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get_post_meta() unserialize issue - retunsreturns boolean(false)

I´mI'm using a simple custom plugin that parses and saves external XML data as a serialized array in a custom field. This works fine, however, when I update the post, instead of the array I only see a message saying: "bool(false)". I guess it has to with serialize / unserialize but didn't find any clues.

get_post_meta unserialize issue - retuns boolean(false)

I´m using a simple custom plugin that parses and saves external XML data as a serialized array in a custom field. This works fine, however, when I update the post, instead of the array I only see a message saying: "bool(false)". I guess it has to with serialize / unserialize but didn't find any clues.

get_post_meta() unserialize issue - returns boolean(false)

I'm using a simple custom plugin that parses and saves external XML data as a serialized array in a custom field. This works fine, however, when I update the post, instead of the array I only see a message saying: "bool(false)". I guess it has to with serialize / unserialize but didn't find any clues.

    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
    Bumped by Community user
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get_post_meta unserialize issue - retuns boolean(false)

I´m using a simple custom plugin that parses and saves external XML data as a serialized array in a custom field. This works fine, however, when I update the post, instead of the array I only see a message saying: "bool(false)". I guess it has to with serialize / unserialize but didn't find any clues.

I needed to serialize when I update post meta using update_post_meta($post_id, 'tb_data', serialize($new_value_array)); By omitting serialize like update_post_meta($post_id, 'tb_data', $new_value_array); doesn't store any data in custom field. Furthermore, I have to use maybe_unserialize(get_post_meta($post->ID, 'tb_data', true)); to print the results.

There are 2 custom fields, (1) tb_item_group_id and (2) tb_data. Value of tb_data will be added using the below function,

Function I am using to update post meta is as below.

function parse_file_func($title) {
    // get_tickets_array();exit;
    $language = explode('-', get_bloginfo('language'));
    $language = $language[0];
    $file = file_get_contents('https://dl.dropboxusercontent.com/u/12344450/feed.xml');
    if (!$file) {
        exit;
    }
    $domObj = new xmlToArrayParser($file);
    $domArr = $domObj->array;
    if (($domObj->parse_error)) {
        echo $domObj->get_xml_error();
    } else {
        $first = $domArr['rss']['channel']['item'];
        foreach ($first as $item) {
            if ($item['languageCode'] == $language) {
                $args = array(
                    'meta_key' => 'tb_item_group_id',
                    'meta_value' => $item['g:item_group_id'],
                    'post_type' => 'tickets',
                );
                $post = get_posts($args);
                if (empty($post)) {
                    continue;
                } else {
                    $args = array(
                        'meta_key' => 'tb_item_group_id',
                        'meta_value' => $item['g:item_group_id'],
                        'post_type' => 'tickets',
                    );
                    $post = get_posts($args);
                    $post_id = $post[0]->ID;
                    $meta_values = get_post_meta($post_id, 'tb_data');
                    if (empty($meta_values)) {
                        $new_value_array = array();
                        unset($item['cdata']);
                        $new_value_array['tb_' . $item['g:item_group_id'] . '_' . $item['ticketID']] = $item;
                    }
                    else {
                        $meta_arrays = unserialize($meta_values[0]);
                        $new_value_array = $meta_arrays;
                        foreach ($meta_arrays as $meta_ticketbar => $tb_content) {
                            if ($meta_ticketbar == 'tb_' . $item['g:item_group_id'] . '_' . $item['ticketID']) {
                                unset($item['cdata']);
                                $new_value_array[$meta_ticketbar] = $item;
                            } else {
                                $new_value_array = $meta_arrays;
                                unset($item['cdata']);
                                $new_value_array['tb_' . $item['g:item_group_id'] . '_' . $item['ticketID']] = $item;
                            }
                        }
                    }
                    update_post_meta($post_id, 'tb_data', serialize($new_value_array));
                    // update_post_meta($post_id, 'tb_data', base64_encode($new_value_array));
                }
            } else {
                continue;
            }
        }
    }
}

and displaying on front-end using get_post_meta

<?php
    // $tb_meta = get_post_meta($post->ID, 'tb_data', true);
    $tb_meta = get_post_meta($post->ID, 'tb_data', true);
    $tb_meta_unserialized = maybe_unserialize( $tb_meta );
?>
<pre><?php
    // print_r ($tb_meta_unserialized);
    var_dump($tb_meta_unserialized);
?></pre>