3v4l.org

run code in 300+ PHP versions simultaneously
<?php $resultSet = [ ['keyw' => 'sam , ram,shyam'], ['keyw' => 'sam,ram,shyam, mohan'], ['keyw' => 'sam, ram, shyam ,mohan,salman,babu , karan'], ]; $unique = []; foreach ($resultSet as $row) { $unique += array_flip(preg_split( '/ *, */', $row['keyw'], 0, PREG_SPLIT_NO_EMPTY )); } var_export(array_keys($unique));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array ( 0 => 'sam', 1 => 'ram', 2 => 'shyam', 3 => 'mohan', 4 => 'salman', 5 => 'babu', 6 => 'karan', )
preferences:
118.6 ms | 407 KiB | 5 Q