Online PHP editor | refs for hEud7

<?php $arr = [ ['id' => 14598, 'email_adr' => 'jos@pl.nuu', 'ad_owner_email' => 'boo@gmail.qom',], ['id' => 14598, 'email_adr' => 'boo@gmail.com', 'ad_owner_email' => 'jos@pl.nuu',], ['id' => 14598, 'email_adr' => 'boo@gmail.com', 'ad_owner_email' => 'pelle@med.nuu',], ]; foreach($arr as $key => $value) { if(isset($arr[$key+1])) { if ($value['email_adr'] == $arr[$key + 1]['ad_owner_email']) { unset($arr[$key]); } } } $arr = array_values($arr); echo '<pre>'; var_dump($arr); echo '</pre>';