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 = '/^(?:[a-zA-Z0-9+\/=-]{1,76}[\r|\n|\r\n]?)+/m'; $str = ' Login Register PHP Classes File: test/sample/message.eml Search Search Search All class groups All class groups Latest entries Latest entries Top 10 charts Top 10 charts Blog Blog Forums Forums Shop Shop Help Help Recommend this page to a friend! Classes of Manuel Lemos > PHP MIME Email Message Parser > test/sample/message.eml > Download File: test/sample/message.eml Role: Auxiliary data Content type: text/plain Description: Sample MIME message file used by the example script Class: PHP MIME Email Message Parser Decode MIME e-mail messages Author: By Manuel Lemos Last change: Date: 14 years ago Size: 9,051 bytes Contents Class file image Download Return-Path: <mlemos@acm.org> To: Manuel Lemos <mlemos@linux.local> Subject: Testing Manuel Lemos\' MIME E-mail composing and sending PHP class: HTML message From: mlemos <mlemos@acm.org> Reply-To: mlemos <mlemos@acm.org> Sender: mlemos@acm.org X-Mailer: http://www.phpclasses.org/mimemessage $Revision: 1.63 $ (mail) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="652b8c4dcb00cdcdda1e16af36781caf" Message-ID: <20050430192829.0489.mlemos@acm.org> Date: Sat, 30 Apr 2005 19:28:29 -0300 --652b8c4dcb00cdcdda1e16af36781caf Content-Type: multipart/related; boundary="6a82fb459dcaacd40ab3404529e808dc" --6a82fb459dcaacd40ab3404529e808dc Content-Type: multipart/alternative; boundary="69c1683a3ee16ef7cf16edd700694a2f" --69c1683a3ee16ef7cf16edd700694a2f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable This is an HTML message. Please use an HTML capable mail program to read this message. --69c1683a3ee16ef7cf16edd700694a2f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <html> <head> <title>Testing Manuel Lemos\' MIME E-mail composing and sending PHP class: H= TML message</title> <style type=3D"text/css"><!-- body { color: black ; font-family: arial, helvetica, sans-serif ; backgroun= d-color: #A3C5CC } A:link, A:visited, A:active { text-decoration: underline } --></style> </head> <body> <table background=3D"cid:4c837ed463ad29c820668e835a270e8a.gif" width=3D"100= %"> <tr> <td> <center><h1>Testing Manuel Lemos\' MIME E-mail composing and sending PHP cla= ss: HTML message</h1></center> <hr> <P>Hello Manuel,<br><br> This message is just to let you know that the <a href=3D"http://www.phpclas= ses.org/mimemessage">MIME E-mail message composing and sending PHP class</a= > is working as expected.