What are some common pitfalls when working with regular expressions in PHP?

One common pitfall when working with regular expressions in PHP is not properly escaping special characters. To avoid this issue, use the preg_quote() function to escape any special characters in the regular expression pattern. 

$pattern = '/[.*+?^${}()|\[\]\\]/';
$escaped_pattern = preg_quote($pattern, '/');

Keywords

regex PHP syntax errors pattern matching preg_match

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