3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array( 'post' => array( 'tr' => array( 'slug' => 'a' ), 'en' => array('slug'=>'a') ) ); echo var_dump(array_unique( array_diff_assoc( $a, array_unique( $a ) ) )); ?>
based on JcKqe
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Array to string conversion in /in/ZAZuE on line 10 Notice: Array to string conversion in /in/ZAZuE on line 10 array(0) { }
Output for hhvm-3.12.0
Notice: Array to string conversion in /in/ZAZuE on line 10 Notice: Array to string conversion in /in/ZAZuE on line 10 Notice: Array to string conversion in /in/ZAZuE on line 10 array(0) { }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.3.29
array(0) { }