How can I split this string of comma-separated dimensions into two arrays? The string may have many items in it, but it will always have the same two alternating delimiters (exes and commas).
$str = "20x9999,24x65,40x5";
I need to get two arrays from this string:
$array1 = [20, 24, 40];
$array2 = [9999, 65, 5];
I've tried many implementations of preg_split(), array_slice(), and regex. I can't get it done.
You can explode the string by commas, and then explode each of those values by x, inserting the result values from that into the two arrays:
$str = "20x9999,24x65,40x5";
$array1 = array();
$array2 = array();
foreach (explode(',', $str) as $key => $xy) {
list($array1[$key], $array2[$key]) = explode('x', $xy);
}
Alternatively, you can use preg_match_all, matching against the digits either side of the x:
preg_match_all('/(\d+)x(\d+)/', $str, $matches);
$array1 = $matches[1];
$array2 = $matches[2];
In both cases the output is:
Array
(
[0] => 20
[1] => 24
[2] => 40
)
Array
(
[0] => 9999
[1] => 65
[2] => 5
)
Note that as of PHP7.1, you can use array destructuring instead of list, so you can just write
[$array1[$key], $array2[$key]] = explode('x', $xy);
instead of
list($array1[$key], $array2[$key]) = explode('x', $xy);
You can use this to simplify the assignment of the result from preg_match_all as well:
[, $array1, $array2] = $matches;