How can PHP developers parse and interact with external servers using fsockopen?

PHP developers can parse and interact with external servers using fsockopen by establishing a connection to the remote server, sending HTTP requests, and reading the response. This allows developers to fetch data from external servers, interact with APIs, or perform other network-related tasks. 

<?php
$host = 'example.com';
$port = 80;

$fp = fsockopen($host, $port, $errno, $errstr, 30);
if (!$fp) {
    echo "Error: $errstr ($errno)\n";
} else {
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: $host\r\n";
    $out .= "Connection: Close\r\n\r\n";

    fwrite($fp, $out);

    while (!feof($fp)) {
        echo fgets($fp, 128);
    }

    fclose($fp);
}
?>

Keywords

PHP fsockopen socket programming external servers data parsing

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