regex.md

Regex Gists

Match exact string

Uses start of line (^) and end of line ($)

^searchvalue$

Pattern Matching

One or more ASCII characters

[a-zA-Z0-9]+

or zero or more

[a-zA-Z0-9]*

3 to 5 numbers

[0-9]{3,5}

Negative regex (no numbers)

[^0-9]

Placeholders

^/name/([a-zA-Z]+)/$ index.php?name=$1

Examples

Phone Number

[2-9][0-9]{2}-[0-9]{4}

Most Email Addresses

^[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$

URL Routing Gists