- print_r: documentation ( source)
<?php
// Create the keypair
$res=openssl_pkey_new();
// Get private key
openssl_pkey_export($res, $privkey);
// Get public key
$pubkey=openssl_pkey_get_details($res);
$pubkey=$pubkey["key"];
print_r($pubkey);
print_r("\n<br>\n");
print_r($privkey);