What does the Unknown modifier 'c' mean in Regex?
2886
Warning: preg_replace(): Unknown modifier
85259
What is a word boundary in regex, does \b match hyphen '-'?
46974
What's the meaning of a number after a backslash in a regular expression?
52449
Java RegEx meta character (.) and ordinary dot?
127109
What does #x inside a C macro mean?
25304
Uncertainty in parenthesis
148063
Python regex - why does end of string ($ and \Z) not work with group expressions?
30206
Where and how is the _ (underscore) variable specified?
960
Unexpected behavior of rule matching a pattern
25725
What does the caret (‘^’) mean in C++/CLI?
41380
How to check if a given Regex is valid?
28966
Is gcc 4.8 or earlier buggy about regular expressions?
76193
What do the slashes mean in the character tables?
1805
Do Python regexes support something like Perl's \G?
10125
How does this regular expression work?
125564
PHP regex delimiter, what's the point?
58132
Warning: preg_match() [function.preg-match]: Unknown modifier '/'