Regular Expressions 101

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/
\$([^{("\\'\/])([a-zA-Z0-9_]*)([^}\/ \t'"\n.\]:(=\\-]*)
/
gm
\$ matches the character $ with index 3610 (2416 or 448) literally (case sensitive)
1st Capturing Group
([^{("\\'\/])
Match a single character not present in the list below
[^{("\\'\/]
{("
matches a single character in the list {(" (case sensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case sensitive)
' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
2nd Capturing Group
([a-zA-Z0-9_]*)
Match a single character present in the list below
[a-zA-Z0-9_]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)
A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
_ matches the character _ with index 9510 (5F16 or 1378) literally (case sensitive)
3rd Capturing Group
([^}\/ \t'"\n.\]:(=\\-]*)
Match a single character not present in the list below
[^}\/ \t'"\n.\]:(=\\-]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
} matches the character } with index 12510 (7D16 or 1758) literally (case sensitive)
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
\t matches a tab character (ASCII 9)
'"
matches a single character in the list '" (case sensitive)
\n matches a line-feed (newline) character (ASCII 10)
. matches the character . with index 4610 (2E16 or 568) literally (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
:(=
matches a single character in the list :(= (case sensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case sensitive)
- matches the character - with index 4510 (2D16 or 558) 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

Substitution

Processing...