WC_Product_Variation::get_title PHP Method

    public function get_title()
    {
        return apply_filters('woocommerce_product_title', $this->parent_data['title'], $this);
    }

function woocommerce_add_order_item()
{
    global $woocommerce, $wpdb;
    check_ajax_referer('add-order-item', 'security');
    $index = trim(stripslashes($_POST['index']));
    $item_to_add = trim(stripslashes($_POST['item_to_add']));
    $post = '';
    // Find the item
    if (is_numeric($item_to_add)) {
        $post = get_post($item_to_add);
    }
    if (!$post || $post->post_type !== 'product' && $post->post_type !== 'product_variation') {
        $post_id = $wpdb->get_var($wpdb->prepare("\n\t\t\tSELECT post_id\n\t\t\tFROM {$wpdb->posts}\n\t\t\tLEFT JOIN {$wpdb->postmeta} ON ({$wpdb->posts}.ID = {$wpdb->postmeta}.post_id)\n\t\t\tWHERE {$wpdb->postmeta}.meta_key = '_sku'\n\t\t\tAND {$wpdb->posts}.post_status = 'publish'\n\t\t\tAND {$wpdb->posts}.post_type = 'shop_product'\n\t\t\tAND {$wpdb->postmeta}.meta_value = %s\n\t\t\tLIMIT 1\n\t\t"), $item_to_add);
        $post = get_post($post_id);
    }
    if (!$post || $post->post_type !== 'product' && $post->post_type !== 'product_variation') {
        die;
    }
    if ($post->post_type == "product") {
        $_product = new WC_Product($post->ID);
    } else {
        $_product = new WC_Product_Variation($post->ID);
    }
    ?>
	<tr class="item" rel="<?php 
    echo $index;
    ?>
">
		<td class="product-id">
			<img class="tips" tip="<?php 
    echo '<strong>' . __('Product ID:', 'woocommerce') . '</strong> ' . $_product->id;
    echo '<br/><strong>' . __('Variation ID:', 'woocommerce') . '</strong> ';
    if (isset($_product->variation_id) && $_product->variation_id) {
        echo $_product->variation_id;
    } else {
        echo '-';
    }
    echo '<br/><strong>' . __('Product SKU:', 'woocommerce') . '</strong> ';
    if ($_product->sku) {
        echo $_product->sku;
    } else {
        echo '-';
    }
    ?>
" src="<?php 
    echo $woocommerce->plugin_url();
    ?>
/assets/images/tip.png" />
		</td>
		<td class="sku">
			<?php 
    if ($_product->sku) {
        echo $_product->sku;
    } else {
        echo '-';
    }
    ?>
			<input type="hidden" class="item_id" name="item_id[<?php 
    echo $index;
    ?>
]" value="<?php 
    echo esc_attr($_product->id);
    ?>
" />
			<input type="hidden" name="item_name[<?php 
    echo $index;
    ?>
]" value="<?php 
    echo esc_attr($_product->get_title());
    ?>
" />
			<input type="hidden" name="item_variation[<?php 
    echo $index;
    ?>
]" value="<?php 
    if (isset($_product->variation_id)) {
        echo $_product->variation_id;
    }
    ?>
" />
		</td>
		<td class="name">
		
			<div class="row-actions">
				<span class="trash"><a class="remove_row" href="#"><?php 
    _e('Delete item', 'woocommerce');
    ?>
</a> | </span>
				<span class="view"><a href="<?php 
    echo esc_url(admin_url('post.php?post=' . $_product->id . '&action=edit'));
    ?>
"><?php 
    _e('View product', 'woocommerce');
    ?>
</a>
			</div>
			
			<?php 
    echo $_product->get_title();
    ?>
			<?php 
    if (isset($_product->variation_data)) {
        echo '<br/>' . woocommerce_get_formatted_variation($_product->variation_data, true);
    }
    ?>
			<table class="meta" cellspacing="0">
				<tfoot>
					<tr>
						<td colspan="3"><button class="add_meta button"><?php 
    _e('Add&nbsp;meta', 'woocommerce');
    ?>
</button></td>
					</tr>
				</tfoot>
				<tbody class="meta_items"></tbody>
			</table>
		</td>
		
		<?php 
    do_action('woocommerce_admin_order_item_values', $_product);
    ?>
		
		<td class="tax_class" width="1%">
			<select class="tax_class" name="item_tax_class[<?php 
    echo $loop;
    ?>
]">
				<?php 
    $tax_classes = array_filter(array_map('trim', explode("\n", get_option('woocommerce_tax_classes'))));
    $classes_options = array();
    $classes_options[''] = __('Standard', 'woocommerce');
    if ($tax_classes) {
        foreach ($tax_classes as $class) {
            $classes_options[sanitize_title($class)] = $class;
        }
    }
    foreach ($classes_options as $value => $name) {
        echo '<option value="' . $value . '" ' . selected($value, $_product->get_tax_status(), false) . '>' . $name . '</option>';
    }
    ?>
			</select>
		</td>
		
		<td class="quantity" width="1%">
			<input type="text" name="item_quantity[<?php 
    echo $index;
    ?>
]" placeholder="<?php 
    _e('0', 'woocommerce');
    ?>
" value="1" size="2" class="quantity" />
		</td>
		
		<td class="line_subtotal" width="1%">
			<label><?php 
    _e('Cost', 'woocommerce');
    ?>
: <input type="text" name="line_subtotal[<?php 
    echo $index;
    ?>
]" placeholder="<?php 
    _e('0.00', 'woocommerce');
    ?>
" value="<?php 
    echo esc_attr(number_format($_product->get_price_excluding_tax(), 2, '.', ''));
    ?>
" class="line_subtotal" /></label>
			
			<label><?php 
    _e('Tax', 'woocommerce');
    ?>
: <input type="text" name="line_subtotal_tax[<?php 
    echo $index;
    ?>
]" placeholder="<?php 
    _e('0.00', 'woocommerce');
    ?>
" class="line_subtotal_tax" /></label>
		</td>
		
		<td class="line_total" width="1%">
			<label><?php 
    _e('Cost', 'woocommerce');
    ?>
: <input type="text" name="line_total[<?php 
    echo $index;
    ?>
]" placeholder="<?php 
    _e('0.00', 'woocommerce');
    ?>
" value="<?php 
    echo esc_attr(number_format($_product->get_price_excluding_tax(), 2, '.', ''));
    ?>
" class="line_total" /></label>
			
			<label><?php 
    _e('Tax', 'woocommerce');
    ?>
: <input type="text" name="line_tax[<?php 
    echo $index;
    ?>
]" placeholder="<?php 
    _e('0.00', 'woocommerce');
    ?>
" class="line_tax" /></label>
		</td>
		
	</tr>
	<?php 
    // Quit out
    die;
}