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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

$re = '/^(?=.*\bDATA1="(?<d1>[^"]+)"\h*)?(?=.*\bDATA2="(?<d2>[^"]+)"\h*)?(?=.*\bDATA3="(?<d3>[^"]+)"\h*)?(?=.*\bDATA4="(?<d4>[^"]+)"\h*)?(?=.*\bDATA5="(?<d5>[^"]+)"\h*)?.*/m'; $str = 'DATA1="8DE" DATA2="322" DATA3="20" DATA4="19.99" DATA5="0.01" DATA1="FE4" DATA2="222" DATA4="400" DATA3="400" DATA5="0.00" DATA1="CE3" DATA2="444" DATA4="60" DATA5="0.00" DATA3="60" DATA1="MME" DATA3="20" DATA4="20" DATA5="0.00" DATA2="667" DATA4="30" DATA3="30" DATA5="0.00" DATA1="MH4"'; $subst = "${d1}\t\t${d2}\t\t${d3}\t\t${d4}\t\t${d5}"; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;

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