Get Parameters passed Via Header Enrishment

Dear Guru,

i am creating an advise of charge for a telecomunication company using PHP and they have parameter that they are sending to the App via header enrishment. how can i get the parameter. here attached is the traces to capture the parameters. my interest are the imsi and msisdn


i got it the answer.

$imsi = $_SERVER['IMSI];
$msidn = $_SERVER[MSISDN'];

This was after the printing everything on coming from server

foreach($_SERVER as $key => $value) {
	echo $key ." ".$value. "</br>";