3v4l.org

run code in 300+ PHP versions simultaneously
<?php $alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; $offset = 1; $limit = 6; $start = max(0, $offset-$limit); $end = min(strlen($alpha)-1, $offset+$limit); Echo substr($alpha, $start, $end-$start+1); /* To output them one by one as in an array you can use this: $result = substr($alpha, $start, $end-$start+1); For($i=0; $i<strlen($result); $i++){ Echo $result[$i] . "\n"; } Or you can explode("", $result); to make it a true array */
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
ABCDEFGH

preferences:
217.15 ms | 404 KiB | 302 Q