Regular Expressions 101

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Community Patterns

0

(?=) = Sucedido por algum conjunto de caracteres;

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

(?<=) = Precedido por algum conjunto de caracteres;

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

(?!) = Que não seja sucedido por algum conjunto de caracteres;

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

(?<!) = Que não seja precedido por algum conjunto de caracteres;

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

替换分组

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

特殊限制（环视否定）不以什么开头

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
0

Capture query test

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Latex Chemical formula

Python
Matches chemical formula written with latex, ex: H_2O, C_5H_12, Pb(NO_3)_2
Submitted by Jingjie Yang - 8 years ago
0

Latex Chemical Molecule Identifier

Python
Updated: Identifies chemical formulae written with latex
Submitted by anonymous - 8 years ago
0

Email Search Regex

PCRE (PHP <7.3)
Finds all email addresses on a page.
Submitted by anonymous - 8 years ago
0

InfixToPost

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Javascript comments!

PCRE (PHP <7.3)
Works with single and multi-line
Submitted by (: - 8 years ago
0

校验密码必须包含字母、数字和特殊字符

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
0

匹配图片title src

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
0

匹配图片title src

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Find a irregular character in file/directory names

ECMAScript (JavaScript)
Find first ocurrence of a irregular character in a file or dir name.
Submitted by anonymous - 8 years ago
0

Match 4 groups of text independent of each other

PCRE (PHP <7.3)
You want to match 4 groups of text where group 1 is exact, group 2 is anything, group 3 is exact, group 4 is anything
Submitted by anonymous - 6 years ago
0

Exclusion

PCRE (PHP <7.3)
exclude word exactly - case insensitive
Submitted by anonymous - 8 years ago
0

parse html h2-3-4 + content in custom [collapse] tags

PCRE (PHP <7.3)
[collapse] tags are replaced with html code attributes
Submitted by anonymous - 8 years ago
0

Replace bad comments

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
1...8889909192...900

Community Library Entry

0

Regular Expression
ECMAScript (JavaScript)

/
(?:\.)([a-z0-9]*)$
/
igm
Open regex in editor

Description

Parse file extension.

Submitted by Webmato - 2 years ago