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Website Programming in PHP / MYSQL
call_user_func_array
(PHP 4 >= 4.0.4, PHP 5)
call_user_func_array — Call a user function given with an array of parameters
Description
Call a user defined function with the parameters in param_arr .
Parameters
- function
-
The function to be called.
- param_arr
-
The parameters to be passed to the function, as an indexed array.
Return Values
Returns the function result, or FALSE on error.
Examples
Example #1 call_user_func_array() example
<?php
function debug($var, $val)
{
echo "***DEBUGGING\nVARIABLE: $var\nVALUE:";
if (is_array($val) || is_object($val) || is_resource($val)) {
print_r($val);
} else {
echo "\n$val\n";
}
echo "***\n";
}
$c = mysql_connect();
$host = $_SERVER["SERVER_NAME"];
call_user_func_array('debug', array("host", $host));
call_user_func_array('debug', array("c", $c));
call_user_func_array('debug', array("_POST", $_POST));
?>
Example #2 call_user_func_array() using namespace name
<?php
namespace Foobar;
class Foo {
static public function test($name) {
print "Hello {$name}!\n";
}
}
// As of PHP 5.3.0
call_user_func_array(__NAMESPACE__ .'::Foo::test', array('Hannes'));
// Hello Hannes!
// As of PHP 5.3.0
call_user_func_array(array(__NAMESPACE__ .'::Foo', 'test'), array('Philip'));
// Hello Philip!
?>
Notes
Note: Referenced variables in param_arr are passed to the function by a reference, others are passed by a value. In other words, it does not depend on the function signature whether the parameter is passed by a value or by a reference.
