Regular Expressions 101

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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

/
/
iug

Test String

Code Generator

Generated Code

const regex = /{(if|foreach)\s*([^}]*[^}\s])\s*}/iug; // Alternative syntax using RegExp constructor // const regex = new RegExp('{(if|foreach)\\s*([^}]*[^}\\s])\\s*}', 'iug') const str = `{include file = "include/common/head.tpl" } {include file = "include/common/header.default.tpl" } {if \$content['outer']['container']['centered'] }hvcenterContainer hvcenter long{/if} {if !\$content['inner']['payment']['payout']} {if isset(\$content['inner']['pType']) }{\$content.inner.pType}{else}1{/if} {language data-case="title" }31001001{/language} {language data-case="title" }31001002{/language} {language data-case="title" }31001003{/language} {language}34012002{/language} {language data-case="title" data-sublang="31001001" }21000033{/language} {language}34012003{/language} {language data-case="title" data-sublang="31001002" }21000033{/language} {language}34012004{/language} {language data-case="title" data-sublang="31001003" }21000033{/language} {language data-case="title" }31002001{/language} {language data-case="title" }31002002{/language} {language data-case="title" }31002003{/language} {language data-case="title" }31002004{/language} {language data-case="title" }31002005{/language} {language data-case="title" }31002006{/language} {if \$content['inner']['pType'] == 3 && \$content['inner']['step']['count']['software'] >= 3 }active{/if} {language}36000005{/language} {language data-case="title" }32013010{/language} {language}34012005{/language} {include file = "include/project/auth.tpl" } {language data-case="title" }21000001{/language} {if \$content['inner']['pType'] == 1 && \$content['inner']['step']['count']['default'] >= 3 || \$content['inner']['pType'] == 2 && \$content['inner']['step']['count']['offer'] >= 3}active{/if} {language data-case="title" }36000005{/language} {language data-case="title" }32013003{/language} {include file = "include/project/text.tpl" } {language data-case="title" }21000002{/language} {if \$content['inner']['pType'] == 1 && \$content['inner']['step']['count']['default'] >= 4 || \$content['inner']['pType'] == 2 && \$content['inner']['step']['count']['offer'] >= 4 }active{/if} {language data-case="title" }36000005{/language} {language data-case="title" }32013004{/language} {language}34012006{/language} {language data-case="title" }23005003{/language} {\$content.inner.comment} {language data-case="title" }21000007{/language} {language data-case="title" }21000001{/language} {if \$content['inner']['pType'] == 1 && \$content['inner']['step']['count']['default'] >= 5 || \$content['inner']['pType'] == 2 && \$content['inner']['step']['count']['offer'] >= 5 || \$content['inner']['pType'] == 3 && \$content['inner']['step']['count']['software'] >= 4 }active{/if}{language}36000005{/language} {language data-case="title" }32013005{/language} {language}34012007{/language} {language data-case="title" }23000005{/language} {language data-case="title" }30000003{/language} {foreach \$content.inner.sourceLanguage.array as \$key => \$value } {\$value} {/foreach} {language data-case="title" }23000006{/language} {if isset(\$content['inner']['category']['array']) && is_array(\$content['inner']['category']['array']) && count(\$content['inner']['category']['array']) > 0} {foreach \$content.inner.category.array as \$key => \$value } {\$value.name} {/foreach} {/if} {language data-case="title" }23000007{/language} {if isset(\$content['inner']['targetLanguage']['array']) && is_array(\$content['inner']['targetLanguage']['array']) && count(\$content['inner']['targetLanguage']['array']) > 0} {foreach \$content.inner.targetLanguage.array as \$key => \$value } {\$value.name} {/foreach} {/if} {if isset(\$content['inner']['projectLanguages']['array']) && is_array(\$content['inner']['projectLanguages']['array']) && count(\$content['inner']['projectLanguages']['array']) > 0} {foreach \$content.inner.projectLanguages.array as \$key => \$value } {\$value.name} {/foreach} {/if} {language data-case="title" }21000001{/language} {if \$content['outer']['status']['visibility'] || \$content['outer']['status']['filter'] } {language}36000005{/language} {language data-case="title" }32013006{/language} {language}34012008{/language} {include file = "include/project/filter.tpl" } {language data-case="title" }21000007{/language} {language data-case="title" }21000001{/language} {/if} {language data-case="title" }32013001{/language} Toplam kelime sayısı : {if isset(\$content['inner']['information']['count']['word']) }{\$content.inner.information.count.word}{else}-{/if} {language data-case="title" }39002002{/language}{language data-case="title" }39002004{/language} {if isset(\$content['inner']['summary']['time']) }{\$content.inner.summary.time}{else}-{/if} {language data-case="title" }39002003{/language}{language data-case="title" }39002005{/language} {if isset(\$content['inner']['summary']['amount']['total']) }{\$content.inner.summary.amount.total}{else}0{/if} {language data-case="title" }39002006{/language} {if isset(\$content['inner']['summary']['amount']['text']['count']) }{\$content.inner.summary.amount.text.count}{else}0{/if}&nbsp; {language data-case="title" }39002007{/language} {if isset(\$content['inner']['summary']['amount']['discount']['count']) }{\$content.inner.summary.amount.discount.count}{else}0{/if}&nbsp; {language data-case="title" }39002008{/language} {if isset(\$content['inner']['summary']['amount']['tax']['count']) }{\$content.inner.summary.amount.tax.count}{else}0{/if}&nbsp; {language data-case="title" }39002009{/language} {if isset(\$content['inner']['summary']['amount']['gap']['count']) }{\$content.inner.summary.amount.gap.count}{else}0{/if}&nbsp; {language data-case="title" }32013002{/language} {language}39002010{/language} : - {language data-case="title" }39002011{/language} - {language data-case="title" }39002012{/language} - {if \$content['outer']['status']['adress'] } {language}36000005{/language} {language data-case="title" }32013007{/language} {include file = "include/miscellaneous/adress.tpl" } {language data-case="title" }21000001{/language} {/if} {language}36000005{/language} {language data-case="title" }32013012{/language} {include file = "include/project/creditcard.tpl" } {language data-case="title" }21000001{/language} {if \$content['inner']['payment']['status'] && isset(\$content['inner']['payment']['response']) } {\$content.inner.payment.response} {/if} {language}36000005{/language} {include file = "include/miscellaneous/payment.tpl" } {language}36000005{/language} {language data-case="title" }32013013{/language} {\$content.inner.message} {language data-case="title" }21000034{/language} {else} {language data-case="title" }32013011{/language} {language}34012010{/language} {language data-case="first" data-variable="'{\$content.inner.fileCount}'" }39002023{/language} {language data-variable="'{\$content.inner.information.count.word}'" }39002024{/language} {language data-case="first" }39002006{/language} {language data-variable="'{\$content.inner.projectLanguages.count}'" }39002026{/language} {if \$content['inner']['summary']['amount']['text']['status']} {language data-case="first" }39002006{/language} {\$content.inner.summary.amount.text.count} {/if} {if \$content['inner']['summary']['amount']['discount']['status']} {language data-case="first" }39002007{/language} {\$content.inner.summary.amount.discount.count} {/if} {if \$content['inner']['summary']['amount']['tax']['status']} {language data-case="first" }39002008{/language} {\$content.inner.summary.amount.tax.count} {/if} {if \$content['inner']['summary']['amount']['gap']['status']} {language data-case="first" }39002009{/language} {\$content.inner.summary.amount.gap.count} {/if} {language data-case="first" }39002027{/language} {\$content.inner.summary.amount.total} {language data-case="title" }21000020{/language} {language data-case="title" }21000021{/language} {/if} {include file = "include/common/footer.long.tpl" } {include file = "include/common/foot.tpl" }`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions