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

/
/
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

$re = '/^(1[0-5]|0[0-9]|[0-9])(?:\.([0-9]{1,2}))$/m'; $str = '11.89 16.35 15.99 16.00 6.12 7.12 8.21 9.21 06.21 07.12 08.21 09.21 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.2 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.3 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.4 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58 0.59 0.6 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.79 0.8 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.9 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.1 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.2 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.3 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.4 1.41 1.42 1.43 1.44 1.45 1.46 1.47 1.48 1.49 1.5 1.51 1.52 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.6 1.61 1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.7 1.71 1.72 1.73 1.74 1.75 1.76 1.77 1.78 1.79 1.8 1.81 1.82 1.83 1.84 1.85 1.86 1.87 1.88 1.89 1.9 1.91 1.92 1.93 1.94 1.95 1.96 1.97 1.98 1.99 2 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.1 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.2 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.3 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.39 2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 2.52 2.53 2.54 2.55 2.56 2.57 2.58 2.59 2.6 2.61 2.62 2.63 2.64 2.65 2.66 2.67 2.68 2.69 2.7 2.71 2.72 2.73 2.74 2.75 2.76 2.77 2.78 2.79 2.8 2.81 2.82 2.83 2.84 2.85 2.86 2.87 2.88 2.89 2.9 2.91 2.92 2.93 2.94 2.95 2.96 2.97 2.98 2.99 3 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.1 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.2 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 3.3 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39 3.4 3.41 3.42 3.43 3.44 3.45 3.46 3.47 3.48 3.49 3.5 3.51 3.52 3.53 3.54 3.55 3.56 3.57 3.58 3.59 3.6 3.61 3.62 3.63 3.64 3.65 3.66 3.67 3.68 3.69 3.7 3.71 3.72 3.73 3.74 3.75 3.76 3.77 3.78 3.79 3.8 3.81 3.82 3.83 3.84 3.85 3.86 3.87 3.88 3.89 3.9 3.91 3.92 3.93 3.94 3.95 3.96 3.97 3.98 3.99 4 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.1 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.2 4.21 4.22 4.23 4.24 4.25 4.26 4.27 4.28 4.29 4.3 4.31 4.32 4.33 4.34 4.35 4.36 4.37 4.38 4.39 4.4 4.41 4.42 4.43 4.44 4.45 4.46 4.47 4.48 4.49 4.5 4.51 4.52 4.53 4.54 4.55 4.56 4.57 4.58 4.59 4.6 4.61 4.62 4.63 4.64 4.65 4.66 4.67 4.68 4.69 4.7 4.71 4.72 4.73 4.74 4.75 4.76 4.77 4.78 4.79 4.8 4.81 4.82 4.83 4.84 4.85 4.86 4.87 4.88 4.89 4.9 4.91 4.92 4.93 4.94 4.95 4.96 4.97 4.98 4.99 5 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.1 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.19 5.2 5.21 5.22 5.23 5.24 5.25 5.26 5.27 5.28 5.29 5.3 5.31 5.32 5.33 5.34 5.35 5.36 5.37 5.38 5.39 5.4 5.41 5.42 5.43 5.44 5.45 5.46 5.47 5.48 5.49 5.5 5.51 