Resquest Curl

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "http://177.72.184.140/server.php",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "<?xml version=\\\\\\\\"1.0\\\\\\\\" encoding=\\\\\\\\"iso-8859-1\\\\\\\\"?>\\\\\\\\r\\\\\\\\n<methodCall>\\\\\\\\r\\\\\\\\n\\\\\\\\t<methodName>client.list</methodName>\\\\\\\\r\\\\\\\\n\\\\\\\\r\\\\\\\\n\\\\\\\\t<params>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t<param name=\\\\\\\\"_user\\\\\\\\">\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\t<string>fernando</string>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t</param>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t<param name=\\\\\\\\"_passwd\\\\\\\\">\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\t<string>aqui eu coloca a senha</string>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t</param>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\t<param name=\\\\\\\\"codusu\\\\\\\\">\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\t<string>01</string>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t</param>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t<param name=\\\\\\\\"codcli\\\\\\\\">\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\t<string>10</string>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t</param>\\\\\\\\r\\\\\\\\n\\\\\\\\t\\\\\\\\t\\\\\\\\r\\\\\\\\n\\\\\\\\r\\\\\\\\n\\\\\\\\t</params>\\\\\\\\r\\\\\\\\n</methodCall>\\\\\\\\r\\\\\\\\n\\\\\\\\r\\\\\\\\n\\\\\\\\r\\\\\\\\n",
  CURLOPT_HTTPHEADER => array(
    "Content-Type: application/xml",
   
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response ;
}