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

$re = '/^(:?(?=[1])(10{0,8})|(?=[^0])(\d{1,8})|0)\.[0-9]{1,2}$/m'; $str = '0.232 00.32 0.00 0.98 0000.23 012.12 100000000.00 900000000.00 100000990.00 10000990.00 1000990.00 100990.00 99999999.00 99999990.00 99999991.00 99999992.00 99999993.00 99999994.00 99999995.00 99999996.00 99999997.00 99999998.00 10876682.00 83957370.00 32276025.00 59955781.00 23643169.00 73365781.00 68940216.00 27380481.00 85310811.00 32140789.00 70892466.00 92364715.00 82507898.00 46090208.00 53708181.00 4048315.00 97224300.00 10173228.00 21249514.00 84097086.00 72406479.00 99146513.00 82654346.00 45603833.00 39643534.00 57667203.00 3051654.00 8585918.00 10899673.00 82252655.00 36847069.00 86911549.00 49905120.00 86506643.00 16105612.00 42483976.00 92170115.00 56836463.00 76841977.00 10424761.00 20884622.00 16893907.00 98519645.00 2948879.00 59347569.00 63834451.00 2567857.00 37988959.00 18609517.00 20113192.00 2075478.00 96205131.00 69710650.00 28645516.00 84107268.00 61884055.00 36015436.00 42563311.00 58635986.00 2480793.00 74336882.00 41176173.00 18413160.00 59682321.00 57191890.00 96251834.00 60030968.00 61135387.00 70065230.00 13392581.00 8390468.00 55089191.00 78776612.00 17223059.00 40920281.00 6370210.00 82946642.00 38724305.00 80767575.00 99605287.00 80873099.00 92898664.00 87100823.00 82275846.00 45803611.00 49676857.00 75586944.00 94267999.00 30316905.00 58347072.00 75753796.00 20573919.00 68927953.00 94569041.00 24118004.00 88094098.00 17457549.00 26246739.00 64392494.00 47575569.00 36150252.00 7189770.00 4100094.00 44339675.00 59582445.00 85882613.00 11256804.00 22164436.00 55920337.00 77480391.00 31585441.00 12774414.00 97551568.00 76149074.00 47080480.00 88334504.00 98491905.00 68809287.00 16324716.00 93007076.00 33258751.00 35125683.00 24130884.00 4169724.00 6232620.00 49965044.00 67417304.00 58001706.00 77518603.00 89975499.00 54390329.00 74155453.00 74152020.00 85448980.00 19690408.00 32537849.00 33432378.00 49452932.00 64541244.00 43688527.00 61373648.00 97445528.00 62232537.00 72155701.00 36035525.00 52292502.00 31519032.00 95036698.00 50082726.00 17168560.00 13804004.00 86670409.00 26730756.00 42631779.00 69106192.00 27412319.00 98836485.00 64170204.00 32950034.00 27440528.00 89173744.00 15759012.00 22807330.00 62047566.00 80681976.00 30695391.00 23060620.00 48895232.00 31187105.00 46121072.00 6713583.00 5040902.00 28303696.00 46404298.00 26638547.00 2632008.00 77803663.00 1127277.00 49906626.00 56716909.00 83704608.00 94019930.00 96370292.00 20567511.00 71413066.00 62390219.00 87354858.00 57632918.00 47761130.00 40375913.00 85327514.00 67332855.00 24419284.00 76857108.00 9452588.00 86339492.00 33215813.00 51064623.00 88852647.00 58800062.00 35204524.00 79816762.00 28575775.00 82306828.00 64736081.00 92197121.00 52996961.00 87654013.00 90155925.00 15699646.00 37566846.00 21278873.00 27829169.00 51044551.00 55393256.00 18921606.00 83983323.00 37809212.00 38135789.00 676063.00 65129782.00 19017803.00 16921494.00 40387770.00 1667106.00 58645222.00 93070856.00 57010047.00 