5.52 5.53 5.54 5.55 5.56 5.57 5.58 5.59 5.6 5.61 5.62 5.63 5.64 5.65 5.66 5.67 5.68 5.69 5.7 5.71 5.72 5.73 5.74 5.75 5.76 5.77 5.78 5.79 5.8 5.81 5.82 5.83 5.84 5.85 5.86 5.87 5.88 5.89 5.9 5.91 5.92 5.93 5.94 5.95 5.96 5.97 5.98 5.99 6 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.1 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.2 6.21 6.22 6.23 6.24 6.25 6.26 6.27 6.28 6.29 6.3 6.31 6.32 6.33 6.34 6.35 6.36 6.37 6.38 6.39 6.4 6.41 6.42 6.43 6.44 6.45 6.46 6.47 6.48 6.49 6.5 6.51 6.52 6.53 6.54 6.55 6.56 6.57 6.58 6.59 6.6 6.61 6.62 6.63 6.64 6.65 6.66 6.67 6.68 6.69 6.7 6.71 6.72 6.73 6.74 6.75 6.76 6.77 6.78 6.79 6.8 6.81 6.82 6.83 6.84 6.85 6.86 6.87 6.88 6.89 6.9 6.91 6.92 6.93 6.94 6.95 6.96 6.97 6.98 6.99 7 7.01 7.02 7.03 7.04 7.05 7.06 7.07 7.08 7.09 7.1 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.2 7.21 7.22 7.23 7.24 7.25 7.26 7.27 7.28 7.29 7.3 7.31 7.32 7.33 7.34 7.35 7.36 7.37 7.38 7.39 7.4 7.41 7.42 7.43 7.44 7.45 7.46 7.47 7.48 7.49 7.5 7.51 7.52 7.53 7.54 7.55 7.56 7.57 7.58 7.59 7.6 7.61 7.62 7.63 7.64 7.65 7.66 7.67 7.68 7.69 7.7 7.71 7.72 7.73 7.74 7.75 7.76 7.77 7.78 7.79 7.8 7.81 7.82 7.83 7.84 7.85 7.86 7.87 7.88 7.89 7.9 7.91 7.92 7.93 7.94 7.95 7.96 7.97 7.98 7.99 8 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.1 8.11 8.12 8.13 8.14 8.15 8.16 8.17 8.18 8.19 8.2 8.21 8.22 8.23 8.24 8.25 8.26 8.27 8.28 8.29 8.3 8.31 8.32 8.33 8.34 8.35 8.36 8.37 8.38 8.39 8.4 8.41 8.42 8.43 8.44 8.45 8.46 8.47 8.48 8.49 8.5 8.51 8.52 8.53 8.54 8.55 8.56 8.57 8.58 8.59 8.6 8.61 8.62 8.63 8.64 8.65 8.66 8.67 8.68 8.69 8.7 8.71 8.72 8.73 8.74 8.75 8.76 8.77 8.78 8.79 8.8 8.81 8.82 8.83 8.84 8.85 8.86 8.87 8.88 8.89 8.9 8.91 8.92 8.93 8.94 8.95 8.96 8.97 8.98 8.99 9 9.01 9.02 9.03 9.04 9.05 9.06 9.07 9.08 9.09 9.1 9.11 9.12 9.13 9.14 9.15 9.16 9.17 9.18 9.19 9.2 9.21 9.22 9.23 9.24 9.25 9.26 9.27 9.28 9.29 9.3 9.31 9.32 9.33 9.34 9.35 9.36 9.37 9.38 9.39 9.4 9.41 9.42 9.43 9.44 9.45 9.46 9.47 9.48 9.49 9.5 9.51 9.52 9.53 9.54 9.55 9.56 9.57 9.58 9.59 9.6 9.61 9.62 9.63 9.64 9.65 9.66 9.67 9.68 9.69 9.7 9.71 9.72 9.73 9.74 9.75 9.76 9.77 9.78 9.79 9.8 9.81 9.82 9.83 9.84 9.85 9.86 9.87 9.88 9.89 9.9 9.91 9.92 9.93 9.94 9.95 9.96 9.97 9.98 9.99 10 10.01 10.02 10.03 10.04 10.05 10.06 10.07 10.08 10.09 10.1 10.11 10.12 10.13 10.14 10.15 10.16 10.17 10.18 10.19 10.2 10.21 10.22 10.23 10.24 10.25 10.26 10.27 10.28 10.29 10.3 10.31 10.32 10.33 10.34 10.35 10.36 10.37 10.38 10.39 10.4 10.41 10.42 10.43 10.44 10.45 10.46 10.47 10.48 10.49 10.5 10.51 10.52 10.53 10.54 10.55 10.56 10.57 10.58 10.59 10.6 10.61 10.62 10.63 10.64 10.65 10.66 10.67 10.68 10.69 10.7 10.71 10.72 10.73 10.74 10.75 10.76 10.77 10.78 10.79 10.8 10.81 10.82 10.83 10.84 10.85 10.86 10.87 10.88 10.89 10.9 10.91 10.92 10.93 10.94 10.95 10.96 10.97 10.98 10.99 11 11.01 11.02 11.03 11.04 11.05 11.06 11.07 11.08 11.09 11.1 11.11 11.12 11.13 11.14 11.15 11.16 11.17 11.18 11.19 11.2 11.21 11.22 11.23 11.24 11.25 