I am trying to get this Keyword Density Analysis script to work and it won't. I have tried a few things, but I am really not that great at Php, so can some please help me or tell me why this won't work and how to fix it?
<?php

function kda($url)
{

if(!stristr($url, 'http://'))
{
$url = 'http://'.$url;
}

if($html = @file_get_contents($url))
{
$html = html_entity_decode(file_get_contents($url));
//preg_match('/(?<=<title>).*?(?=<\\/title>)/is', $html, $matches);
//$title = array_shift($matches);

$meta_tags = get_meta_tags($url);
$html = kda_strip_tag_script($html);
$no_html = strip_tags($html);

$tag_info = $meta_tags['description']." ".$meta_tags['keywords'];
$text .= $tag_info." ".$no_html;
$total = count(explode(' ', $text));

$text = kda_clean(kda_stopWords($text));
$words = explode(' ', $text);
$total = count($words);
for($x=0; $x<$total; $x++)
{
$words[$x] = trim($words[$x]);
if($words[$x]!='')
{
$ws[$words[$x]]++;
if(trim($words[$x+1])!='')
{
$phrase2 = $words[$x]." ".trim($words[$x+1]);
$ws[$phrase2]++;
if(trim($words[$x+2])!='')
{
$phrase3 = $words[$x]." ".trim($words[$x+1])." ".trim($words[$x+2]);
$ws[$phrase3]++;
}
}
}

}
foreach($ws as $word=>$count)
{
if( ($count>1) and (strlen($word)>2) )
{
$phrase_size = count(explode(' ', $word));
$occurances[$phrase_size] = $occurances[$phrase_size] + $count;
}
}

foreach($ws as $word=>$count)
{
if( ($count>1) and (strlen($word)>2) )
{
$phrase_size = count(explode(' ', $word));
$density = round( ($count/$occurances[$phrase_size])*100, 2);
$dens[$phrase_size][$word] = $density;
}
}

arsort($dens[1]);
if($dens[2])
{
arsort($dens[2]);
}
if($dens[3])
{
arsort($dens[3]);
}


$return = array('dens'=>$dens, 'occurances'=>$occurances);
/*
echo "<pre>";
print_r($occurances);
print_r($dens);
*/
return $return ;
}else {
return false;
}
}
function kda_strip_tag_script($html) {
$pos1 = false;
$pos2 = false;
do {
if ($pos1 !== false && $pos2 !== false) {
$first = NULL;
$second = NULL;
if ($pos1 > 0)
$first = substr($html, 0, $pos1);
if ($pos2 < strlen($html) - 1)
$second = substr($html, $pos2);
$html = $first . $second;
}
preg_match("/<script[^>]*>/i", $html, $matches);
$str1 =& $matches[0];
preg_match("/<\/script>/i", $html, $matches);
$str2 =& $matches[0];
$pos1 = strpos($html, $str1);
$pos2 = strpos($html, $str2);
if ($pos2 !== false)
$pos2 += strlen($str2);
} while ($pos1 !== false && $pos2 !== false);
return $html;
}
function kda_clean($text)
{
global $stopwords_file;
$text = str_replace('.', '', $text);
$text = str_replace(',', '', $text);
$text = str_replace('(', '', $text);
$text = str_replace(')', '', $text);
$text = str_replace('_', '', $text);
$text = str_replace('*', '', $text);
$text = str_replace('"', '', $text);
$text = str_replace('-', '', $text);
$text = str_replace("!", '', $text);
$text = str_replace("?", '', $text);
$text = str_replace("\n", '', $text);
$text = str_replace('/', '', $text);
$text = str_replace('’', "'", $text);

return trim(strtolower($text));
}
function kda_stopWords($term)
{
global $sw_count;
//load list of common words
$common = file('kdawords.txt');
$total = count($common);
for ($x=0; $x<= $total; $x++)
{
$common[$x] = trim(strtolower($common[$x]));
}

//make array of search terms
$_terms = explode(" ", $term);

foreach ($_terms as $line)
{
if (in_array(strtolower(trim($line)), $common))
{
$removeKey = array_search($line, $_terms);
$sw_count++;
unset($_terms[$removeKey]);
}
else
{
$clean_term .= " ".$line;
}
}
return $clean_term;
}

?>

You can see a like Keyword Density Analysis script at Link Exchange it

mikey,

When you say the script "doesn't work," could you be more specific? Are you getting an error, bad results, causing your machine to crash and emit radiation? Also, could you briefly explain the algorithm you are trying to implement -- (i.e., what do you want the code to do?).

And please paste your code within the [php ][/php ] tags (without spaces). This will preserve indentation and make it easier to read with syntax highlighting.

Sorry, I am new to all of this. I don't get no warnings, I just get a blank page.

This code will allow other webmasters to put their (or someone elses site) URL in a little box, then when they hit submit it will show the keyword Density of that page they put in the box for SEO.

PHP Code:

<?php 

function kda($url) 
{ 

if(!stristr($url, 'http://')) 
{ 
$url = 'http://'.$url; 
} 

if($html = @file_get_contents($url)) 
{ 
$html = html_entity_decode(file_get_contents($url)); 
//preg_match('/(?<=<title>).*?(?=<\\/title>)/is', $html, $matches); 
//$title = array_shift($matches); 

$meta_tags = get_meta_tags($url); 
$html = kda_strip_tag_script($html); 
$no_html = strip_tags($html); 

$tag_info = $meta_tags['description']." ".$meta_tags['keywords']; 
$text .= $tag_info." ".$no_html; 
$total = count(explode(' ', $text)); 