<br><br> <center><h2>Here is an image embedded in a message as a separate part:</h2>= </center> <center><img src=3D"cid:ae0357e57f04b8347f7621662cb63855.gif"></center>Than= k you,<br> mlemos</p> </td> </tr> </table> </body> </html> --69c1683a3ee16ef7cf16edd700694a2f-- --6a82fb459dcaacd40ab3404529e808dc Content-Type: image/gif; name="logo.gif" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="logo.gif" Content-ID: <ae0357e57f04b8347f7621662cb63855.gif> R0lGODlhlgAjAPMJAAAAAAAA/y8vLz8/P19fX19f339/f4+Pj4+Pz7+/v/////////////////// /////yH5BAEAAAkALAAAAACWACMAQwT+MMlJq7046827/2AoHYChGAChAkBylgKgKClFyEl6xDMg qLFBj3C5uXKplVAxIOxkA8BhdFCpDlMK1urMTrZWbAV8tVS5YsxtxmZHBVOSCcW9zaXyNhslVcto RBp5NQYxLAYGLi8oSwoJBlE+BiSNj5E/PDQsmy4pAJWQLAKJY5+hXhZ2dDYldFWtNSFPiXssXnZR k5+1pjpBiDMJUXG/Jo7DI4eKfMSmxsJ9GAUB1NXW19jZ2tvc3d7f4OHi2AgZN5vom1kk6F7s6u/p m3Ab7AOIiCxOyZuBIv8AOeTJIaYQjiR/kKTr5GQNE3pYSjCJ9mUXClRUsLxaZGciC0X+OlpoOuQo ZKdNJnIoKfnxRUQh6FLG0iLxIoYnJd0JEKISJyAQDodp3EUDC48oDnUY7HFI3wEDRjzycQJVZCQT Ol7NK+G0qgtkAcOKHUu2rNmzYTVqRMt2bB49bHompSchqg6HcGeANSMxr8sEa2y2HexnSEUTuWri SSbkYh7BgGVAnhB1b2REibESYaRoBgqIMYx59tFM9AvQffVG49P5NMZkMlHKhJPJb0knmSKZ6kSX JtbeF3Am7ocok6c7cM7pU5xcXiJJETUz16qPrzEfaFgZpvzn7h86YV5r/1mxXeAUMVyEIpnVUGpN RlG2ka9b3lP3pm2l6u7P+l/YLj3+RlEHbz1C0kRxSITQaAcilVBMEzmkkEQO8oSOBNg9SN+AX6hV z1pjgJiAhwCRsY8ZIp6xj1ruqCgeGeKNGEZwLnIwzTg45qjjjjz2GEA5hAUp5JBEFmnkkSCoWEcZ X8yohZNK1pFGPQS4hx0qNSLJlk9wCQORYu5QiMd7bUzGVyNlRiOHSlpuKdGEItHQ3HZ18beRRyws YSY/waDTiHf/tWlWUBAJiMJ1/Z0XXU7N0FnREpKM4NChCgbyRDq9XYpOplaKopN9NMkDnBbG+UMC QwLWIeaiglES6AjGARcPHCWoVAiatcTnGTABZoLPaPG1phccPv366mEvWEFSLnj+2QaonECwcJt/ e1Zw3lJvVMmftBdVNQS3UngLCA85YHIQOy6JO9N4eZW7KJwtOUZmGwOMWqejwVW6RQzaikRHX3yI osKhDAq8wmnKSmdMwNidSOof9ZG2DoV0RfTVmLFtGmNk+CoZna0HQnPHS3AhRbIeDpqmR09E0bsu soeaw994z+rwQVInvqLenBftYjLOVphLFHhV9qsnez8AEUbQRgO737AxChjmyANxuEFHSGi7hFCV 4jxLst2N8sRJYU+SHiAKjlmCgz2IffbLI5aaQR71hnkxq1ZfHSfKata6YDCJDMAQwY7wOgzhjxgj VFQnKB5uX4mr9qJ79pann+VcfcSzsSCd2mw5scqRRvlQ6TgcUelYhu75iPE4JejrsJOFQAG01277 7bjnrvvuvPfu++/ABy887hfc6OPxyCevPDdAVoDA89BHL/301Fdv/fXYZ6/99tx3Pz0FEQAAOw== --6a82fb459dcaacd40ab3404529e808dc Content-Type: image/gif; name="background.gif" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="background.gif" Content-ID: <4c837ed463ad29c820668e835a270e8a.gif> R0lGODlh+wHCAPMAAKPFzKLEy6HDyqHCyaDByJ/Ax56/xp2+xZ28xJy7w5u6wpq5wZm4wJm3v5i2 vpe1vSwAAAAA+wHCAEME/hDISau9OOvNu/9gKI5kaZ5oqq5s675wLM90bd94ru987//AoHBILBqP