Unknown modifier in regular expression
2886
Warning: preg_replace(): Unknown modifier
124258
How do you match one of two words in a regular expression?
115402
Fixing Catastrophic Backtracking in Regular Expression
10632
sed regular expression behaving differently than in vim and perl?
1805
Do Python regexes support something like Perl's \G?
141606
How can I recognize an evil regex?
93958
How to match hyphens with Regular Expression?
142860
Why is this regex allowing a caret?
13586
Why do regex constructors need to be double escaped?
90532
Regex matches but shouldn't
120978
Difference between regex [A-z] and [a-zA-Z]
130919
Regular expression for letters, numbers and - _
45334
How can I debug a regular expression in Python?
104414
JavaScript regular expressions and sub-matches
114360
What do ^ and $ mean in a regular expression?
28459
How do regular expressions differ from wildcards used to filter files
126141
Regular expression to match a word or its prefix