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

/
/
gm

Test String

Code Generator

Language

Generated Code

$re = '/([^:]+):([\w\d-\.]+)/m'; $str = 'PatientID:2025 PlanName:p1b1d1a PlanUID:1.2.246.352.71.5.78480665410.384135.20151228085931 BeamNumber:2 BeamName:CCW OriginalMU:1995.39040729 LoggingScale:IEC1217 X1(Cms):-2.50 X2(Cms):+2.20 Y1(Cms):-2.60 Y2(Cms):+2.50 GantryRotationAngle(deg):87.73 Energy:6x MU1:1007.63 MU2:1009.05 RadiationTime(mins):1.6807 DoseRate(MU/min):598.32 PFNHighVoltagePowerSupplyCurrent(A):1.908875 PFNActualVoltage(KV):18.21791 RFDriverVoltage(V):4.365 RFForwardPower(W):1.516418 AFCError(V):-0.000601778 GunCurrent(A):0.3430939 GunHighVoltage(V):-14965 GunGridVoltage(V):97.55565 GunFilamentStepVoltage(V):5.300003 GunFilamentVoltage(V):5.405273 BendMagnetCurrent(A):16.18042 BendMagnetVoltage(V):2.283325 AcceleratorSolenoidCurrent(A):34.95636 KlystronSolenoidCurrent(A):34.95789 RadialSymmetry(%):0.00045321 TransverseSymmetry(%):0.00044355 TargetCurrent(nC):315.4927 BuncherRadialCurrent(A):0.005020142 BuncherTransverseCurrent(A):-0.06005859 AngleRadialCurrent(A):0.005279541 AngleTransverseCurrent(A):0.06143188 PositionRadialCurrent(A):-0.8885803 PositionTransverseCurrent(A):-0.5808258 Trim:(A)-0.06399536 AcceleratorVacionCurrent(uA):0.009002686 Positive5Vdc:4.993916 Positive24Vdc:24.4706 AnalogNegative5Vdc:5.054981 AnalogPositive5Vdc:4.97241 Negative12Vdc:12.24357 Positive3Vdc:3.303525 NodePowerSupplyVoltage(V):24.58121 WaterLevel:Normal CityWaterTemperature(degC):20.54332 InternalWaterSupplyTemperature(degC):40.51909 GasPressure(PSI):32.3421 '; preg_match_all($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