38230631.00 8205896.00 80452382.00 42619255.00 60752131.00 80837257.00 51726117.00 27463823.00 39153162.00 56131179.00 42914321.00 29580329.00 59373791.00 16076937.00 63591253.00 92918539.00 52524071.00 57775194.00 79795388.00 91174373.00 84693483.00 1549640.00 59424135.00 19180100.00 17529692.00 9623172.00 7862381.00 87895427.00 67988490.00 84750839.00 43167018.00 25530866.00 23047845.00 36672140.00 34038375.00 16956096.00 22233841.00 9882482.00 58257233.00 35663170.00 96704336.00 42722991.00 30764462.00 2931045.00 84423880.00 58675904.00 3144857.00 45479805.00 97196383.00 11729991.00 83763812.00 93982824.00 11922642.00 23884299.00 88682766.00 96970396.00 99825892.00 25412354.00 68436242.00 56303289.00 6993701.00 9013235.00 94603890.00 84352437.00 53991118.00 60982535.00 15152347.00 5537021.00 84915341.00 96637202.00 42526785.00 85876786.00 97687253.00 11074340.00 71804274.00 13703272.00 2567952.00 27131241.00 96056135.00 92132319.00 62383529.00 50443727.00 53046068.00 46979522.00 77572492.00 56237806.00 40889696.00 56635158.00 45425586.00 20872608.00 63733132.00 39126911.00 82998612.00 24472118.00 1531625.00 90847589.00 57342652.00 10489844.00 35438548.00 17948065.00 79492930.00 35766008.00 10017475.00 5761735.00 71826666.00 15492970.00 80675589.00 92698101.00 75309981.00 48236099.00 90884978.00 58529637.00 17480652.00 3474128.00 31454876.00 59919674.00 68221113.00 59342936.00 44183761.00 57363319.00 6797423.00 85021527.00 33157638.00 71046224.00 43466195.00 84325310.00 43568510.00 93824989.00 62815709.00 91698514.00 34562699.00 68698266.00 91646361.00 81367895.00 36287524.00 6250205.00 36970098.00 7023234.00 35793876.00 9340146.00 25134172.00 37827444.00 93882132.00 90016962.00 14830411.00 94538263.00 15164674.00 29530713.00 56071211.00 22929785.00 81832529.00 34075558.00 1277654.00 93815353.00 21869123.00 57517278.00 96702004.00 84501360.00 29334992.00 53856206.00 34402759.00 28183024.00 31205388.00 83603291.00 78633579.00 66179587.00 85102505.00 43021394.00 60969447.00 7776528.00 35404950.00 96614203.00 63070728.00 7478374.00 80161809.00 30138416.00 26367729.00 21144833.00 55597862.00 17256275.00 8026348.00 13708754.00 98170739.00 11455012.00 6141703.00 95128658.00 26690064.00 9528113.00 1541731.00 62972948.00 6893394.00 67971647.00 77646374.00 1525184.00 19289820.00 73174085.00 86674391.00 60728894.00 42728059.00 7033290.00 30113129.00 53845760.00 460842.00 21378536.00 86243397.00 33108412.00 20587516.00 32038845.00 76171743.00 76248346.00 58558695.00 43726924.00 34850203.00 72701918.00 36165150.00 65741731.00 10844959.00 58818298.00 29954415.00 47201209.00 91065741.00 84649957.00 38125169.00 60123060.00 49673923.00 83684624.00 91785793.00 24085149.00 50756657.00 74024582.00 47881166.00 13265039.00 54853248.00 37776838.00 32518520.00 13855357.00 84354822.00 42069875.00 33024981.00 97439357.00 12229957.00 78662475.00 19912717.00 90606310.00 46002428.00 42109731.00 38668087.00 6828287.00 67855071.00 9488825.00 39613135.00 85408810.00 76816949.00 58333578.00 49786329.00 2910108.00 20333294.00 53028092.00 37199751.00 