Regular Expressions 101

Save & Share

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

$re = '/[a-zA-ZāīūṅñṭḍṇḷṃĀĪŪṄÑṬḌHṆḶṂ]+(?![^<>]*>)/m'; $str = '<p class="noindentbodytext"> gotamo<a name="M0.0002"></a> brāhmaṇe jiṇṇe vuḍḍhe mahallake addhagate vayoanuppatte abhivādeti vā paccuṭṭheti vā āsanena vā nimantetī’ti. tayidaṃ, bho gotama, tatheva? na hi bhavaṃ gotamo brāhmaṇe jiṇṇe vuḍḍhe mahallake addhagate vayoanuppatte abhivādeti vā paccuṭṭheti vā āsanena vā nimanteti? tayidaṃ, bho gotama, na sampannamevā"ti.</p> <p class="bodytext">"nāhaṃ taṃ, brāhmaṇa, passāmi sadevake loke samārake sabrahmake sassamaṇabrāhmaṇiyā pajāya sadevamanussāya yamahaṃ abhivādeyyaṃ vā paccuṭṭheyyaṃ vā āsanena vā nimanteyyaṃ. yañhi, brāhmaṇa, tathāgato abhivādeyya vā paccuṭṭheyya vā āsanena vā nimanteyya, muddhāpi tassa vipateyyā"ti.</p> <p class="bodytext"><a name="para3"></a><a name="para3_vin1"></a><span class="paranum">3</span>. "arasarūpo bhavaṃ gotamo"ti? "atthi khvesa, brāhmaṇa, pariyāyo yena maṃ pariyāyena sammā vadamāno vadeyya <a name="T1.0003"></a> – ‘arasarūpo samaṇo gotamo’ti. ye te, brāhmaṇa, rūparasā saddarasā gandharasā rasarasā phoṭṭhabbarasā te tathāgatassa pahīnā ucchinnamūlā tālāvatthukatā anabhāvaṃkatā <span class="note">[anabhāvakatā (sī.) anabhāvaṃgatā (syā.)]</span> āyatiṃ anuppādadhammā. ayaṃ kho, brāhmaṇa, pariyāyo yena maṃ pariyāyena sammā vadamāno vadeyya – ‘arasarūpo samaṇo gotamo’ti, no ca kho yaṃ tvaṃ sandhāya vadesī"ti.</p> <p class="bodytext"><a name="para4"></a><a name="para4_vin1"></a><span class="paranum">4</span>. "nibbhogo bhavaṃ gotamo"ti? "atthi khvesa, brāhmaṇa, pariyāyo yena maṃ pariyāyena sammā vadamāno vadeyya – ‘nibbhogo samaṇo gotamo’ti. ye te, brāhmaṇa, rūpabhogā saddabhogā gandhabhogā rasabhogā phoṭṭhabbabhogā te tathāgatassa pahīnā ucchinnamūlā tālāvatthukatā anabhāvaṃkatā āyatiṃ anuppādadhammā. ayaṃ kho, brāhmaṇa, pariyāyo yena maṃ pariyāyena sammā vadamāno vadeyya – ‘nibbhogo samaṇo gotamo’ti, no ca kho yaṃ tvaṃ sandhāya vadesī"ti.</p> <p class="bodytext"><a name="para5"></a><a name="para5_vin1"></a><span class="paranum">5</span>. "akiriyavādo <a name="V0.0003"></a> bhavaṃ gotamo"ti? "atthi khvesa, brāhmaṇa, pariyāyo yena maṃ pariyāyena sammā vadamāno vadeyya – ‘akiriyavādo samaṇo gotamo’ti. ahañhi, brāhmaṇa, akiriyaṃ vadāmi</p> '; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php