- var_dump: documentation ( source)
- array_merge: documentation ( source)
- array_unique: documentation ( source)
<?php
$something = array(
'value0',
'value1',
'value2'
);
$somethingElse = array(
'value2',
'value3'
);
var_dump( array_unique( array_merge($something, $somethingElse) ) );