<slide title="TCP Client">
<blurb>
Here is a simple HTTP client that leverages the socket 
extension in order to download a webpage directly.
</blurb>

<example fontsize="1.2em"><![CDATA[<?php
error_reporting (E_ALL);

/* Get the port for the WWW service. */
$service_port = getservbyname ('www', 'tcp');

/* Get the IP address for the target host. */
$address = gethostbyname ('www.php.net');

/* Create a TCP/IP socket. */
$socket = socket_create (AF_INET, SOCK_STREAM, 0);
if ($socket < 0) {
    echo "socket_create() failed: reason: " . socket_strerror ($socket) . "\n";
}

$result = socket_connect ($socket, $address, $service_port);
if ($result < 0) {
    echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";
} 

$in = "HEAD / HTTP/1.0\r\n\r\n";
$out = '';

socket_write ($socket, $in, strlen ($in));

while ($out = socket_read ($socket, 2048)) {
    echo $out;
}

socket_close ($socket);
?>]]></example>
</slide>