get_post_meta（）在订单电子邮件（woocommerce）内部无效

Question

I want to display the custom field value in order mail but its not showing inside the order mail while this is working with plugin(WooCommerce Email Test). Every custom field value are displaying here with this plugin.

This is my code (Inside email-order-details.php):

<tfoot>
        <?php
            if ( $totals = $order->get_order_item_totals() ) {
                $i = 0;
                foreach ( $totals as $total ) {
                    $i++;
                    ?>
                   <?php if($total['label'] == "Shipping:" || $total['label'] == "Verzending:"){ ?>

                   <?php } elseif($total['label'] == "Subtotal:" || $total['label'] == "Subtotaal:") {
                   $oid = $order->get_id(); ?>
                   <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Subtotaal"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php $order_st=get_post_meta($oid, 'order_subtotal', true); echo "<span class='woocommerce-Price-currencySymbol'>".get_woocommerce_currency_symbol()."</span>".$order_st."245.00"; ?></td>
                    </tr>
                    <?php $trans_method=get_post_meta($oid, 'trans_method', true); if($trans_method == 'pickup'){ ?>
                    <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Transportkosten"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "<span class='woocommerce-Price-currencySymbol'>".get_woocommerce_currency_symbol()."</span>0.00"; ?></td>
                    </tr>
                    <tr>
                        <td colspan="2" class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Afhalen"; ?></td>
                    </tr>
                    <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Totaal ex BTW"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php $teb=get_post_meta($oid, 'order_subtotal', true); echo "<span class='woocommerce-Price-currencySymbol'>".get_woocommerce_currency_symbol()."</span>".$teb; ?></td>
                    </tr>
                    <?php } ?>
                    <?php if($trans_method == 'deliverybypostcode'){ ?>
                    <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Transportkosten"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><span class="woocommerce-Price-currencySymbol"><?php $transcost=get_post_meta($oid, 'tran_cost', true); echo get_woocommerce_currency_symbol();  ?></span><?php echo money_format("%.2n", $transcost); ?></td>
                    </tr>
                    <tr><td colspan="2" class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Bezorgen op postcode:"; ?> <?php $postcode=get_post_meta($oid, 'trans_location', true);
                    $place_dis=get_post_meta($oid, 'trans_distance', true);
                    $mcrane=get_post_meta($oid, 'mounted_crane', true);
                     echo $postcode[0]." ".$place_dis."</br>";
    if($mcrane == "Yes"){
        echo "Transport: "."Met autolaadkraan"."</td></tr>";
    }else{
        echo "Transport: "."Zonder autolaadkraan"."</td></tr>";
    } ?>
    <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Totaal ex BTW"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php $os_total=get_post_meta($oid, 'order_subtotal', true);
                         $tcost=get_post_meta($oid, 'tran_cost', true);
                        $ot_cost=$os_total+money_format("%.2n", $tcost);
                          echo "<span class='woocommerce-Price-currencySymbol'>".get_woocommerce_currency_symbol()."</span>". money_format("%.2n", $ot_cost); ?></td>
                    </tr>
    <?php } ?>
                   <?php } elseif($total['label'] == "BTW:"){ 
                    $oid1 = $order->get_id();
                    ?>
                   <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo $total['label']; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php $ttax = get_post_meta($oid1, 'order_total_tax', true); echo "<span class='woocommerce-Price-currencySymbol'>".get_woocommerce_currency_symbol()."</span>".$ttax; ?></td>
                    </tr>
                     <?php } elseif($total['label'] == "Total:" || $total['label'] == "Totaal:"){ ?>
                     <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo "Totaal incl. BTW"; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo $total['value']; ?></td>
                    </tr>
                   <?php }else{ ?>
                    <tr>
                        <th class="td" scope="row" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo $total['label']; ?></th>
                        <td class="td" style="text-align:<?php echo $text_align; ?>; <?php echo ( 1 === $i ) ? 'border-top-width: 4px;' : ''; ?>"><?php echo $total['value']; ?></td>
                    </tr><?php }
                }
            }
        ?>
    </tfoot>

Please tell me what thing I am doing wrong here (Simply I just want to display custom fields value also inside order mail)

Answer 1

Actually, I was updating my custom values ​​on Thank You page due to which our custom value was updated in the database after sending the order email.

Therefore i am was not getting the custom value in the order mail.

Now I updated Our custom value before sending the order mail and it's working fine.

Thank's Guys for your response!