1359517.00 23854322.00 22191799.00 64707087.00 85152450.00 99187999.00 38028826.00 2434502.00 89898643.00 26376623.00 33751068.00 40025841.00 31221169.00 47479304.00 73751251.00 29576333.00 26584960.00 43655896.00 38471734.00 76822778.00 28542996.00 22674558.00 57727490.00 12802916.00 3500766.00 41838130.00 50969831.00 46481228.00 1792920.00 50489570.00 16438975.00 22905113.00 66240921.00 4782224.00 63575741.00 44334881.00 27559040.00 50315799.00 30371484.00 69134379.00 10571522.00 93946339.00 79304180.00 76216094.00 63352727.00 31434010.00 82646787.00 59205406.00 73513313.00 21669203.00 26063408.00 59283755.00 68191913.00 43535188.00 20646010.00 35940240.00 26174083.00 82173537.00 22235558.00 62053415.00 50603476.00 92918033.00 82988283.00 45081567.00 80808808.00 98204305.00 57047813.00 7602205.00 51457856.00 60756117.00 44675467.00 25904346.00 94222016.00 47262553.00 36194963.00 80828567.00 44412535.00 60663606.00 35989849.00 11028873.00 76096456.00 98140456.00 28583413.00 36115622.00 41567379.00 22193898.00 18552819.00 17599501.00 39355838.00 82493311.00 2563274.00 99992316.00 86327810.00 67779741.00 91526307.00 36530678.00 55397640.00 61283029.00 22868681.00 82399548.00 29520689.00 99115777.00 12506050.00 56987663.00 96021339.00 12683148.00 23986935.00 19389774.00 94402345.00 6838123.00 38383581.00 28554748.00 47377263.00 19397909.00 9795406.00 63275921.00 10081895.00 12502185.00 99160160.00 23166293.00 97853858.00 21461827.00 98136292.00 49615037.00 4471216.00 85005615.00 27734109.00 53473317.00 88053108.00 38500194.00 56876893.00 26880013.00 98486130.00 95378771.00 62746544.00 7702139.00 15778362.00 32743055.00 97219240.00 11065996.00 89484129.00 51286982.00 59172822.00 27903574.00 92991764.00 89542700.00 18788544.00 33775818.00 79939311.00 89504404.00 10270953.00 93183638.00 897567.00 46943004.00 64430658.00 79081777.00 36972923.00 81210096.00 14315443.00 61214263.00 15528038.00 20081870.00 29193406.00 48881051.00 64862212.00 19540258.00 85914193.00 77026862.00 93670294.00 51656276.00 46289249.00 78362841.00 57162001.00 64333689.00 59458691.00 54670761.00 39367975.00 27176980.00 22062554.00 34995679.00 8389521.00 45116095.00 30180890.00 7284118.00 59441099.00 89884341.00 77582893.00 75194986.00 73752663.00 62507383.00 83646993.00 97878949.00 87271996.00 8485823.00 81098714.00 61644178.00 16428594.00 85318980.00 82281502.00 80705845.00 73120058.00 29498530.00 87391528.00 46269511.00 10318143.00 96873996.00 68279036.00 2515321.00 16643542.00 13252833.00 17694748.00 17479906.00 18286342.00 99243553.00 90591924.00 15439280.00 50027310.00 79393253.00 94122081.00 25763315.00 51510878.00 37873060.00 48651155.00 23613409.00 33009895.00 14334514.00 75951001.00 18149897.00 87568612.00 81521934.00 37184103.00 88503933.00 36197099.00 66863679.00 37247458.00 2399583.00 16865334.00 69915570.00 89615312.00 2083265.00 31599981.00 43301039.00 92893370.00 67963599.00 99233991.00 29991417.00 18181890.00 58984313.00 98887844.00 10280993.00 35078159.00 99814967.00 45590788.00 13645730.00 35280225.00 75356103.00 43330912.00 73038639.00 