {  
    private static function test() {  
        echo &#39;test&#39;;  
    }  
    public function test1() {  
        a::test();  
    }  
}  
$ab = new a();  
$ab->test1();//结果 test

3. Use static, the code is as follows

<?php  
class a {  
    private static function test() {  
        echo &#39;test&#39;;  
    }  
    public function test1() {  
        static::test();  
    }  
}  
$ab = new a();  
$ab->test1();//结果 test

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