Online PHP editor | output for qoN2t

<?php // This is your updated data arrays $arry1 and $arry2 // Case1: introduce a dummy element with value "C" into $arry2 $arry1 = array( "lineCode" => "B", "serviceRequest" => "", "skillCode" => "15", "opCode" => "15", "jobType" => "CUSTOMER", "techNo" => "A05", "lineStatus" => "C" ); $arry2 = array( "dummy" => "C", // with this dummy element you will get an empty array back from array_diff() "id" => "755362", "rid" => "252184", "lineCode" => "B", "serviceRequest" => "", "skillCode" => "15", "opCode" => "15", "jobType" => "CUSTOMER", "techNo" => "A05", "lineStatus" => "W", "timeA" => "1575504138", "timeC" => "0", ); $diff = array_diff($arry1, $arry2); print_r($diff); // Case 2: delete the dummy entry, i.e. array_diff() now finds 1 value in $arry1 that is not present in $arry2 - "C" $arry1 = array( "lineCode" => "B", "serviceRequest" => "", "skillCode" => "15", "opCode" => "15", "jobType" => "CUSTOMER", "techNo" => "A05", "lineStatus" => "C" ); $arry2 = array( // deleted dummy entry "id" => "755362", "rid" => "252184", "lineCode" => "B", "serviceRequest" => "", "skillCode" => "15", "opCode" => "15", "jobType" => "CUSTOMER", "techNo" => "A05", "lineStatus" => "W", "timeA" => "1575504138", "timeC" => "0", ); $diff = array_diff($arry1, $arry2); print_r($diff);