(PECL uopz 5, PECL uopz 6)
uopz_set_return — Provide a return value for an existing function
$class
, string $function
, mixed $value
[, bool $execute = FALSE
] ) : bool
Sets the return value of the function to value. If value
is a Closure and execute is set, the Closure will be executed in place of the original function.
It is possible to call the original function from the Closure.
Note:
This function replaces uopz_rename().
classThe name of the class containing the function
functionThe name of an existing function
valueThe value the function should return. If a Closure is provided and the execute flag is set, the Closure will be executed in place of the original function.
executeIf true, and a Closure was provided as the value, the Closure will be executed in place of the original function.
True if succeeded, false otherwise.
Example #1 uopz_set_return() example
<?php
uopz_set_return("strlen", 42);
echo strlen("Banana");
?>
以上例程会输出：
42
Example #2 uopz_set_return() example
<?php
uopz_set_return("strlen", function($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