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

Code Generator

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?m)matei 140 for ").unwrap(); let string = "<?php $days = 7; // Eine Woche $activity = \"Laufen\"; // Trainingsart $duration = 30; // Minuten pro Tag for ($day = 1; $day <= $days; $day++) { echo \"Am Tag $day bist du $duration Minuten $activity gewesen.<br>\"; } $activities = [\"Laufen\", \"Schwimmen\", \"Radfahren\", \"Yoga\", \"Krafttraining\"]; $motivation = 5; // Skala 1-10 $goal = \"fit werden\"; // Ziel $duration = 30; // Minuten pro Tag $days = 7; // Eine Woche for ($day = 1; $day <= $days; $day++) { $activity = $activities[($day-1)%count($activities)]; echo \"<br>Tag $day: Heute machst du $duration Minuten $activity, Motivation: $motivation/10, Ziel: $goal.\"; $motivation++; if($day == $days){ echo \"<br>\"; } } function wochenplan($activities, $days, $dauerProTag) { $gesamt = 0; for ($i = 1; $i <= $days; $i++) { $activity = $activities[array_rand($activities)]; echo \"<br> Tag $i: $activity für $dauerProTag Minuten.\"; $gesamt += $dauerProTag; if($i == $days){ echo \"<br><br>\"; } } return $gesamt; } $activities = [\"Laufen\", \"Schwimmen\", \"Radfahren\", \"Yoga\", \"Krafttraining\"]; $gesamt = wochenplan($activities, 7, 30); echo \"Gesamtzeit: $gesamt Minuten.\"; "; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/