(PHP 4 >= 4.0.4, PHP 5)
call_user_func_array — Call a user function given with an array of parameters
Call a user defined function with the parameters in param_arr.
The function to be called.
The parameters to be passed to the function, as an indexed array.
Returns the function result, or FALSE on error.
| 版本 | 说明 |
|---|---|
| 5.3.0 | The interpretation of object oriented keywords like parent and self has changed. Previously, calling them using the double colon syntax would emit an E_STRICT warning because they were interpreted as static. |
Example #1 call_user_func_array() example 以上例程的输出类似于： Example #2 call_user_func_array() using namespace name 以上例程的输出类似于： Example #3 Using lambda function 以上例程会输出：
<?php
function foobar($arg, $arg2) {
echo __FUNCTION__, " got $arg and $arg2
";
}
class foo {
function bar($arg, $arg2) {
echo __METHOD__, " got $arg and $arg2
";
}
}
// Call the foobar() function with 2 arguments
call_user_func_array("foobar", array("one", "two"));
// Call the $foo->bar() method with 2 arguments
$foo = new foo;
call_user_func_array(array($foo, "bar"), array("three", "four"));
?>
foobar got one and two
foo::bar got three and four
<?php
namespace Foobar;
class Foo {
static public function test($name) {
print "Hello {$name}!
";
}
}
// As of PHP 5.3.0
call_user_func_array(__NAMESPACE__ .'Foo::test', array('Hannes'));
// As of PHP 5.3.0
call_user_func_array(array(__NAMESPACE__ .'Foo', 'test'), array('Philip'));
?>
Hello Hannes!
Hello Philip!
<?php
$func = function($arg1, $arg2) {
return $arg1 * $arg2;
};
var_dump(call_user_func_array($func, array(2, 4))); /* As of PHP 5.3.0 */
?>
int(8)
Note:
Referenced variables in param_arr are passed to the function by reference, regardless of whether the function expects the respective parameter to be passed by reference. This form of call-time pass by reference does not emit a deprecation notice, but it is nonetheless deprecated, and will most likely be removed in the next version of PHP. Furthermore, this does not apply to internal functions, for which the function signature is honored. Passing by value when the function expects a parameter by reference results in a warning and having call_user_func() return FALSE (does not apply if the passed value has a reference count = 1).
Note:
在函数中注册有多个回调内容时(如使用 call_user_func() 与 call_user_func_array())，如在前一个回调中有未捕获的异常，其后的将不再被调用。