array(array("Color", "red" ), array("Ram", "4GB" ) );
Convert this multidimensional array into a string like this
Color=red&Ram=4GB
You need to rearrange the input array a bit and then you can use http_build_query()
$sq = array(array("Color", "red" ), array("Ram", "4GB" ) );
$aa = [];
foreach( $sq as $s ) {
$aa[$s[0]] = $s[1];
}
echo http_build_query($aa);
RESULT
Color=red&Ram=4GB