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 = '/(?si)(?<=<span style="font-size: 16px; font-family: Arial;">)(?!.*?(?:strong|contenuto)).*?&nbsp;<\/span><br>.*?(?=<\/span><br>\s+<br>)/m'; $str = '<p data-mce-style="margin-top: 5.0pt; margin-right: 1.5pt; margin-bottom: 5.0pt; margin-left: 37.55pt; mso-pagination: widow-orphan;" style="margin: 5pt 1.5pt 5pt 37.55pt; text-align: center;"><br> </p> <p style="text-align: center;"> <span style="font-size: 16px; font-family: Arial;"><strong>Caratteristiche:</strong></span><br> <br> <span style="font-size: 16px; font-family: Arial;"> Contenuto del pacco:</span><br> <br> <span style="font-size: 16px; font-family: Arial;">PC empire , usato perfettamente funzionante con windows 10 anche se ha coa windows 7 originale con lettore di schede di memoria mmc e altri formati con 8 porte usb 2.00 , con processore i5 -2400 e 8gb di ram 500 gb di hardisk e lettore masterizzatore dvd scheda lan on board e scheda video e audio onboard windows 10 64 bit appena installato , perfettamente funzionante &nbsp;</span><br> <br> <span style="font-size: 16px; font-family: Arial;"> l\'acquisto e\' fatto come visto e piaciuto le immagini descrivono i prodotti e le condizioni dei tali le descrizioni dei prodotti sono puramente indicative. Per ottenere una descrizione accurata si consiglia di visitare il sito del produttore. non rispondiamo di eventuali differenze riscontrabili tra le caratteristiche indicate nelle descrizioni e le immagini</span><br> <br> <span style="font-size: 16px; font-family: Arial;"> </span><br> <br> <span style="font-size: 16px; font-family: Arial;"><span style="color: rgb(255, 51, 51);"> </span><br> </span> </p> <p style="text-align: center;"><span style="font-size: 16px; font-family: Arial;"><br> </span> </p> <p style="text-align: center;"><span style="font-size: 16px; font-family: Arial;"><br> </span> </p>'; preg_match_all($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