Regular Expressions 101

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  • PCRE2 (PHP >=7.3)
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/
\\"|"(?:\\"|[^"])*"|(\+)
/
g
1st Alternative
\\"
\\ matches the character \ literally (case sensitive)
" matches the character " literally (case sensitive)
2nd Alternative
"(?:\\"|[^"])*"
" matches the character " literally (case sensitive)
Non-capturing group
(?:\\"|[^"])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
\\"
\\ matches the character \ literally (case sensitive)
" matches the character " literally (case sensitive)
2nd Alternative
[^"]
Match a single character not present in the list below
[^"]
" matches the character " literally (case sensitive)
" matches the character " literally (case sensitive)
3rd Alternative
(\+)
1st Capturing Group
(\+)
\+ matches the character + literally (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

/
/
g

Test String