PHP, Curl and XML

<?php
/**
 * https://www.experts-exchange.com/questions/29025211/PHP-Curl-and-XML.html
 */
error_reporting(E_ALL);
echo '<pre>';

// SET CREDENTIALS FOR THE XML DOCUMENT
$txtusername = '??';
$txtpassword = '??';
$bookingid   = '??';

$xml = <<<EOD
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance "
               xmlns:xsd="http://www.w3.org/2001/XMLSchema "
               xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    <soap:Header>
      <GatewaySoapAuthentication xmlns="http://ws.somesite.com/">
        <Username>$txtusername</Username>
        <Password>$txtpassword</Password>
      </GatewaySoapAuthentication>
    </soap:Header>
  <soap:Body>
    <GetBookingDetails xmlns="http://ws.somesite.com/">
      <BookingDetailsRequest>
        <BookingNumber>$bookingid</BookingNumber>
      </BookingDetailsRequest>
    </GetBookingDetails>
  </soap:Body>
</soap:Envelope>
EOD;


// CREATE THE HEADER
$header =
[ 'Content-type: text/xml; charset=utf-8'
, 'Content-length: ' . strlen($xml)
, 'SOAPAction: http://ws.somesite.com/GetBookingDetails'
, 'Connection: close'
]
;

//CREATE THE URL
$url = trim('http://ws.somesite.com/FlightGateway.asmx');
echo PHP_EOL . "URL: $url";

// SET UP THE cURL REQUEST
$curl = curl_init();
curl_setopt( $curl, CURLOPT_URL,            $url           );
curl_setopt( $curl, CURLOPT_HTTPHEADER,     $header        );
curl_setopt( $curl, CURLOPT_POST,           TRUE           );
curl_setopt( $curl, CURLOPT_POSTFIELDS,     $xml           );
curl_setopt( $curl, CURLOPT_ENCODING,       'gzip,deflate' );
curl_setopt( $curl, CURLOPT_TIMEOUT,        5              );
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, TRUE           );
curl_setopt( $curl, CURLOPT_FOLLOWLOCATION, TRUE           );
curl_setopt( $curl, CURLOPT_FAILONERROR,    TRUE           );

// IF USING SSL, THIS INFORMATION IS IMPORTANT -- UNDERSTAND THE SECURITY RISK!
curl_setopt( $curl, CURLOPT_SSLVERSION,     CURL_SSLVERSION_DEFAULT  );
curl_setopt( $curl, CURLOPT_SSL_VERIFYHOST, 2  ); // DEFAULT
curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, 1  ); // DEFAULT

// SET THE LOCATION OF THE COOKIE JAR (THIS FILE WILL BE OVERWRITTEN)
curl_setopt( $curl, CURLOPT_COOKIEFILE,     'cookie.txt' );
curl_setopt( $curl, CURLOPT_COOKIEJAR,      'cookie.txt' );

// RUN THE CURL REQUEST AND GET THE RESULTS
$document  = curl_exec($curl);
$errno     = curl_errno($curl);
$info      = curl_getinfo($curl);
$http_code = $info['http_code'];
$errmsg    = curl_error($curl);
curl_close($curl);

// SHOW THE WORK PRODUCT
echo PHP_EOL . 'HTTP CODE: ' . htmlentities($http_code);
echo PHP_EOL . 'cURL ERRNO: ' . htmlentities($errno);
echo PHP_EOL . 'cURL ERROR: ' . htmlentities($errmsg);
echo PHP_EOL; print_r($info);
echo PHP_EOL . 'DOCUMENT: ' . htmlentities($document);

// SHOW THE COOKIES, IF ANY
echo PHP_EOL . PHP_EOL;
echo @file_get_contents('cookie.txt');

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URL: http://ws.mycompany.com/FlightGateway.asmx
HTTP CODE: 500
cURL ERRNO: 22
cURL ERROR: The requested URL returned error: 500 Internal Server Error
Array
(
    [url] => http://ws.mycompany.com/FlightGateway.asmx
    [content_type] => 
    [http_code] => 500
    [header_size] => 25
    [request_size] => 261
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.192042
    [namelookup_time] => 0.053744
    [connect_time] => 0.081707
    [pretransfer_time] => 0.081827
    [size_upload] => 33499
    [size_download] => 0
    [speed_download] => 0
    [speed_upload] => 174435
    [download_content_length] => -1
    [upload_content_length] => 33499
    [starttransfer_time] => 0.107776
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 70.42.217.162
    [certinfo] => Array
        (
        )

