regex101: PCRE2 (PHP) Match Workspace

1st Alternative(?<=,")[^"\n]*(?=",)

Positive Lookbehind(?<=,")

,"the literal text ,"

Negated Character Class[^"\n]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=",)

",the literal text ",

2nd Alternative(?<=,)(?!")[^,\n]*(?<!")(?=,)

Positive Lookbehind(?<=,)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negative Lookahead(?!")

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^,\n]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

Negative Lookbehind(?<!")

"the literal " (34₁₀ / 42₈ / 22₁₆)

Positive Lookahead(?=,)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(?<=,")[^"\n]*(?=",)|(?<=,)(?!")[^,\n]*(?<!")(?=,)

New

"0x00000000","What do you want to eat? fish, meat or\n eggs?",""
"0x00030002","What do you want to eat?",""
0x00030002,What do you want to eat?,
"0x00030002","What do you, want to eat?",""
0x00030002,What do "you want" to eat?,
"0x00030002,What do you want to eat?,",?,

"0x00030002","What do you want to eat?,"
0x00030002 ,What do you want to eat?",

Note \n is included in [^"\n] merely to test the regex against multiple strings.

Regular Expressions 101

Regular Expression

Extraction