can someone tell me how to use named groups syntax in PHP?
I'm trying to parse a simple math equation, for example someVariable!=someValue.
I'd like to get 3 values from matching operation, stored in 3 variable variable, operator, value.
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1Use a parser to parse math / equations. Using regexes for those is not only error-prone, it will also be a lot harder.Wrikken– Wrikken2011-02-24 19:31:42 +00:00Commented Feb 24, 2011 at 19:31
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See also: regular-expressions.info/named.htmldreftymac– dreftymac2019-08-21 21:24:42 +00:00Commented Aug 21, 2019 at 21:24
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See also: stackoverflow.com/questions/31677485/…dreftymac– dreftymac2019-08-21 21:25:10 +00:00Commented Aug 21, 2019 at 21:25
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2 Answers
Is this basically what you're looking for?
$equation = 'someVariable!=someValue';
$matches = array();
preg_match('~^(\w+)([!=]+)(\w+)$~', $equation, $matches);
$variable = $matches[1];
$operator = $matches[2];
$value = $matches[3];
The actual regular expression is pretty silly, but I assume you already have that part figured out.
3 Comments
yitznewton
See also example 4 at php.net/manual/en/function.preg-match.php if you are looking for named subpatterns
ZolaKt
Actually I need to match any logical operator, and ignore the quotations (single or double) if they surround the value, but thats basically what I'm looking for. Thanks
mickmackusa
There are no "named capture groups" in this answer.
2 Comments
igorw
mickmackusa
This link-only hint (answer) could have been a comment under the question.