[Solved] Check if row in table is ‘equal’ to other row

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Try this:

<?php
if (!empty($_POST)) {
$code = $_POST['code'];
mysql_connect("$dbhost","$dbuser","$dbpass");
mysql_select_db("$dbname");
$result = mysql_query("SELECT * FROM files WHERE id=" . $code . " LIMIT 1");
if (mysql_num_rows($result) > 0) {
    while($rows = mysql_fetch_array($result)) {
         echo 'Exists';
         $url = $rows['url'];
    }
 } else {
    echo 'Does not exist';
 }
}
?>

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solved Check if row in table is ‘equal’ to other row