How do I grab title,description and key words with php?

how do I grab title,description and keywords...without get_meta_tags 开发者_C百科function??

You can also try this HTML DOM parser: http://simplehtmldom.sourceforge.net/

An option:

<?php

$database = 'meta_tags.txt';
$meta_db = fopen($database, 'r');

$page = $_SERVER['SCRIPT_NAME'];
$page = substr($page, 1);

while($data = fgetcsv($meta_db, 9000, '|'))
{
    if($data[0] == $page)
    {
                $title = $data[1];
        $meta_keywords = $data[2];
        $meta_description = $data[3];
    }
}

?>

Taken from:

http://www.hawkee.com/snippet/3640/