How to read a web page in PHP

Question

I'm new to PHP and trying to save some web pages to text files using PHP scripts. Do you know any PHP script to load a web page into a file buffer and remove HTML tags?

Answer 1

• The easy way: fopen() or file_get_contents() the URL: fopen("http://google.com/", "r")
• The smart way: Use the cURL library
• The other smart way: http_get() from PHP's http module
• The hard way: Craft a HTTP request and send it with fsockopen() or stream_socket_client()
• The C way: Send a HTTP request using sockets
• The stupid way: call an external tool such as wget or curl through system()

None of these is guaranteed to be available on your server though.

Answer 2

one way.

$url = "http://www.brothersoft.com/publisher/xtracomponents.html";
$page =file_get_contents($url);
$outfile="xtracomponents.html";
$f = fopen($outfile,"w");
fwrite($f,$page);
fclose($f);

Answer 3

As the other answers have said, either standard PHP stream functions or cURL is your best bet for retrieving the HTML. As for removing the tags, here are a couple approaches:

Option #1: Use the Tidy extension, if available on your server, to walk through the document tree recursively and return the text from the nodes. Something like this:

function textFromHtml(TidyNode $node) {
    if ($node->isText()) {
        return $node->value;
    } else if ($node->hasChildren()) {
        $childText = '';
        foreach ($node->child as $child)
           $childText .= textFromHtml($child);
        return $childText;
    }
    return '';
}

You might want something more sophisticated than that, e.g., that replaces <br /> tags (where $node->name == 'br') with newlines, but this will do for a start.

Then, load the text of the HTML into a Tidy object and call your function on the body node. If you have the contents in a string, use:

$tidy = new tidy();
$tidy->parseString($contents);
$text = textFromHtml($tidy->body());

Option #2: Use regexes to strip everything between < and >. You could (and probably should) develop a more sophisticated regex that, for example, matched only valid HTML start or end tags. Any errors in the synax of the page, like a stray angle bracket in body text, could mean garbage output if you aren't careful. This is why Tidy is so nice (it is specifically designed to clean up bad pages), but it might not be available.

Answer 4

I strongly recommend you to take a look at SimpleHTML DOM class;

SimpleHTML DOM Parser at SourceForge

With it you can search the DOM tree using css selectors like with jQuery's $() function or prototypeJS $$() function.

Although it works with file_get_contents() to get content of a web page, you can pass it HTML only with some cURL class of yours ( if you need to login etc. )