<form action='http://www.xxx.com/wp-content/xx/xx/recive.php' method='post'  class="my-form_recibos" target='hidden-form'>
 <label> <input type='checkbox' autocomplete="off" class="" name='enviarmail'    value='yes' >enviar pedido de recibos ?</label>

<input type="hidden" name="result" value="<?php $array_dos_pagamentos); ?>">

  <input type='Submit' value='Salvar'   onclick='saved(<?php echo $fid ?>)' />
</form>

Array ( [0] => Array ( [nome] => Claudia Mateus [total] => 20 [email] => claudiamateux@gmail.com ) [1] => Array ( [nome] => Joana Gonçalves [total] => 20 [email] => joanagoncalves95@hotmail.com ) [2] => Array ( [nome] => Paulo Abreu [total] => 20 [email] => pda9891@gmail.com ) )

<?
$json = json_encode($array_dos_pagamentos);
// Isto ira converter a array em json
?>
<input type="hidden" name="result" value="<?= htmlentities($json, ENT_QUOTES, 'UTF-8') ?>">

<?
$array = json_decode($_POST['result'], true);
// Isto irá tornar o JSON em array
?>

<?

$serialize = serialize($array_dos_pagamentos);
$hmac = hash_hmac('sha384', $serialize, 'SUA_SENHA');

$value = $hmac.$serialize;

?>
<input type="hidden" name="result" value="<?= htmlentities($value, ENT_QUOTES, 'UTF-8') ?>">

$value = $_POST['result'];

$hmac = mb_substr($value, 0, 96, '8bit');
$serialize = mb_substr($value, 96, null, '8bit');

if(hash_equals($hmac, hash_hmac('sha384', $serialize, 'SUA_SENHA'))){
    $array = unserialize($serialize);
}

<input type="hidden" name="result" value="<?php echo json_encode( $array_dos_pagamentos); ?>">

<?php
    $json = json_decode($_POST['result'], true) or die(json_last_error());
    echo '<pre>';
    print_r($json);