Código PHP:
<?php
$the_url = isset($_REQUEST['url']) ? htmlspecialchars($_REQUEST['url']) : '';
?>
<form method="post">
Escribe la direccion URL completa de la pagina a extraer (incluyendo http://):<br />
<input type="text" name="url" size="65" value="<?php echo $the_url; ?>"/><br />
<br />
<br />
<input type="submit" value="Parse Emails" />
</form>
<?php
if (isset($_REQUEST['url']) && !empty($_REQUEST['url'])) {
// fetch data from specified url
$text = file_get_contents($_REQUEST['url']);
}
// parse emails
if (!empty($text)) {
$res = preg_match_all(
"/[a-z0-9]+([_\\.-][a-z0-9]+)*@([a-z0-9]+([\.-][a-z0-9]+)*)+\\.[a-z]{2,}/i",
$text,
$matches
);
if ($res) {
foreach(array_unique($matches[0]) as $email) {
echo $email . "<br />";
}
}
else {
echo "No emails found.";
}
}
?>