<?php
$arr1 = array(array("size"=>"M","colour" => "black"),array("size"=>"S","colour" => "blue"));
$arr2 = array("size"=>"M","colour" => "black");
print_r($arr1);
print_r($arr2);
foreach($arr1 as $marray)
{
if($marray['size'] == $arr2['size'] && $marray['colour'] == $arr2['colour'])
{
echo "match found";
}
}
?>