PHP回调函数不处理对象函数 [英] PHP Callback function not working on object functions

问题描述

我有一个数组，并希望通过 array_walk 在数组的每个成员上应用 MySQLi-> real_escape_string 但这不工作：

  array_walk（$ array，'$ mysqli-> real_escape_string'）; 
  

出现此错误：

警告：array_walk（）期望参数2是一个有效的回调，函数'$ mysqli-> real_escape_string'没有找到或无效的函数名称在C：\wamp\www\ts.php在线69

$ mysqli 是一个有效的对象， code> $ mysqli-> real_escape_string（'anything'）。

strong>是不是可以传递对象的函数作为回调？

我知道我可以创建自己的回调函数函数并实现$ mysqli-> real_escape_string in it 我想知道是不是可以使用回调作为对象的函数？

解决方案

您可以在 php回调页面上阅读，使用：

 ＃会产生错误
 array_walk（$ array，array（$ msqli，'real_escape_string'））; 
 array_map（$ array，array（$ msqli，'real_escape_string'））; 
  

I have an array and want to apply MySQLi->real_escape_string on every member of the array through array_walk but this is not working:

array_walk($array, '$mysqli->real_escape_string');

It gives this error:

Warning: array_walk() expects parameter 2 to be a valid callback, function '$mysqli->real_escape_string' not found or invalid function name in C:\wamp\www\ts.php on line 69

$mysqli is a valid object and works fine if I do $mysqli->real_escape_string('anything') on anything else.

My Question: Is it not possible to pass object's functions as callback ? Or am I doing something wrong.

---

IMPORTANT: I know I can create my own callback function and implement $mysqli->real_escape_string in it BUT I want to know is it not possible to use callback as an object's function ?

解决方案

As you can read on php callback page, you shall use:

# produces an error
array_walk($array, array($msqli, 'real_escape_string'));
array_map($array, array($msqli, 'real_escape_string'));

这篇关于PHP回调函数不处理对象函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！