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@ 2024-10-25T05:06:28Z

<?php

$array = [
    '46-sen1-Grid1-138',
    '47-sen2-Grid1-138',
    '50-sen5-Grid2-144',
    '51-sen6-Grid2-144'
];

$result = [];
foreach ($array as $v) {
    [1 => $k, 0 => $result[$k][]] = preg_split('/-Grid\d+-/', $v);
}
var_export($result);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
preg_split: documentation ( source)

preferences:dark modelive previewkey bindings

31.95 ms | 405 KiB | 5 Q