how to use elseif statement in dom php html find - php

Question

How to add statement, when I search and it doesnt exist on the url, it will show nothing.html?
$url1 = "http://www.pengadaan.net/tend_src_cont2.php?src_nm=";
$url2 = $_GET['src_nm']."&src_prop=";
$url3 = $_GET['src_prop'];
$url = $url1.$url2.$url3;
$html = file_get_html($url);
if (method_exists($html,"find")) {
echo "<ul>";
foreach($html->find('div[class=pengadaan-item] h1[] a[]') as $element ) {
echo ("<li>".$element."</li>");
}
echo "</ul>";
echo $url;
}
else {
}

Answer 1

There are two ways to move to another page in PHP. you can do header("Location: http://www.yourwebsite.com/nothing.php"); or you can have PHP echo JavaScript to do a reidrect (if you already defined your headers):
if (method_exists($html,"find")) { // If 'find exist'
...
} else { // Otherwise it does not exist
header("Location: http://www.pengadaan.net/nothing.php"); // redirect here
}
Or if you already sent you headers you can get around it using JavaScript:
...
} else {
echo '<script>window.location.replace("http://www.pengadaan.net/nothing.php")</script>';
}