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/* WordPress Shortcode Function rzh_cf7_GenNomor() */
/* Required Plugin: Contact Form 7 */
/* Add this function on functions.php theme or on your plugin */

function rzh_cf7_GenNomor() {
  $panjang = 10; // Length number generated
  $karakter = "0123456789"; // random character
  for ($p = 0; $p < $panjang; $p++) {
    $string .= $karakter[mt_rand(0,strlen($karakter)-1)];
  return $string;
add_shortcode('RZH_CF7_GEN_NOMOR', 'rzh_cf7_GenNomor');
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