preg_replace除了数字，字母，句号和斜杠以外的所有内容? [英] preg_replace all but numbers, letters, periods, and slash?

问题描述

我有一个正则表达式，可以除去字母以外的所有内容.数字和句点.我还如何在其中添加斜杠?

I have a regular expression that strips everything but letters. numbers, and periods. How do I also add foreslashes to it?

$targetFile = preg_replace('/[^A-Za-z0-9-.]/', '', $targetFileDirty);

推荐答案

您可以在反斜杠前面加上反斜杠-$targetFile = preg_replace('/[^A-Za-z0-9-.\/]/', '', $targetFileDirty);

You can escape the foreslash by putting a backslash before it - $targetFile = preg_replace('/[^A-Za-z0-9-.\/]/', '', $targetFileDirty);

或者，也许更好，您可以改用其他定界符，例如$targetFile = preg_replace('#[^A-Za-z0-9-./]#', '', $targetFileDirty);

Alternatively, and perhaps better, you can use different delimiters instead, e.g. $targetFile = preg_replace('#[^A-Za-z0-9-./]#', '', $targetFileDirty);

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