php中如何调用用户自定义函数实例详解

function a($b,$c)    
{    
echo $b;    
echo $c;    
}    
call_user_func('a', "111","222");    
call_user_func('a', "333","444");    
//显示 111 222 333 444

class
 a {    
function b($c)    
{    
echo $c;    
}    
}    
call_user_func(array("a", "b"),"111");    
//显示 111

function a($b, $c)    
{    
echo $b;    
echo $c;    
}    
call_user_func_array('a', array("111", "222"));    
//显示 111 222

Class ClassA    
{    
function bc($b, $c) {    
     $bc = $b + $c;    
echo $bc;    
}    
}    
call_user_func_array(array('ClassA','bc'), array("111", "222"));    
//显示 333

function a($b)    
{    
$b++;    
}    
$c = 0;    
call_user_func('a', $c);    
echo $c;//显示 1    
call_user_func_array('a', array($c));    
echo $c;//显示 2

<?php
function increment(&$var)
{
    $var++;
}
$a = 0;
call_user_func(&#39;increment&#39;, $a);
echo $a; // 0
call_user_func_array(&#39;increment&#39;, array(&$a)); // You can use this instead
echo $a; // 1
?>