<?php
/*
 This code is used for get the keywords from the
 Google HotTrens.U can use the grabtrends() to get
 the curerent trends words. it return an array of keywords
 u can change the $url to get coountry specific keywords
 ex: $url = "http://www.google.co.in/trends/hottrends";
 gives the INDIAN keywords

*/

//---- this function returns the keywords---
function grabtrends()
{
	$url = "http://www.google.com/trends/hottrends";
	global $trendurl;
	$url=$trendurl;
	$arr = curlgrab($url);

	$pattern = '|&sa=X">(.*?)</a>|';
	$matches = null;
	preg_match_all( $pattern, $arr['page'], $matches );

	return $matches[1]; // output is an array of key words
}

//---- functio to get data from a website--/
function curlgrab( $url, $ch = null ) {

	if( $ch != null ) {
	     curl_setopt( $ch, CURLOPT_URL, $url );
	}
	 else
	 {
	    $ch = curl_init( $url );
	    curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
	    curl_setopt( $ch, CURLOPT_COOKIEJAR, 'cookies.txt' );
	    curl_setopt( $ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01;Windows NT 5.0)" );
 	  }

$arr[ 'ch' ] = $ch;
$arr[ 'page' ] = curl_exec( $ch );
return $arr;
}
?>

To test this code use this

// include the above code 

$out=grabtrends();
echo '<h2>Google Trends Keywords</h2>';

foreach($out as $keyword)
       echo "<h3>".$keyword."</h3>";