Provide a return value for an existing function

说明

uopz_set_return ( string $function , mixed $value , bool $execute = false ) : bool

uopz_set_return ( string $class , string $function , mixed $value , bool $execute = false ) : bool

Sets the return value of the function to value. If value is a Closure and execute is set, the Closure will be executed in place of the original function. It is possible to call the original function from the Closure.

注意:
This function replaces uopz_rename().

参数

class: The name of the class containing the function
function: The name of an existing function
value: The value the function should return. If a Closure is provided and the execute flag is set, the Closure will be executed in place of the original function.
execute: If true, and a Closure was provided as the value, the Closure will be executed in place of the original function.

返回值

True if succeeded, false otherwise.

范例

示例 #1 uopz_set_return() example


<?php
uopz_set_return("strlen", 42);
echo strlen("Banana");
?>

以上例程会输出：

示例 #2 uopz_set_return() example


<?php
uopz_set_return("strlen", function($str) { return strlen($str) * 2; }, true );
echo strlen("Banana");
?>

以上例程会输出：

示例 #3 uopz_set_return() class example


<?php
class My {
    public static function strlen($arg) {
        return strlen($arg);
    }
}
uopz_set_return(My::class, "strlen", function($str) { return strlen($str) * 2; }, true );
echo My::strlen("Banana");
?>

以上例程会输出：