shorturl/process.php

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<?php
require('config.php');
function sort_array(&$array, $key, $order=SORT_DESC) {
$sort_keys = array();
foreach ($array as $key2 => $entry) {
$sort_keys[$key2] = $entry[$key];
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}
return array_multisort($sort_keys, $order, $array);
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}
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if(empty($_POST['url'])) {
header('location : index.php');
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}
else {
if (is_readable(DATA_FILE)) {
$data = unserialize(gzinflate(file_get_contents(DATA_FILE)));
}
else {
$data = array();
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}
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}
?>
<!DOCTYPE html>
<html lang="fr">
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<head>
<meta charset="utf-8">
<title>Shorten me !</title>
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<style type="text/css">
body {
text-align: center;
background-color: #333;
color: #DDD;
}
a:link, a:visited, a:hover, a:active {
color: yellow;
}
</style>
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</head>
<body>
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<h1><a href="index.php">It was too long !</a></h1>
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<?php
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if (isset($_POST['short']) && $_POST['short'] != "") {
$short = htmlspecialchars($_POST['short']);
}
else {
$short = dechex(crc32($_POST['url']));
}
if (isset($_POST['url']) && $_POST['url'] != "") {
$url = htmlspecialchars($_POST['url']);
$array = array("url"=>$url, "short"=>$short);
if (count($data) >= MAX_SAVED_URLS)
{
// Delete the first element
sort_array($data, 'timestamp');
array_shift($data);
}
// Store short link in the data array
$data[$short] = array('timestamp'=>time(), 'url'=>$url);
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// Save it in the file
file_put_contents(DATA_FILE, gzdeflate(serialize($data)));
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// Echoes the result
$new_url = BASE_URL.'/?'.$short;
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?>
<p>Your shorten URL:<br/>
<strong><a href="<?php echo $new_url ?>"><?php echo $new_url; ?></a></strong>
</p>
<p>Short link for: <?php echo '<a href="'.$url.'">'.$url.'</a>'; ?></p>
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<?php
}
else {
echo "<p>Missing URL. <a href='index.php'>Back to index page</a>.</p>";
}
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?>
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</body>
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</html>