14806101.00 91126698.00 26835137.00 86827154.00 55772129.00 1366407.00 90809055.00 57966715.00 22105974.00 20280301.00 58845933.00 77805346.00 10850223.00 1410917.00 92969781.00 83613197.00 68533811.00 4915171.00 52213066.00 49334815.00 50248779.00 73908805.00 91830522.00 94654525.00 84919685.00 50219525.00 43197557.00 64092147.00 77407058.00 21642423.00 73035503.00 26782806.00 63103548.00 24556139.00 94317.00 311316.00 66520425.00 22817622.00 61445900.00 7968298.00 80026967.00 70289473.00 38082018.00 70268334.00 8224983.00 22484529.00 25877263.00 54543249.00 52928939.00 62646400.00 42581437.00 35465443.00 21950833.00 56673890.00 78338483.00 55480842.00 18615837.00 61477968.00 81609623.00 28236855.00 40842945.00 39790214.00 60140688.00 8052259.00 60419262.00 91400991.00 81775217.00 93773333.00 40828479.00 4329694.00 54206991.00 71464745.00 37580278.00 22048631.00 1502871.00 63701788.00 15952812.00 60894951.00 67918358.00 6000309.00 45787644.00 85524885.00 18449660.00 90481009.00 89549621.00 69890851.00 85466643.00 94964119.00 26972302.00 42503069.00 96887995.00 67952949.00 86309896.00 9697696.00 14507445.00 5416517.00 72908292.00 50209922.00 43750594.00 24515638.00 83530465.00 55635564.00 37295320.00 575702.00 66839403.00 15277343.00 26267375.00 45992131.00 2244230.00 18310891.00 11920970.00 89523597.00 10259548.00 50036941.00 4807745.00 16905812.00 87436771.00 26166717.00 19549690.00 66703500.00 36683786.00 6941651.00 65295768.00 50181755.00 2050613.00 16087935.00 78877462.00 24479898.00 59673337.00 75276806.00 23096633.00 60537608.00 99731008.00 90272452.00 24997763.00 43465899.00 7309540.00 76909812.00 66625395.00 73021196.00 797018.00 74654526.00 3498637.00 94722788.00 63444586.00 54719863.00 57225825.00 75947503.00 43609948.00 18294266.00 68936669.00 31138820.00 55648349.00 67765242.00 86634902.00 39345775.00 73521736.00 19591373.00 39108879.00 60775341.00 52506296.00 80254194.00 99454631.00 39369913.00 42079331.00 28293865.00 33528014.00 74267914.00 211761.00 46124927.00 12673382.00 51129498.00 39151238.00 80596618.00 42569620.00 37230199.00 3318985.00 86362626.00 20032615.00 80936455.00 38284436.00 13950817.00 31108087.00 34186303.00 55525760.00 69352391.00 30979099.00 43527134.00 36758696.00 38568318.00 97835966.00 63431337.00 61785253.00 4633422.00 36421786.00 41199066.00 45953679.00 9943367.00 17060631.00 43141139.00 72978584.00 9631852.00 53263791.00 5920641.00 64409013.00 81966730.00 49940451.00 16024198.00 13843888.00 61852271.00 99084304.00 2302120.00 6309499.00 23313413.00 93707641.00 29632533.00 5311912.00 49252880.00 36264787.00 99649046.00 50997812.00 78509632.00 45576414.00 89312371.00 65537168.00 9771853.00 73396905.00 25312158.00 88650051.00 65868166.00 55961819.00 38922811.00 36512401.00 53044072.00 71276761.00 26514635.00 34527464.00 66115741.00 91355258.00 25385097.00 83991530.00 83530477.00 71675357.00 56054621.00 43511274.00 86663160.00 43948289.00 60764669.00 38017939.00 60546149.00 61608028.00 85239083.00 16002046.00 38624099.00 3566107.00'; 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