Cara mudah kirim pesan whatsapp API via whacenter dengan metode GET menggunakan PHP
Pesan TEXT
<?php
$result = file_get_contents("https://app.whacenter.com/api/send?device_id=xxx&number=xxx&message=hai")
echo "<pre>";
print_r($result);
?> Pesan file / gambar
<?php
$result = file_get_contents("https://app.whacenter.com/api/send?device_id=xxx&number=xxx&message=hai&file=url-file-gambar")
echo "<pre>";
print_r($result);
?> 
