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call_user_func
Call a user function given by the first parameter
(PHP 4, PHP 5)
mixed call_user_func ( callback function [, mixed parameter [, mixed ...]] )
Parameters
- function
The function to be called. Class methods may also be invoked statically using this function by passing
array($classname, $methodname)to this parameter.- parameter
Zero or more parameters to be passed to the function.
Note:Note that the parameters for call_user_func() are not passed by reference.
<?php
function increment(&$var)
{
$var++;
}
$a = 0;
call_user_func('increment', $a);
echo $a; // 0
call_user_func_array('increment', array(&$a)); // You can use this instead
echo $a; // 1
?>
Examples
Example 753. call_user_func() example
<?php
function barber($type)
{
echo "You wanted a $type haircut, no problem";
}
call_user_func('barber', "mushroom");
call_user_func('barber', "shave");
?>
Example 754. Using a class method
<?php
class myclass {
function say_hello()
{
echo "Hello!\n";
}
}
$classname = "myclass";
call_user_func(array($classname, 'say_hello'));
?>
See Also
| call_user_func_array() |
| is_callable() |
| information about the callback type |