$server = '
https://ws-erp.manager.cl/Flexline/CCCS/WSDocumento/Documento.asmx/InyectarDocumento';
$headers = [
"Content-type: application/x-www-form-urlencoded",
"Content-length: " . strlen($contenido), "Connection: close",
];
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $server);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 100);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $contenido);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$data = curl_exec($ch);
if (curl_errno($ch)) {
echo curl_error($ch);
curl_close($ch);
} else {
print_r($data);
curl_close($ch);
}