Script PHP cerca stringa nella pagina

[brodik]

<?php

$file = file_get_contents('./prova.txt', FILE_USE_INCLUDE_PATH);
$array = explode("\n", $file);

foreach( $array as $var_temporanea ) {
    if(!empty($var_temporanea)){

        $ch = curl_init();
        $user_agent = "Mozilla/4.0 (compatible; MSIE 5.01; ".
                          "Windows NT 5.0)";
        $ch = curl_init();
        curl_setopt( $ch, CURLOPT_USERAGENT, $user_agent);
        curl_setopt( $ch, CURLOPT_HTTPGET, 1 );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
        curl_setopt( $ch, CURLOPT_FOLLOWLOCATION , 1 );
        curl_setopt( $ch, CURLOPT_FOLLOWLOCATION , 1 );
        curl_setopt( $ch, CURLOPT_URL, trim($var_temporanea) );
        curl_setopt( $ch, CURLOPT_REFERER, $ref );
        curl_setopt ($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
        $homepage = curl_exec($ch);
        curl_close($ch); 

        if(!strpos($homepage,'TESTO')){
            echo "Non trovato.
";
            file_put_contents("nontrovato.txt", $var_temporanea."\n", FILE_APPEND);

        }else{
            echo "Trovato!
";
            file_put_contents("trovato.txt", $var_temporanea."\n", FILE_APPEND);
        } 
    }
}

?>

EDIT: testato anche su wikipedia e funziona