Regular Expressions 101

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  • PCRE2 (PHP >=7.3)
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/
^..(.$|.[3Gw!^)]|$)|G..\)
/
gm
1st Alternative
^..(.$|.[3Gw!^)]|$)
^ asserts position at start of a line
. matches any character (except for line terminators)
. matches any character (except for line terminators)
1st Capturing Group
(.$|.[3Gw!^)]|$)
1st Alternative
.$
.
matches any character (except for line terminators)
{7} matches the previous token exactly 7 times
$ asserts position at the end of a line
2nd Alternative
.[3Gw!^)]
. matches any character (except for line terminators)
Match a single character present in the list below
[3Gw!^)]
3Gw!^) matches a single character in the list 3Gw!^) (case sensitive)
3rd Alternative
$
$ asserts position at the end of a line
2nd Alternative
G..\)
G matches the character G literally (case sensitive)
.
matches any character (except for line terminators)
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
.
matches any character (except for line terminators)
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
\) matches the character ) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String