3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array('Jay', 'Jay', 'Jay', 'Spiders', 'Dogs', 'Cats', 'John', 'John', 'John', 'Dogs', 'Cows', 'Snakes'); $new = array( array_shift( $array)); foreach( $array as $el) { if( !($new[count($new) - 1] === $el)) { $new[] = $el; } } print_r( $new);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Jay [1] => Spiders [2] => Dogs [3] => Cats [4] => John [5] => Dogs [6] => Cows [7] => Snakes )
preferences:
281.53 ms | 406 KiB | 425 Q