PHP - preg_match_all Same Group, Different Pattern - php

Question

<?php
$str = '123.456.789.987,654,321,';
// preg_match_all('((?<grp1>\d{3})\.|(?<grp2>\d{3})\,)', $str, $matches);
preg_match_all('((?<grp1>\d{3})\.|(?<grp1>\d{3})\,)', $str, $matches);
print_r($matches);
?>
Based on code above, I want to get all the string as an group array called grp1, but it always become error PHP Warning: preg_match_all(): Compilation failed: two named subpatterns have the same name at offset .... If I change one of the group name to grp2 it works well.
Is it possible to using 1 group name instead of different group name in preg_match_all?
Update
There is a reason why I cannot using something like this /(?<grp1>\d{3})[.,]/, here is an example to clear the problem:
<?php
$str = '
src="img1.png"
src="img2.jpg"
url(img3.png)
url(img4.jpg)
';
preg_match_all('/src=\"(?<img1>(\w+)(.png|.jpg))\"|url\((?<img2>(\w+)(.png|.jpg))\)/', $str, $matches);
print_r($matches);
?>
I want to take all the img1.png, img2.jpg, img3.png and img4.jpg into array group named img something like this:
[img] => Array
(
[0] => img1.png
[1] => img2.jpg
[2] => img3.png
[3] => img4.jpg
)

Answer 1

First of all a regex in PHP needs to be wrapped in boundaries like / or # etc.
Then your regex doesn't need to be this complex. Same can be simplified using this regex:
/(?<grp1>\d{3})[.,]/
Full Code:
$str = '123.456.789.987,654,321,';
preg_match_all('/(?<grp1>\d{3})[.,]/', $str, $matches);
print_r($matches['grp1']);
OUTPUT:
Array
(
[0] => 123
[1] => 456
[2] => 789
[3] => 987
[4] => 654
[5] => 321
)
UPDATE: As per your updated question:
$str = '
src="img1.png"
src="img2.jpg"
url(img3.png)
url(img4.jpg)
';
preg_match_all('/(?<=src="|url\()(?<img>[^")]+)/i', $str, $matches);
print_r($matches['img']);
OUTPUT:
Array
(
[0] => img1.png
[1] => img2.jpg
[2] => img3.png
[3] => img4.jpg
)