php preg_replace 除了数字、字母、句点和斜线之外的所有内容？
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preg_replace all but numbers, letters, periods, and slash?
提问by user547794
I have a regular expression that strips everything but letters. numbers, and periods. How do I also add foreslashes to it?
我有一个正则表达式，可以去除除字母以外的所有内容。数字和句号。我如何还添加前斜杠？
$targetFile = preg_replace('/[^A-Za-z0-9-.]/', '', $targetFileDirty);
回答by mikel
You can escape the foreslash by putting a backslash before it - $targetFile = preg_replace('/[^A-Za-z0-9-.\/]/', '', $targetFileDirty);
您可以通过在前斜杠之前放置反斜杠来逃避前斜杠 - $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);
或者，也许更好，您可以使用不同的分隔符，例如 $targetFile = preg_replace('#[^A-Za-z0-9-./]#', '', $targetFileDirty);
回答by Toto
To be unicode compatible you can use:
要与 unicode 兼容，您可以使用：
$targetFile = preg_replace('#[^\pL\pN./-]+#', '', $targetFileDirty);
回答by Christopher
Simply add an escaped slash: [^A-Za-z0-9-.\\/]
只需添加一个转义斜线： [^A-Za-z0-9-.\\/]
