Preg Replace - E 修饰符

发布于 2024-11-08 11:10:06 字数 500 浏览 1 评论 0原文

$strpost_a = preg_replace("/\[CallName]([^]]+)\[\/CallName\]/e", getInfo('\\1',"fullname"), $strpost_a);

我总是得到这样的回报：

Parse error: syntax error, unexpected T_STRING in C:\wamp\www\-site\files\index\stream.php(88) : regexp code on line 1
Fatal error: preg_replace() [<a href='function.preg-replace'>function.preg-replace</a>]: Failed evaluating code: James -LastName Removed- in C:\wamp\www\-site-\files\index\stream.php on line 88

原文

$strpost_a = preg_replace("/\[CallName]([^]]+)\[\/CallName\]/e", getInfo('\\1',"fullname"), $strpost_a);

I always get this in return:

Parse error: syntax error, unexpected T_STRING in C:\wamp\www\-site\files\index\stream.php(88) : regexp code on line 1
Fatal error: preg_replace() [<a href='function.preg-replace'>function.preg-replace</a>]: Failed evaluating code: James -LastName Removed- in C:\wamp\www\-site-\files\index\stream.php on line 88

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凉墨 2024-11-15 11:10:06

preg_replace 的第二个参数必须始终是字符串。使用 /e 标志不会改变这一点。第二个参数应该是一个由代码组成的字符串：

$strpost_a = preg_replace(
                 "/\[CallName]([^]]+)\[\/CallName\]/e",
                 'getInfo("\\1","fullname")',
                 $strpost_a
             );

字符串 'getInfo("\\1","fullname")' 将then 进行评估。如果您不在此处将其括在引号中，则它不会由 preg_replace 执行，而是提前执行。这就是您收到错误消息的原因。

（有时更适合使用 preg_replace_callback，但可能需要特定的 getInfo_fullname 在你的情况下。）

The second parameter to preg_replace must always be a string. Using the /e flag doesn't change that. And the second parameter simply should be a string consisting of code:

$strpost_a = preg_replace(
                 "/\[CallName]([^]]+)\[\/CallName\]/e",
                 'getInfo("\\1","fullname")',
                 $strpost_a
             );

The string 'getInfo("\\1","fullname")' will then be evaluated. If you do not enclose it in quotes here, it will not be executed by preg_replace, but beforehand. That's why you got the error message.

(It's sometimes more suitable to use preg_replace_callback, but would likely require a specific getInfo_fullname in your case.)

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临风闻羌笛 2024-11-15 11:10:06

首先，您需要正确转义括号：

"/\[CallName\]([^]]+)\[\/CallName\]/e"

其次，当使用 e 修饰符时，您的替换仍然需要是字符串。然而，在反向引用被替换后，它是一个被评估为 PHP 代码的字符串。请尝试以下操作：

"getInfo('\\1', 'fullname')"

查看文档以获取有关 e 修饰符的更多详细信息

First, you need to properly escape your brackets:

"/\[CallName\]([^]]+)\[\/CallName\]/e"

Second, when using the e modifier your replacement still needs to be a string. However it is a string that is evaluated as PHP code after backreferences are substituted. Try the following: