Regular Expressions 101

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/
[^[\p{L}|\p{N}|\s|-]
/
gm
Match a single character not present in the list below
[^[\p{L}|\p{N}|\s|-]
[ matches the character [ with index 9110 (5B16 or 1338) literally (case sensitive)
\p{L} matches any kind of letter from any language
| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
\p{N} matches any kind of numeric character in any script
| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
\s matches any whitespace character (equivalent to [\r\n\t\f\v ])
|-
matches a single character in the list |- (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Generated Code

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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