function to scrape page keywords , description and title? - php

Question

i wrote simple 3 functions to scrape titles , description and keywords of simple html page
this is the first function to scrape titles
function getPageTitle ($url)
{
$content = $url;
if (eregi("<title>(.*)</title>", $content, $array)) {
$title = $array[1];
return $title;
}
}
and it works fine
and those are 2 functions to scrape description and keywords and those not working
function getPageKeywords($url)
{
$content = $url;
if ( preg_match('/<meta[\s]+[^>]*?name[\s]?=[\s\"\']+keywords[\s\"\']+content[\s]?=[\s\"\']+(.*?)[\"\']+.*?>/i', $content, $array)) {
$keywords = $array[1];
return $keywords;
}
}
function getPageDesc($url)
{
$content = $url;
if ( preg_match('/<meta[\s]+[^>]*?name[\s]?=[\s\"\']+description[\s\"\']+content[\s]?=[\s\"\']+(.*?)[\"\']+.*?>/i', $content, $array)) {
$desc = $array[1];
return $desc;
}
}
i know there may be something wrong with the preg_match line but i really don't know
i tried it so much things but it doesn't work

Answer 1

Why not use get_meta_tags? PHP Documentation Here
<?php
// Assuming the above tags are at www.example.com
$tags = get_meta_tags('http://www.example.com/');
// Notice how the keys are all lowercase now, and
// how . was replaced by _ in the key.
echo $tags['author']; // name
echo $tags['keywords']; // php documentation
echo $tags['description']; // a php manual
echo $tags['geo_position']; // 49.33;-86.59
?>
NOTE You can change the parameter to either a URL, local file or string.

Answer 2

Its better to use php's native DOMDocument to parse HTML then regex, you can also use , tho in this day in age allot of sites dont even add the keywords, description tags no more, so you cant rely on them always being there. But here is how you can do it with DOMDocument:
<?php
$source = file_get_contents('http://php.net');
$dom = new DOMDocument("1.0","UTF-8");
#$dom->loadHTML($source);
$dom->preserveWhiteSpace = false;
//Get Title
$title = $dom->getElementsByTagName('title')->item(0)->nodeValue;
$description = '';
$keywords = '';
foreach($dom->getElementsByTagName('meta') as $metas) {
if($metas->getAttribute('name') =='description'){ $description = $metas->getAttribute('content'); }
if($metas->getAttribute('name') =='keywords'){ $keywords = $metas->getAttribute('content'); }
}
print_r($title);
print_r($description);
print_r($keywords);
?>