help me, how to find text on an external html site using PHP

Posted on 16th Feb 2014 by admin

Would anyone know how to search an external html file for a work or phrase ?

I was thinking something like this --
I use script cURL...

Code: <?php
if (isset($_POST['submitted'])) {

$xurl_1 = $_POST['url_1'];
$xtext_1 = $_POST['text_1'];

function check_1($url_1, $text_1){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url_1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
$result=curl_exec ($ch);
curl_close ($ch);

preg_match ("|<[pP]>".$text_1."</[pP]>|i", $result, $matches);

if (count($matches)>0){
$i=true;
}else{
$i=false;
}
return $i;
}

if(check_1( $xurl_1, $xtext_1)){
echo "Text found";
}else{
echo "Text not found";
}

} else {
?>

<h3>Link Verifier</h3>
<form action="<?php $_SERVER['PHP_SELF']; ?>" method="post">
<p><b>URL :</b> <input type="text" name="url_1" size="30" value="" /></p>
<p><b> Exist :</b> <input type="text" name="text_1" size="30" value="" /></p>
<div align="center"><input type="submit" name="submit" value="Check" /></div>
<input type="hidden" name="submitted" value="TRUE" />
</form>
<?php
}
?>

Unfortunently, that doesn't work..

it say:
Quote"Fatal error: Call to undefined function curl_init() in /home/*/*/new.php on line 8"

how to install cURL on windows?