    [primary_port] => 80
    [local_ip] => 69.65.27.131
    [local_port] => 48968
)

DOCUMENT: 

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<?php // demo/mycompany.php
/**
 * https://www.experts-exchange.com/questions/29025211/PHP-Curl-and-XML.html
 *
 * https://curl.haxx.se/libcurl/c/libcurl-errors.html
 *
 * https://ws.mycompany.com/test/FlightGateway.asmx?op=GetBookingDetails
 */
error_reporting(E_ALL);
echo '<pre>';


// SET CREDENTIALS FOR THE XML DOCUMENT
$txtusername = '??';
$txtpassword = '??';
$txtbookingid = '??';


$xml = <<<EOD
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xmlns:xsd="http://www.w3.org/2001/XMLSchema"
               xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <GatewaySoapAuthentication xmlns="http://ws.somesite.com/">
      <Username>$txtusername</Username>
      <Password>$txtpassword</Password>
    </GatewaySoapAuthentication>
  </soap:Header>
  <soap:Body>
    <GetBookingDetails xmlns="http://ws.somesite.com/">
      <BookingDetailsRequest>
        <BookingNumber>$txtbookingid</BookingNumber>
      </BookingDetailsRequest>
    </GetBookingDetails>
  </soap:Body>
</soap:Envelope>
EOD;


// CREATE THE HEADER
$header =
[ 'Content-type: text/xml; charset=utf-8'
, 'Content-length: ' . strlen($xml)
, 'SOAPAction: http://ws.mycompany.com/GetBookingDetails'
, 'Connection: close'
]
;

// CREATE THE URL
$url = 'http://ws.mycompany.com/test/FlightGateway.asmx';
echo PHP_EOL . "URL: $url";

// SET UP THE cURL REQUEST
$curl = curl_init();
curl_setopt( $curl, CURLOPT_URL,            $url           );
curl_setopt( $curl, CURLOPT_HTTPHEADER,     $header        );
curl_setopt( $curl, CURLOPT_POST,           TRUE           );
curl_setopt( $curl, CURLOPT_POSTFIELDS,     $xml           );
curl_setopt( $curl, CURLOPT_ENCODING,       'gzip,deflate' );
curl_setopt( $curl, CURLOPT_TIMEOUT,        5              );
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, TRUE           );
curl_setopt( $curl, CURLOPT_FOLLOWLOCATION, TRUE           );
curl_setopt( $curl, CURLOPT_FAILONERROR,    TRUE           );

// IF USING SSL, THIS INFORMATION IS IMPORTANT -- UNDERSTAND THE SECURITY RISK!
// curl_setopt( $curl, CURLOPT_SSLVERSION,     CURL_SSLVERSION_DEFAULT  );
// curl_setopt( $curl, CURLOPT_SSL_VERIFYHOST, 2  ); // DEFAULT
// curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, 1  ); // DEFAULT

// SPECIFIED BY THE AUTHOR
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);

// SET THE LOCATION OF THE COOKIE JAR (THIS FILE WILL BE OVERWRITTEN)
curl_setopt( $curl, CURLOPT_COOKIEFILE,     'cookie.txt' );
curl_setopt( $curl, CURLOPT_COOKIEJAR,      'cookie.txt' );

// RUN THE CURL REQUEST AND GET THE RESULTS
$document  = curl_exec($curl);
$errno     = curl_errno($curl);
$info      = curl_getinfo($curl);
$http_code = $info['http_code'];
$errmsg    = curl_error($curl);
curl_close($curl);

// SHOW THE WORK PRODUCT
echo PHP_EOL . 'HTTP CODE: ' . htmlentities($http_code);
echo PHP_EOL . 'cURL ERRNO: ' . htmlentities($errno);
echo PHP_EOL . 'cURL ERROR: ' . htmlentities($errmsg);
echo PHP_EOL; print_r($info);
echo PHP_EOL . 'DOCUMENT: ' . htmlentities($document);

// SHOW THE COOKIES, IF ANY
echo PHP_EOL . PHP_EOL;
echo @file_get_contents('cookie.txt');

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