$text = kda_clean(kda_stopWords($text)); 
$words = explode(' ', $text); 
$total = count($words); 
for($x=0; $x<$total; $x++) 
{ 
$words[$x] = trim($words[$x]); 
if($words[$x]!='') 
{ 
$ws[$words[$x]]++; 
if(trim($words[$x+1])!='') 
{ 
$phrase2 = $words[$x]." ".trim($words[$x+1]); 
$ws[$phrase2]++; 
if(trim($words[$x+2])!='') 
{ 
$phrase3 = $words[$x]." ".trim($words[$x+1])." ".trim($words[$x+2]); 
$ws[$phrase3]++; 
} 
} 
} 

} 
foreach($ws as $word=>$count) 
{ 
if( ($count>1) and (strlen($word)>2) ) 
{ 
$phrase_size = count(explode(' ', $word)); 
$occurances[$phrase_size] = $occurances[$phrase_size] + $count; 
} 
} 

foreach($ws as $word=>$count) 
{ 
if( ($count>1) and (strlen($word)>2) ) 
{ 
$phrase_size = count(explode(' ', $word)); 
$density = round( ($count/$occurances[$phrase_size])*100, 2); 
$dens[$phrase_size][$word] = $density; 
} 
} 

arsort($dens[1]); 
if($dens[2]) 
{ 
arsort($dens[2]); 
} 
if($dens[3]) 
{ 
arsort($dens[3]); 
} 


$return = array('dens'=>$dens, 'occurances'=>$occurances); 
/* 
echo "<pre>"; 
print_r($occurances); 
print_r($dens); 
*/ 
return $return ; 
}else { 
return false; 
} 
} 
function kda_strip_tag_script($html) { 
$pos1 = false; 
$pos2 = false; 
do { 
if ($pos1 !== false && $pos2 !== false) { 
$first = NULL; 
$second = NULL; 
if ($pos1 > 0) 
$first = substr($html, 0, $pos1); 
if ($pos2 < strlen($html) - 1) 
$second = substr($html, $pos2); 
$html = $first . $second; 
} 
preg_match("/<script[^>]*>/i", $html, $matches); 
$str1 =& $matches[0]; 
preg_match("/<\/script>/i", $html, $matches); 
$str2 =& $matches[0]; 
$pos1 = strpos($html, $str1); 
$pos2 = strpos($html, $str2); 
if ($pos2 !== false) 
$pos2 += strlen($str2); 
} while ($pos1 !== false && $pos2 !== false); 
return $html; 
} 
function kda_clean($text) 
{ 
global $stopwords_file; 
$text = str_replace('.', '', $text); 
$text = str_replace(',', '', $text); 
$text = str_replace('(', '', $text); 
$text = str_replace(')', '', $text); 
$text = str_replace('_', '', $text); 
$text = str_replace('*', '', $text); 
$text = str_replace('"', '', $text); 
$text = str_replace('-', '', $text); 
$text = str_replace("!", '', $text); 
$text = str_replace("?", '', $text); 
$text = str_replace("\n", '', $text); 
$text = str_replace('/', '', $text); 
$text = str_replace('’', "'", $text); 

return trim(strtolower($text)); 
} 
function kda_stopWords($term) 
{ 
global $sw_count; 
//load list of common words 
$common = file('kdawords.txt'); 
$total = count($common); 
for ($x=0; $x<= $total; $x++) 
{ 
$common[$x] = trim(strtolower($common[$x])); 
} 

//make array of search terms 
$_terms = explode(" ", $term); 

foreach ($_terms as $line) 
{ 
if (in_array(strtolower(trim($line)), $common)) 
{ 
$removeKey = array_search($line, $_terms); 
$sw_count++; 
unset($_terms[$removeKey]); 
} 
else 
{ 
$clean_term .= " ".$line; 
} 
} 
return $clean_term; 
} 

?>

mikey,

I looked through the code and didn't find any instance where something was printed to the screen. I didn't evaluate the functionality of the code there, but are you sure it is not working?

Ditto Kyrnt's response,

The only code that I can see would print anything to the webpage has been commented out: -

PHP Code:

/* 
echo "<pre>"; 
print_r($occurances); 
print_r($dens); 
*/ 


What happens if you un comment this?

Ian.

It doesn't do anything when I on comment it and it has not worked since I got, but try to mess with it more.

Thanks foe the help guys!

Do you really need your own keyword density script? I mean there are hundreds of sites out there that already offer free keyword density analyzers to visitors. Maybe it would be easier to just use one of those for now. As you said, you're "really not that great at Php", I commend you for attempting such a project, but perhaps this isn't the easiest thing for a newcomer to PHP to undertake.

Originally Posted by cmonkey

Do you really need your own keyword density script? I mean there are hundreds of sites out there that already offer free keyword density analyzers to visitors. Maybe it would be easier to just use one of those for now. As you said, you're "really not that great at Php", I commend you for attempting such a project, but perhaps this isn't the easiest thing for a newcomer to PHP to undertake.

How else do you we learn more advanced things? I commend you for trying and say keep up the good work.

Hi Mikey

What bits did you "mess with"? Did you save the original code? There is nothing to display in the sample code above.

I'm not trying to teach you how to suck eggs, but, when you're gonna mess with code and you're not sure, back up the original!

Best wishes ~ Kenny

It's the original one, I think the problem with it is that it's not calling the Functions, I tried a few things...

1) $url = $_GET["url"];.
2) print_r ($words); and tried a few another prints such as $meta_tags.
3) Taking the comments out.
4) changing the form to php and used both post and get in the form.

There are a few another things I used, but these are the biggest.

Also I won't be using this for my self it will be for my visitors, so this will add more and better content to my site. They say content is king once you get the visitors to your site, but it will also help make a better theme for my site when search engines spider my site.

How else do you we learn more advanced things? I commend you for trying and say keep up the good work

Thanks, I should learn it fast, I hope anyway!