# uopz_set_return

(PECL uopz 5)

uopz_set_return — 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.

> Note:

> 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

Example #1 uopz_set_return() example

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

以上例程会输出：

    42

Example #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：

    12

Example #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：

    12