11.26 11.27 11.28 11.29 11.3 11.31 11.32 11.33 11.34 11.35 11.36 11.37 11.38 11.39 11.4 11.41 11.42 11.43 11.44 11.45 11.46 11.47 11.48 11.49 11.5 11.51 11.52 11.53 11.54 11.55 11.56 11.57 11.58 11.59 11.6 11.61 11.62 11.63 11.64 11.65 11.66 11.67 11.68 11.69 11.7 11.71 11.72 11.73 11.74 11.75 11.76 11.77 11.78 11.79 11.8 11.81 11.82 11.83 11.84 11.85 11.86 11.87 11.88 11.89 11.9 11.91 11.92 11.93 11.94 11.95 11.96 11.97 11.98 11.99 12 12.01 12.02 12.03 12.04 12.05 12.06 12.07 12.08 12.09 12.1 12.11 12.12 12.13 12.14 12.15 12.16 12.17 12.18 12.19 12.2 12.21 12.22 12.23 12.24 12.25 12.26 12.27 12.28 12.29 12.3 12.31 12.32 12.33 12.34 12.35 12.36 12.37 12.38 12.39 12.4 12.41 12.42 12.43 12.44 12.45 12.46 12.47 12.48 12.49 12.5 12.51 12.52 12.53 12.54 12.55 12.56 12.57 12.58 12.59 12.6 12.61 12.62 12.63 12.64 12.65 12.66 12.67 12.68 12.69 12.7 12.71 12.72 12.73 12.74 12.75 12.76 12.77 12.78 12.79 12.8 12.81 12.82 12.83 12.84 12.85 12.86 12.87 12.88 12.89 12.9 12.91 12.92 12.93 12.94 12.95 12.96 12.97 12.98 12.99 13 13.01 13.02 13.03 13.04 13.05 13.06 13.07 13.08 13.09 13.1 13.11 13.12 13.13 13.14 13.15 13.16 13.17 13.18 13.19 13.2 13.21 13.22 13.23 13.24 13.25 13.26 13.27 13.28 13.29 13.3 13.31 13.32 13.33 13.34 13.35 13.36 13.37 13.38 13.39 13.4 13.41 13.42 13.43 13.44 13.45 13.46 13.47 13.48 13.49 13.5 13.51 13.52 13.53 13.54 13.55 13.56 13.57 13.58 13.59 13.6 13.61 13.62 13.63 13.64 13.65 13.66 13.67 13.68 13.69 13.7 13.71 13.72 13.73 13.74 13.75 13.76 13.77 13.78 13.79 13.8 13.81 13.82 13.83 13.84 13.85 13.86 13.87 13.88 13.89 13.9 13.91 13.92 13.93 13.94 13.95 13.96 13.97 13.98 13.99 14 14.01 14.02 14.03 14.04 14.05 14.06 14.07 14.08 14.09 14.1 14.11 14.12 14.13 14.14 14.15 14.16 14.17 14.18 14.19 14.2 14.21 14.22 14.23 14.24 14.25 14.26 14.27 14.28 14.29 14.3 14.31 14.32 14.33 14.34 14.35 14.36 14.37 14.38 14.39 14.4 14.41 14.42 14.43 14.44 14.45 14.46 14.47 14.48 14.49 14.5 14.51 14.52 14.53 14.54 14.55 14.56 14.57 14.58 14.59 14.6 14.61 14.62 14.63 14.64 14.65 14.66 14.67 14.68 14.69 14.7 14.71 14.72 14.73 14.74 14.75 14.76 14.77 14.78 14.79 14.8 14.81 14.82 14.83 14.84 14.85 14.86 14.87 14.88 14.89 14.9 14.91 14.92 14.93 14.94 14.95 14.96 14.97 14.98 14.99 15 15.01 15.02 15.03 15.04 15.05 15.06 15.07 15.08 15.09 15.1 15.11 15.12 15.13 15.14 15.15 15.16 15.17 15.18 15.19 15.2 15.21 15.22 15.23 15.24 15.25 15.26 15.27 15.28 15.29 15.3 15.31 15.32 15.33 15.34 15.35 15.36 15.37 15.38 15.39 15.4 15.41 15.42 15.43 15.44 15.45 15.46 15.47 15.48 15.49 15.5 15.51 15.52 15.53 15.54 15.55 15.56 15.57 15.58 15.59 15.6 15.61 15.62 15.63 15.64 15.65 15.66 15.67 15.68 15.69 15.7 15.71 15.72 15.73 15.74 15.75 15.76 15.77 15.78 15.79 15.8 15.81 15.82 15.83 15.84 15.85 15.86 15.87 15.88 15.89 15.9 15.90 15.91 15.92 15.93 15.94 15.95 15.96 15.97 15.98 15.99 16 16.01 16.02 16.03 16.04 16.05 16.06 16.07 16.08 '; $subst = "$0 = $1 + 0.$2"; $result = preg_replace($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