Check CSR Details

csr.php

<h3>Check CSR Details</h3>
<form method="post">
<p>Paste the CSR in the text area below:</p>
<textarea rows="16" cols="65" name="csr">
</textarea>
<br />
<input type="submit" />
</form>
<hr noshade />
<?php 
if (isset($_POST['csr']) && strlen($_POST['csr'])){
  $csr = $_POST['csr'];
	
	$csr_detail = openssl_csr_get_subject($csr);
	if (is_array($csr_detail)){
		echo "<h3>CSR Results</h3><ul>";
		foreach ($csr_detail as $key => $value) {
			switch ($key) {
				case "C": $key = "Country"; break;
				case "L": $key = "Location"; break;
				case "O": $key = "Organisation"; break;
				case "CN": $key = "Common Name"; break;
				default: break;
			}
			echo "<li>".$key." = ".$value."</li>";
		}
		echo "</ul>";
	}
} else {
	echo "No CSR detail submitted.";
}
?>