yKRyyWw6n9CodEqtWq+gwSHReHgfjobY8X00FIc019tIHAYS7dqcQCDm3vC4fD4QAhUBBFsMZF8O hnkLCAYFW11tb1iTlJWWOXJdZZtmC24Eg3hgYntfbXainJ2fgBSZbG5wFAG0E6+RoAZ3CbwJCgya p3cMbAyevQcFAgMGCcRmxr1uyszOxQq+wF4MdcPFx7zJApfk5eYhr3SSGemRsu3dc+4iAqELhZwO 0X6hkHUHCBRoGtUg0RkEAAUeKhhGAcICBQIODIPooIEBzCTmKcjGYSNd/go3VvQo65zJkyhTqlzJ sqXLlzBjypxJs6bNmzhz6tzJs6fPn0CDCh1KtKjRo0iTKl3KtKnTp1CXBhhAwECaq1gPNCIwANDU qmkMcG311apWULmyZt3alcPXAma1FgAlgCxVq2LbRt3LF0Y7hwWoEjLEDZUmff8AOjMkTB5gwYu3 JbhIQUDEZw+4+aE1aNc0R2vcDYjoDBgpBoUDj95yzzRqbH7qgW4t5vUnAfVAoj7NwOOf1QloN7Ad u1Xf41b+IlCNsa6rR7DWwTPccTnG5sYvCEKwgPGiZI64A9OsK/Q/BM/0YfuFz13VOwsULLhHps+f 98Hl0zeDRk0X9Qih/vLPWPjFN197aPyB3IJVBLDMdc5t4OB1A0QowYQQ0vIgdilgyGEgG1roYV0j GufhhyBSWGF2s2yIYosqWsjgjDTWaOONOOao44489ujjj0AGKeSQRBZp5JFIJqnkkkw26eSTUMJU llpYseXVXWGNdSGWZ6EVF5VWukUVXFdtRUCEU+bFYpRslqNcYKHgk1k8hxWWxjCM0VkdnINJRtkE lqH3hWZ/CKJYOBBBJxppu/FWh2qzNUrcmQRE6lpvt+UWUKPD9cbIb5bWhmlxbbL5JoUywiMddHRQ x591GWqwXXdsfJeoeMO5UZ4/AaaHKXv1xVKgfghuNuyB9fUHHYAA/u2CEIHlGbiffWuWyuSJMmKA bXbbbtuhi9kCUOIEJY57oYsraoduuOfGWO2J6Vor77z01mvvvfjmq+++/Pbr778AByzwwAQXbPDB CCfcZDobldLRVfLEEgerjQ1EEEemJMiioZEdkggYizSiqMQKl5wCw6qswg+rDTvc6h0Wq9KAJ5tV oGpJF9YysXn8lCfNL8HE88xw4EyzTDNDR4MMNUhfk40mhXkDTdHimHzjzRpgDcB0MEeHswf1sCZn GfrQDMrIAYZEkEEOJTQRQweBp5FIDTGCEUiHYWwRXHOPMpLdVgcu+OCEF2744YgnrvjijDfu+OOQ Ry755JRXbvnl/phnrvnmnHfu+eegZ57RAqSUzptv75E+M+Bb66L6InZwZ7rpr31aLQBhb2pap548 e7TsIX8dOr/pIIZQQphFHfGqEbtq/J2/DDrZ13Ga0jt8h/XX9TxvfRmmuPVUatb34INCplxakjtm XOQ7aP74c+k1fE4MD7fefvxBbLEeLldsyq/4o9ZzHOOHylBFS7f4RJxQMx/8MeB4ggIDA02ziLno wlfGoOByKnUAhZQNWfkzwAXzMEExVFB+86NJ/TDVC4SIZRzFs5Ni5OQ/p7XwLOOwQDXSswgFiYuD Z4GMP8AjtvGgJk9aYU2davdCeyzRU2LpBwkb2KjvWCU4T/TN/u1S+BKtYUBrXFue8DYQKFoVAzXa eJh/XiYPpZEOFhAMTnzkk8aQWQU+c7yHJkIGkGd4SkDhMJ9i5qMAOu4RAWfiYk1yxwvfaYCRA8oh JF14x0bGhgSyaZY07JCMRDLyWWnxTOyc1UmweMaSL5zSKf/xQgnk5lA3TCWWVunCRCrylrjMpS53 ycte+vKXwAymMIdJzGIa85jITKYyl8nMZjrzmdCMpjSnSc1qWvOa2MymvkY3u9IxMReyW92fuLm6 2Kmum53SIgZyxx7e9C423AyeNnkUw8RsSnqumsfWKKYnCdozen6iHiGsF483gkF7PIND96oUP7KE 73zteyj8/tK3JfGVqaHkkmhYMDrPJqzwfjRUlij4hzE4ds1pdGSMxgYYjAQZEBRtSeDKSmMMEGYG ghjU4+osGEF9ZNCEG3SEB2s6LTSIsKcl3CkKO2qEj24Sh/ucw/NmmCdXQQMbsbSlzZoGMkSSBYh5 kWIkEhWc3aARiVc0qE+hSCklkvCbUpQgFTWYRCy+la1bZGoQvHgBMPIznyT7QBkNgsY05m+NNSQa Lwx6ijvJsZB69IIdB5nHOjKij9twCCAVGJ7HGlKyiMyhXo0wyUtmoLS2LK0ID+XIEWRys5ycyzg+ yQ9TtjB2lpyLbZ8qy91mVZK+ReWZVCkNVmp1tMhNrnKX/svc5jr3udCNrnSnS93qWve62M2udrfL 3e5697vgDa94x0ve8pr3vOhNr3rXy972uve98I2vfOdLXxrBS0Uv8lZGUaUh/OKXXRmAV7jMVV+X