var link = 'http://www.testhostfile.com/GetData.php';

$http({
url: link,
method: "GET",
headers: {'Content-Type': 'application/x-www-form-urlencoded'},
data: $scope.inmateData.IMID

}).then(function (res){
alert('Success');
console.log(res);
});

<?php

$db_name  = 'testDb';
$hostname = 'localhost';
$username = 'testName';
$password = 'password';
$usertable = "InMateMaster";

$fileData = file_get_contents("php://input");
$request = json_decode($fileData);

if (isset($request)) {

$imID = $request->IMID;

echo($imID);
}

$db = new mysqli("localhost",$username,$password,$db_name);

if($db->connect_errno > 0) {
die('Unable to connect to database[' .$db->connect_error. ']');
}

$sql = "SELECT * FROM InMateMaster WHERE IMID = 'KAS9791257393'";


if(!$result = $db->query($sql)){
die('There was an error running the query [' .$db->error. ']');
}

$arr = array();
if($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
$item = array();
$item['IMName'] = $row['IMName'];
$item['IMMobile'] = $row['IMMobile'];
$item['IMFatherName'] = $row['IMFatherName'];
$arr[] = $item;
}
}

header('Content-Type: application/json');
echo json_encode($arr);

?>