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How can I check the plus sign with regular expressions?

I am trying to check the plus sign with PHP and regular expressions.

Here is the code I got so far.

preg_replace('#[^-a-zA-Z0-9_&; ]#', '', $abcd)
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2 answers

You may just need to avoid the "plus" sign with a backslash: \+.

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Add + to the list.

preg_replace('#[^-a-zA-Z0-9_&; +]#', '', $abcd)
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Source: https://habr.com/ru/post/1783166/

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