3v4l.org

run code in 300+ PHP versions simultaneously
<?php $seriesArray = array(1, 2, 3, 5, 7, 8, 11, 12, 15); $result = array(); $indx = 0; foreach($seriesArray as $key => $val){ $tmp = $seriesArray[$key]; $next = (isset($seriesArray[$key+1]))? $seriesArray[$key+1] : ''; if($next != ''){ if(!isset($result[$indx])) $result[$indx] = array(); if(($tmp+1) == $next ){ $result[$indx][] = $tmp; }else{ $result[$indx][] = $tmp; $indx++; } }else{ $result[$indx][] = $tmp; } } foreach($result as $key => $val){ echo "Series ".($key+1)." : ".implode(",",$result[$key])."\n"; }
Output for 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Series 1 : 1,2,3 Series 2 : 5 Series 3 : 7,8 Series 4 : 11,12 Series 5 : 15

preferences:
166.92 ms | 403 KiB | 178 Q