3v4l.org

run code in 500+ PHP versions simultaneously
<?php $res_events = "|2,20171021|1,20171007|2,20171007|1,20171028|2,20171014|1,20171014|2,20171028|1,20171021|"; $arr = explode("|", $res_events); Sort($arr); // Remove one of the two empty values in array Unset($arr[0]); // Implode and add last "|" $new =implode("|", $arr)."|"; Echo $new;
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
|1,20171007|1,20171014|1,20171021|1,20171028|2,20171007|2,20171014|2,20171021|2,20171028|
preferences:
74.68 ms | 1693 KiB | 4 Q