QLK4vD0TaoHLWq1UEsEJFu0FXknLh3iyM5EssEtQlrK98ZN5QbNqyl71pwqEza752MfZEqrhljg1 pYMKkBh3FuKTXtUX+LupMkwcETNCA40D6QNiA3tfdunXAkdOEX+1Ba68tjiqLbVOnKp60oNAam6J fcyUvTYLAnDHOw8Jjx7Js71YTKWzxX1IV76iyayuWTCwDSIgKJxmqLI5zmp6sg5ZNdV7bkPGQWYh 0EzR/s8+A1THEt6hIrx6IbByRawKHKjfpEfExVREpUEdzKX3dJe5UaQ6UdT0p18VGCfPF2X8S4QD QgaamI24hi1TtTxZyuVZ6AzK6gBnIbE66DmhImlzxAYouUq0XQ+oUhG039P+rAZgG7u1erYFyy6W Tt85ddkmHak3PWVaWuePAC9F4Mh6dgdjB/A8tCqbscUxWLmumxp8jsa5A5RuY7xbwtHGtT+Phz69 nGo0WC60DPt9u0AljxWG8kylh9hsRKw1jbiwx24cDsUKSRwYFPdIq2347NoWkSEAKnG++brnGes7 sYH1QPVqVdDsOZZXUlN2WYO1soCA9JBoScjNQdvs/n3fKXaxYefOH9BDfD+Z5Db78Dv+WuWUd4Bj YwPDx1bNiI03BoO7yRi9CzJBBLlQdj5tTbKIOFQqikHjruN6Bovlw5GnXZxjtMXbZ01O2NnhdawL ASOFw8BIxpOSuutUYWfmBjW0U1S+gczhqy0Wzuhmd7Ur5RYW/01Tz3dKcpYVl/Isrs2jBSyZJ4H7 LIq+4VYUL2NZaCMgQiY1LXSjFH09wWexvovGvvawX2q+d8/73vv+98APvvCHT/ziG//4yE++8pfP /OY7//nQj770p0/96lv/+tjPvva3z/3ue//74A+/+MdP/vKb//zoT7/6e3Lf/3KryTDKUPvdBQIB /q+JwOuPwYEhbFzcYDjDuPN/lARL/FdLRlcZwdUNnTRbGAZt+fcCHCYzGqd0NJZtrsYJFjFGJ2ZQ m1A2kcZiD+gXLKNsMMZsTQdiFvg/IJUID7RjldFjhAVkGaM/6lASRfYu8KcuS6aDO4hkOfh7p7Jl bBRlVxYSWSZlfVKDXfZltRJmADFmulJmb3BmBJhbb9YZp1RLV9hmwtUWdBZhnYeFCaZ7Rxdv/5Q8 gKaCvNBrQ0hCZxhjLhgHXEV1PiQIjhBEkDZT6VFSmkFWhbBppMZBljZqVtZpIUGIqCNqevMYlhdf qEYKslZ10zZibbgQDkN1IndyTkcLxiFTulZI/muYRsrjbKA4bNYwNR1nPsn2K6J4PKdYbKXYbSM3 bSQVeWdybWwIa9Rmi0b3FwUEKAcUU+MGTr4AivP2hGSgbqDIbjDobssIb1IlbzSEbslob894gGUY jYkxeyf3GABnhAK3jeTDYxE0J5uRcEtjdYUnaoMXHStGGxlnNxs4cYgARRt3Y8UobB5XVhhXjyTR e0jnbfoURkGzDh+wcquACmqFUDD3iiw0LZFmczhmWTknkZ9FdK5IDH0GdArWGaB4kUXHewEpbSZH kLX2AVA3dVPHamgjNQ8XZG0Ddl2XLF9HOmF3RPmTKGV3IGdXdWl3k2zXiPBVd3nXV3PHOkRpgk5A lYlgg2F8Fw3WlnZW9HiCB2Q0Y3ic8k2Kl5V4JQhUiXgWFgqUh1e9h3mcpy2epxdm+XnjQ1EiMHoQ pVtogiWuV3urBxGod4Xnw41huJfjKHvtg3t8GYKEWZiGeZiImZiKuZiM2ZiO+ZiQGZmSOZmUWZmW eZmYmZmauZmc2ZlCEQEAOw== --6a82fb459dcaacd40ab3404529e808dc-- --652b8c4dcb00cdcdda1e16af36781caf Content-Type: text/plain; name="attachment.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.txt" VGhpcyBpcyBqdXN0IGEgcGxhaW4gdGV4dCBhdHRhY2htZW50IGZpbGUgbmFtZWQgYXR0YWNobWVu dC50eHQgLg== --652b8c4dcb00cdcdda1e16af36781caf-- Advertise on this site Advertise On This Site Site map Site Map Newsletter Newsletter Statistics Statistics Site tips Site Tips Privacy policy Privacy Policy Contact Contact Icontem Copyright (c) Icontem 1999-2021 For more information send a message to info at phpclasses dot org.'; 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