(PHP 5 >= 5.2.2)
openssl_pkcs12_read — Parse a PKCS#12 Certificate Store into an array
$pkcs12
   , array &$certs
   , string $pass
   )
   openssl_pkcs12_read() parses the PKCS#12 certificate store supplied by
   pkcs12 into a array named
   certs.
  
pkcs12The certificate store contents, not its file name.
certsOn success, this will hold the Certificate Store Data.
passEncryption password for unlocking the PKCS#12 file.
   Returns TRUE on success or FALSE on failure.
  
Example #1 openssl_pkcs12_read() example
<?php
if (!$cert_store = file_get_contents("/certs/file.p12")) {
    echo "Error: Unable to read the cert file\n";
    exit;
}
if (openssl_pkcs12_read($cert_store, $cert_info, "my_secret_pass")) {
    echo "Certificate Information\n";
    print_r($cert_info);
} else {
    echo "Error: Unable to read the cert store.\n";
    exit;
}
?>