<?php $a = array ( 0 => 'test4,test,,,,test,1,123566', 1 => 'test,test,,,,test,1,123566', 2 => 'test,test,,,,test,1,123566', 3 => 'test,test,,,,test,1,123566', ); // $acount = array_count_values($a); $diff = ($a[0] === $a[1]); var_dump(array_count_values($a));
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