Get Word Count in a Web Page

Create a tool that counts the number of words on a web page. For any given URL, the tool will return the number of words displayed by a browser on the webpage (i.e. everything below the body tag).
When first run, it displays a form with three input boxes (allowing the user to test up to three URLs). When the form is submitted, the page submits back to itself. uses CURL to get the source for the webpages, then prints each URL along with the word count.


//get source of the url
function getContent ($url) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$output = curl_exec($ch);
curl_close ($ch) ;

//return the source of the url
return ($output) ;
}
//remove <script> and <style> tags from the body

function removetag($mystring,$opentag,$closetag){

//get the number of time a given tag repeat
$count=substr_count($mystring ,$closetag);

for($i=0;$i<$count;$i++) {

//starting tag position
$pos1 = stripos($mystring, $opentag);
//ending tag position $pos2 = stripos($mystring, $closetag);

if($pos1!==false) {

$len=strlen ($closetag);
$a=($pos2+$len)-strlen($mystring);
//remove starting tag,ending tag and tag content
$mystring=substr_replace($mystring, ' ', $pos1 , $a);
}

}
return $mystring;
}
//get the body of the source from whole source
function getBody($string)
{

$pos1 = stripos($string,"<body");
$pos2 = stripos($string,"</body>");
$string=substr($string,$pos1,($pos2-$pos1));
return $string;
}

function formatString($erg){

//remove all html tags in the body except <style> and <script>
$erg=strip_tags($erg,"<script><style>");
$erg=removetag($erg,"<style","</style>");
$erg=removetag($erg,"<script","</script>");
$erg = html_entity_decode($erg);
$erg=htmlspecialchars_decode($erg);
return($erg);
}

function getWordcount($url){

$erg = getContent($url) ;
$erg=getBody($erg);
$erg=formatString($erg);
$erg=str_word_count($erg);
return($erg);
}

function validateUrl($url){
//if url is blank
if(trim($url)!=""){
//check if http:// exist and add if not.
$pos=stripos($url,"http://");

if($pos===false)
{
$url="http://".$url;
}
//check the url is valid

if (preg_match('^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$i', $url)) {
return true;
}
else{

return false;
}
}
//if url is blank
else{
return false;
}
}



?>

All other functions call in function getWordcount. So to apply this code just call the getword count function and pas the url as the parameter.

Update content in a text file in PHP

Well its very straight forward to write content to a text file . But update a text fie is bit tricky. To update any thing you need to have a index. in text file you can use some part of the content as the index or reference. In this example the file content is image caption. its store caption for each image a gallery. and this script shows how to update those caption. Here the index or reference to update is caption. image name and caption separate by "|" symbol .

In this script file read and convert the content to array and create the updated string and write the whole thing back to the file.


$image_name="aa.jpg";
$filename="caption.txt";

//content put in to a array line by line
$lines = file($filename);
//seperate the caption and image name
foreach($lines as $l)
{
list($imgname, $captext) = explode("|", $l);
// crate associate array.index is image name, content is caption
$cap_array[$imgname] = $captext;
}
//update the new caption for the given image in the array
$cap_array[$image_name]=$cap;
// create the updated srting
foreach($cap_array as $key=>$val)
{

$str.=$key."|".$val;

}

unlink($filename);

if (!$handle = fopen($filename, 'a')) {
echo "Cannot open file ($filename)";
exit;
}

// Write the string back to the file
if (fputs($handle, $str) === FALSE) {
echo "Cannot write to file ($filename)";
exit;
}


?>

Kick Off

Hi every one......
Purpose of this blog is to share my PHP web development knowledge with other and get comments and feed back to enhance knowledge......