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
No Match

/
/
gmx

Test String

Code Generator

Language

Generated Code

$re = '/# Time. (?<=\|) (?:\s+ [^(]? ) ([0-2][0-9]) (?:\s*) (:) \s* ([0-5][0-9]) (?:\s*) (-)? (?: (?:\s*) ([0-2][0-9]) (?:\s*) (:) (?:\s*) ([0-5][0-9]) )? (?= [^\)]? \s+ \|) | # Total. (?<=\| ) (?:\s+) (\d+[m]) (?=\s+\|)/mx'; $str = '# Todo | Tracker | Task | Backlog | | ----------: | :------------- | :------------ | | 00:00-00:00 | [x] Task one | [[wiki.link | | 00:00-00:00 | | | | 00:00-00:00 | | | | 00:00- | | | | | | | | 10m | | | | | | | | 00:00 | [<] Task two | [[wiki.link]] | | | [<] Task three | [[wiki.link]] | | (00:00) | [<] Task two | [[wiki.link]] | | 00:00) | [<] Task two | [[wiki.link]] | Time outside the table 00:00 that must not be selected. Group 1: `00` (timer.start.hour) Group 2: `:` (timer.start.colon) Group 3: `00` (timer.start.minute) Group 4: `-` (timer.separator) Group 5: `00` (timer.end.hour) Group 6: `:` (timer.end.colon) Group 7: `00` (timer.end.minute) Group 8: `00` (timer.total) # Alternative # Time (not supported by VS Code). #(?= # \\| \\s+ .*? # ([0-2][0-9]) \\s* (:) \\s* ([0-5][0-9]) # (?: # \\s* (-) \\s* # ([0-2][0-9]) \\s* (:) \\s* ([0-5][0-9]) # )? # .*? \\s+ \\| #) #| # Total not supported by VS Code). #(?= \\| \\s+ (\\dm) \\s+ \\| )'; preg_match_all($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