^((?!proposed_).)*((project|task)_details) matches: project_details task_details...

This expression matches human genomic coordinates, similat to those being used by genome browsers (e.g. the UCSC Genome Browser). It can match: chromosome, chromosome start, chromosome start end, chromosome start end reference sequence, chromosome start end reference sequence alternative sequence. T...

This expression escapes characters, which have a special meaning in regex, like .?[]/ and so on. Use it to transform a string that you want to use literally in another regex.

Regex to match an IPv4 address at beginning

URL MATCH

Allows either a number (e.g. "1", "1.01") or a range (e.g. "1-2", "1.0 - 1.3"). Also allows whitespace on either side of the numbers.

Tests a numeric input to be between 0,00 < input <= 100,00. Decimals are optional but have at max 2 places.

Check shortcode

IPv4 Address Input

Eircode validation for new postcodes identifiers in Republic of Ireland. Case-insensetive for easier user input. Added optional space separator to follow same pattern as in UK post codes and in examples used in eircode spec.

It won't match single line comments like this one: //* This comment won't be match */ ^ see the double / Works in PHP without the g modifier.

Matches a CSS @media selector, matches outer {} curly brackets, works with every CSS code, minified too.

PHP Basic coding standard Naming Convension pattern: /^\pL_*$/

Captures a palindrome of 9 digits or less