$response1 => file_get_contents('https://api.wachat.net/send?receiver=$receiver&msgtext=Testing+Send+Message+Through+API&token=$token'); // Send message (Text only)
$response1 => file_get_contents('https://api.wachat.net/send?receiver=$receiver&msgtext=Testing+Send+Message+Through+API&token=$token&mediaurl=$mediaurl'); // Send message with media
echo $response1; // output {success:true} or {success:false}
echo $response1; // output {success:true} or {success:false}
Note : don't forget to URL encode your query params like base64 or utf-8