Regular Expressions 101

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  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python 2.7
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"
href=[\'\"]([^\'\" >])
"
g
href= matches the characters href= literally (case sensitive)
Match a single character present in the list below
[\'\"]
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
\' matches the character ' literally (case sensitive)
\" matches the character " literally (case sensitive)
1st Capturing Group
([^\'\" >])
Match a single character not present in the list below
[^\'\" >]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
\' matches the character ' literally (case sensitive)
\" matches the character " literally (case sensitive)
> matches a single character in the list > (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

r"
"
g

Test String

Regular Expressions 101

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