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                call_user_func函數類似于一種特別的調用函數的方法,使用方法如下 ~~~ <?php function nowamagic($a,$b) { echo $a; echo $b; } call_user_func('nowamagic', "111","222"); call_user_func('nowamagic', "333","444"); //顯示 111 222 333 444 ~~~ 調用類內部的方法比較奇怪,居然用的是array,不知道開發者是如何考慮的,當然省去了new,也挺有新意的: ~~~ <?php class a { function b($c) { echo $c; } } //5.5版本再這樣寫就報錯,要先實例化 a call_user_func(array("a", "b"),"111"); //顯示 111 ~~~ call_user_func_array函數和call_user_func很相似,只不過是換了一種方式傳遞了參數,讓參數的結構更清晰: ~~~ <?php function a($b, $c) { echo $b; echo $c; } call_user_func_array('a', array("111", "222")); //顯示 111 222 ~~~ call_user_func_array函數也可以調用類內部的方法的: ~~~ <?php Class ClassA { function bc($b, $c) { $bc = $b + $c; echo $bc; } } call_user_func_array(array('ClassA','bc'), array("111", "222")); //顯示 333 ~~~ call_user_func函數和call_user_func_array函數都支持引用,這讓他們和普通的函數調用更趨于功能一致: ~~~ <?php function a($b) { $b++; } $c = 0; call_user_func('a', $c); echo $c;//顯示 1 call_user_func_array('a', array($c)); echo $c;//顯示 2 ~~~ 另外,call_user_func函數和call_user_func_array函數都支持引用 ~~~ <?php function increment(&$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 ~~~
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