RegularRegExpressionsEx101
Regular Expression
v1
No Match
/
/
g
Substitution
Code Generator
Generated Code
$re = '/(\d+)\s*(?=((?!\)).)*\(|[^()]*$)/'; $str = '1Hello2Hai (in 2:3) 3hi 4 bye'; $subst = '\\n$1 '; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php