Regular Expression
most used
preg_quote
description
preg_quote() takes $str and puts a backslash in front of every character that is part of the regular expression syntax. This is useful if you have a run-time string that you need to match in some text and the string may contain special regex characters.
The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | : -
declaration of preg_quote
string preg_quote ( string $str [, string $delimiter ] )
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