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 = '/(Fatal data error processing file \'[^\']+\'\.\n?\s?|General failure \(\d+\): )(?<Exception>[^\n\$]+)/m'; $str = 'FILE_READER[1]: TT19472 Fatal data error processing file \'/default/folder/ingest/amr_ca_sf_items_658721_US.out\'. Field length overflow(s) in record 2355, field 17, \'COUNT_DESC\'. Expected 300 bytes, field contained 307 bytes. FILE_READER[1]: TT19015 TPT Exit code set to 12. $FILE_READER: DataConnector Producer operator Instances: 1 $FILE_READER: ECI operator ID: \'$FILE_READER-18808\' $FILE_READER: Operator instance 1 processing file \'/default/folder/ingest/amr_ca_sf_items_658721_US.out\'. $FILE_READER: TT19472 Fatal data error processing file \'/default/folder/ingest/amr_ca_sf_items_658721_US.out\'. Field length overflow(s) in record 1, field 1, \'"ORDER"\'. Expected 20 bytes, field contained 841 bytes. $FILE_READER: TT19015 TPT Exit code set to 12. FILE_READER: TT19434 pmAttach failed. General failure (34): \'!ERROR! dlopen failed: /default/folder/installations/lib/axm.so: cannot open shared object file: No such file or directory\' FILE_READER: TT19302 Fatal error loading access module. FILE_READER: TT19015 TPT Exit code set to 12. FILE_READER: TT19134 !ERROR! Fatal data error processing file \'/default/folder/ingest/rpv0410_12123_1.out.gz\'. Delimited Data Parsing error: Too many columns in row 246. FILE_READER: TT19015 TPT Exit code set to 12. FILE_WRITER: TT19434 pmWrite failed. General failure (34): \'pmunxWBuf: fwrite byte count error (No space left on device)\' FILE_WRITER: TT19306 Fatal error writing data. FILE_WRITER: TT19015 TPT Exit code set to 12. '; preg_match_all($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