How does a PHP function return the function name?

Get the name of the executing function through the FUNCTION magic constant in PHP: Syntax: $function_name = __FUNCTION__; Usage: Use FUNCTION inside the function to get the name of the calling function; Note: It can only be used inside the function, and only the function name is returned. , does not contain a namespace or class name, and returns an empty string when used as an anonymous function.

#How does a PHP function return the function name?

A powerful feature in PHP is the ability to get the name of the function being executed via the __FUNCTION__ magic constant. This constant can be used inside a function to get the name of the calling function.

Syntax:

$function_name = __FUNCTION__;

Practical case:

The following is an example of getting the function name inside the function:

function get_function_name() {
  echo "当前函数名：" . __FUNCTION__;
}

get_function_name();

This code will output:

当前函数名：get_function_name

Other notes:

• __FUNCTION__ Constants can only be used inside functions .
• This constant returns only the name of the function, not the namespace or class name.
• If the function has no name (such as an anonymous function), __FUNCTION__ will return an empty string.

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