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Regular Expression
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Test String

HTML CODE


BB CODE





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Substitution
Expression Flags
ignore case (i)
global (g)
multiline (m)
extended (x)
extra (X)
single line (s)
unicode (u)
Ungreedy (U)
Anchored (A)
dup subpattern names(J)

Glry_Signature_1

When matched, recognizes certain web page html code and captures pertinent information.

Comments

Top Regular Expressions

Url checker with or without http:// or https://
Match string not containing string
Check if a string only contains numbers
Match elements of a url
Match an email address
Validate an ip address
nginx test
Match or Validate phone number
Match html tag
Blocking site with unblocked games
Match dates (M/D/YY, M/D/YYY, MM/DD/YY, MM/DD/YYYY)
Empty String
Checks the length of number and not starts with 0
all except word
Match a valid hostname
Not Allowing Special Characters
10-digit phone number with hyphens
Find any word in a list of words
Validate datetime
Person Name

Cheat Sheet

Character classes
. any character except newline
\w \d \s word, digit, whitespace
\W \D \S not word, digit, whitespace
[abc] any of a, b, or c
[^abc] not a, b, or c
[a-g] character between a & g
Anchors
^abc$ start / end of the string
\b word boundary
Escaped characters
\. \* \\ escaped special characters
\t \n \r tab, linefeed, carriage return
\u00A9 unicode escaped ©
Groups & Lookaround
(abc) capture group
\1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
Quantifiers & Alternation
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd