如何更正此非法字符串偏移量? [英] How do I correct this Illegal String Offset?

问题描述

我在第 32 行收到此错误警告:非法字符串偏移量‘类型’在/home/mysite/public_html/wp-content/themes/evento/lib/php/extra.class.php"

I am receiving this error "Warning: Illegal string offset 'type' in /home/mysite/public_html/wp-content/themes/evento/lib/php/extra.class.php on line 32"

并且我意识到文件中的这部分代码是错误的，但是我在 PHP 方面还不是很好，我想知道是否有人可以帮助我重新编写这部分以消除错误.谢谢！(错误从第 32 行开始，这是下面 if 语句的开头)

and I realized this section of code in the file is wrong, however I'm not that great in PHP yet and I am wondering if someone can help me re-write this section to eliminate the error. Thanks! (the error starts on line 32 which is the beginning of the if statement below)

代码如下:

/* new version */
    function get_attachment_struct( $inputs ){
        $attach = array();

    if( $inputs['type'] == 'attach' ){ 
            $name = $inputs['name'];
            $attach = array(
                0 => array(
                    'name' => $name,
                    'type' => 'text',
                    'label' =>  'Attachment URL',
                    'lvisible' => false,
                    'upload' => true,
                ),
                1 => array(
                    'name' => $name .'_id',
                    'type' => 'hidden',
                    'upload' => true
                ),
            );

            if( isset( $inputs[ 'classes' ] ) ){
                $attach[0]['classes'] = $inputs[ 'classes' ];
                $attach[1]['classes'] = $inputs[ 'classes' ] . '_id';
            }
        }
        return $attach;
    }

    /* new version */

推荐答案

if ($inputs['type'] == 'attach') {

代码是有效的，但它要求函数参数 $inputs 是一个数组.使用 $inputs['type'] 时的非法字符串偏移"警告意味着该函数正在传递一个字符串而不是数组.(然后由于字符串偏移量是一个数字，'type' 不合适.)

The code is valid, but it expects the function parameter $inputs to be an array. The "Illegal string offset" warning when using $inputs['type'] means that the function is being passed a string instead of an array. (And then since a string offset is a number, 'type' is not suitable.)

所以理论上问题出在其他地方，代码的调用者没有提供正确的参数.

So in theory the problem lies elsewhere, with the caller of the code not providing a correct parameter.

但是，此警告消息是 PHP 5.4 的新增内容.如果发生这种情况，旧版本没有警告.他们会默默地将 'type' 转换为 0，然后尝试获取字符串的字符 0(第一个字符).因此，如果这段代码应该可以工作，那是因为滥用这样的字符串不会导致对 PHP 5.3 及以下版本的任何抱怨.(很多老PHP代码升级后都遇到过这个问题.)

However, this warning message is new to PHP 5.4. Old versions didn't warn if this happened. They would silently convert 'type' to 0, then try to get character 0 (the first character) of the string. So if this code was supposed to work, that's because abusing a string like this didn't cause any complaints on PHP 5.3 and below. (A lot of old PHP code has experienced this problem after upgrading.)

您可能希望通过检查调用代码来调试为什么函数被赋予一个字符串，并通过执行 var_dump($inputs); 来找出它的值代码>在函数中.但是，如果您只是想关闭警告以使其表现得像 PHP 5.3，请将行更改为:

You might want to debug why the function is being given a string by examining the calling code, and find out what value it has by doing a var_dump($inputs); in the function. But if you just want to shut the warning up to make it behave like PHP 5.3, change the line to:

if (is_array($inputs) && $inputs['type'] == 'attach') {

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