Regular Expressions 101

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Community Patterns

1

Extract phone number and email address from string

PCRE2 (PHP >=7.3)
Extract the phone numbers and email addresses from a string
Submitted by Mukesh Jangid - a year ago
1

Get all table from sql query string | 从SQL查询语句中获取所有表名

PCRE2 (PHP >=7.3)
Get all table from sql query string | 从SQL查询语句中获取所有表名。 WelineFramework PHP8 。
Submitted by Aiweline/秋枫雁飞 - a year ago
1

get Markdown image link and alt

PCRE2 (PHP >=7.3)
get image's link and alt in Markdown
Submitted by fgt1t5y - a year ago
1

Simple URL validation

.NET 7.0 (C#)
Validates protocol, sub-domain, domain, and top-level domain. No port number and query string parameters validation is made.
Submitted by anonymous - a year ago
1

Regex, find almost all text between html tags, for laravel translation

PCRE2 (PHP >=7.3)
Regex, find almost all text between html tags, for laravel translation
Submitted by anonymous - a year ago
1

Match URLs

PCRE2 (PHP >=7.3)
Matches most of the URLs I through at it. Did not find any ULR that it doesn't match yet.
Submitted by Dashrath Sharma - a year ago
1

Gregorian Date pattern.

PCRE2 (PHP >=7.3)
Matches Gregorian Date Pattern Completed Challenge from Codewars
Submitted by Dashrath Sharma - a year ago
1

ip address

PCRE2 (PHP >=7.3)
ip
Submitted by Giorgio - a year ago
1

Regex ejemplo grafana01

PCRE2 (PHP >=7.3)
validacion de regex
Submitted by Edson Rueda - a year ago
1

Match T-SQL view definition

PCRE2 (PHP >=7.3)
This regex matches the Transact SQL statement for selecting the database and creating a view.
Submitted by anonymous - a year ago
1

match php tag

PCRE2 (PHP >=7.3)
match php tag
Submitted by Shun Shun - a year ago (Last modified a year ago)
1

Matches All the even numbers

PCRE2 (PHP >=7.3)
Matches all the even numbers from a given input.
Submitted by Dashrath Sharma - a year ago
1

Matches All the Odd Numbers

PCRE2 (PHP >=7.3)
Matches All the Odd Numbers
Submitted by Dashrath Sharma - a year ago
1

convert any youtube video link to an embed in iframe

PCRE2 (PHP >=7.3)
supports all link formats
Submitted by 1Mouse - a year ago
1

Email Regex

PCRE2 (PHP >=7.3)
Email address: RFC 2822 Format Matches a normal email address. Does not check the top-level domain. Copied from: https://stackoverflow.com/a/16168103/4640611
Submitted by anonymous - a year ago
1

Quartz .NET Cron Schedule Validation

PCRE2 (PHP >=7.3)
Matches a list of cron expressions which are valid in the Quartz .NET library Quartz Net Cron Expression
Submitted by Michael Robertson - a year ago (Last modified a year ago)
1

Glyph name Bulgarian local form

PCRE2 (PHP >=7.3)
replace .bgr with cyr_BGR in replace string
Submitted by anonymous - a year ago
1

force download file (HTML5)

PCRE2 (PHP >=7.3)
This regex is written for a Joomla plugin. This REGEX force to DOWNLOAD à PDF file instead of showing PDF in browser
Submitted by Sébastien LHUILLIER - a year ago
1

Initializing identifiers

.NET 7.0 (C#)
Initializing identifiers
Submitted by anonymous - a year ago
1

Rust type-like ident casing

Rust
Matches built-in primitives and identifiers with casing conventionally used for type/constant names.
Submitted by Neel Yadav - a year ago
1...288289290291292...900

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}(\?s=|\/)[a-zA-Z0-9()-.?_=&;#\/]{1,256}
/
gm
Open regex in editor

Description

Udacity AI for Trading - Project 6: Analyzing Stock Sentiment from Twits ( Sentiment Analysis) needs a HTML parsering. Examples came from the actual course exercise.

Future improvements

  • I could identify, make it a group and parser each /texttext/ pattern, if necessary ← perhaps it may have some value in the future, but I am not quite sure about it

  • I could identify if the text was a result of a search pattern ?s=SSS? (SSS ← for Some Stock Symbol), so if the user was looking for something about a specific stock or not, for future improvement on training

  • I could identify the key=9* pattern, so I know the information was retrieved from a logged user into a site and not from a general search ← perhaps I should give more weight for this message

Note: as i make the text.lower() statement BEFORE processing this pattern, I can improve performance just removing CAPITAL letters. So, you can use something as:

patt_url = "https?:\/\/(www\.)?[-a-z0-9@:%._\+~#=]{1,256}\.[a-z0-9()]{1,6}(\?s=|\/)[a-z0-9()-.?_=&;#\/]{1,256}"

Submitted by Eduardo Passeto - a year ago (Last modified a year ago)