How to extract regex value from preg_split() function in PHP

Question

If I use preg_split() function for example:

$string = 'products{id,name},articles{title,text}';
$arr = preg_split('/\}\,(\w)/', $string);
print_r($arr);

I receive the following result:

Array ( [0] => products{id,name [1] => rticles{title,text} )

How to receive full word articles i.e. to extract the value of the regex pattern ?

ps. If it's possible at all

Might be a good idea here to give an example of what you are entering and what you expect to get back. — Richard Housham
– Richard Housham, Commented Aug 25, 2020 at 10:23
The string I'm entering is in my question. As you see now I receive rticles but I want to extract also regex value a and add it before the rticles — stckvrw
– stckvrw, Commented Aug 25, 2020 at 10:25

The fourth bird · Accepted Answer · 2020-08-25 10:25:42Z

1

You could split on matching the curly braces, clear the match buffer. Then match the comma and use a positive lookahead to assert a word character on the right instead of matching it.

{[^{}]*}\K,(?=\w)

The pattern matches:

{ Match {
[^{}]* match 0+ times any char except { and }
} Match }
\K, Forget what is matches until now and match a comma
(?=\w) Positive lookahead, assert what is directly to the right is a word character

Regex demo | Php demo

$string = 'products{id,name},articles{title,text}';
$arr = preg_split('/{[^{}]*}\K,(?=\w)/', $string);
print_r($arr);

Output

Array
(
    [0] => products{id,name}
    [1] => articles{title,text}
)

answered Aug 25, 2020 at 10:25

The fourth bird

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