How does a PHP function return the class name?

There are the following methods in PHP to get the class name of a function: CLASS magic constant __CLASS__: Returns the current class name. get_class() function: Returns the class name of the object. debug_backtrace() function: can obtain call stack information, including class name.

Get the class name of the PHP function

Some functions in PHP can return the class name. This article will introduce these functions and practical cases.

CLASS Magic constant

__CLASS__ Magic constant returns the current class name:

class MyClass {
    public static function getClassName() {
        return __CLASS__;
    }
}

Actual case:

$myClass = new MyClass();
echo $myClass->getClassName(); // 输出 "MyClass"

get_class() function

get_class() The function returns the class name of the object:

class MyClass {
}

$myClass = new MyClass();
echo get_class($myClass); // 输出 "MyClass"

Actual case:

function getType($object) {
    return get_class($object);
}

$object = new stdClass();
echo getType($object); // 输出 "stdClass"

debug_backtrace() function

debug_backtrace() The function can be used to obtain call stack information, including class name:

class MyClass {
    public static function getCallerClassName() {
        $trace = debug_backtrace();
        return $trace[1]['class']; // 获取调用者类名
    }
}

Actual combat Case:

class CallingClass {
    public static function callMethod() {
        return MyClass::getCallerClassName();
    }
}

echo CallingClass::callMethod(); // 输出 "CallingClass"

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