PHP function that can obtain the HTML code of any web page

function display_sourcecode($url)
{
$lines = file($url);
$output = "";
foreach ($lines as $line_num => $line) {
    // loop thru each line and prepend line numbers
    $output.= "Line #{$line_num} : " . htmlspecialchars($line) . "n";
}
}

用法：

$url = "http://www.open-open.com";
$source = display_sourcecode($url);
echo $source;
?>

Web, HTML, PHP