PHP preg_replace [英] PHP preg_replace

问题描述

我使用netbeans，我尝试将\替换为\\，但失败了，它无法转义\\字符.

I use netbeans, I try to replace \ with \\ but it fails , it can't escape the \\ character.

这不是Netbeans问题，而是PHP问题.

This is not a Netbeans issue , it's a PHP issue .

preg_replace('\','\\','text to \ be parsed');

有什么解决方法吗?

推荐答案

使用4个反斜杠，请不要忘记定界符:

Use 4 backslashes and please don't forget the delimiters:

echo echo preg_replace('~\\\\~','\\\\\\\\','text to \\ be parsed');

在线演示

说明::当PHP解析\\\\时，它将转义\\两次，这意味着它将变为\\，现在，当PHP将其传递给regex引擎时，它将收到表示\.

Explanation: When PHP parse \\\\ it will escape \\ two times, which means it becomes \\, now when PHP passes it to the regex engine, it will receive \\ which means \.

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