在EOT内插入php代码

有两个表,product和productcolor.每个产品可以有多种颜色.我想在下拉菜单中获取产品的颜色.但是无法使用以下代码来做到这一点.

 <?PHP
    $results = $MysqLi->query("SELECT product_code, product_name, product_desc, product_img_name, price FROM products ORDER BY id ASC");
    if($results){ 
    $products_item = '<ul class="products">';
    //fetch results set as object and output HTML
    while($obj = $results->fetch_object())
    {  
        $id = $obj->id;
        $results1 = $MysqLi->query("SELECT colornmae FROM productcolor where id=$id");
      if($results1){ 
        while($obj1 = $results1->fetch_object())
        {  
        $color[] = $obj1->colorname;
        }
      }
    $products_item .= <<<EOT
        <li class="product">
        <form method="post" action="cart_update.PHP">
        <div class="product-content"><h3>{$obj->product_name}</h3>
        <div class="product-thumb"><img src="images/{$obj->product_img_name}"></div>
        <div class="product-desc">{$obj->product_desc}</div>
        <div class="product-info">
        Price {$currency}{$obj->price} 

        <fieldset>

        <label>
            <span>Color</span>
            <select name="product_color">
            foreach ($color as $value) {
            <option value="{$value}">{$value}</option>
            }
            </select>
        </label>

        <label>
            <span>Quantity</span>
            <input type="text" size="2" maxlength="2" name="product_qty" value="1" />
        </label>

        </fieldset>
        <input type="hidden" name="product_code" value="{$obj->product_code}" />
        <input type="hidden" name="type" value="add" />
        <input type="hidden" name="return_url" value="{$current_url}" />
        <div align="center"><button type="submit" class="add_to_cart">Add</button></div>
        </div></div>
        </form>
        </li>
    EOT;
    }
    $products_item .= '</ul>';
    echo $products_item;
    }
    ?>    

我已经寻找解决方案.然后我才知道PHP代码无法用EOT编写. PHP变量可以在EOT中显示.但在这里我想循环到数据库中颜色的值.我尝试了各种组合,但是没有用.以上是我做不成功的尝试之一.

如何在下拉菜单中获取产品的颜色名称,该下拉菜单是从数据库中作为EOT之间的对象获取的？

有人可以帮我吗？

解决方法:

确保你 ：

>与EOT在同一行上没有任何其他字符(包括空格字符)；声明.
>字符串中没有任何PHP表达式.仅允许变量,并且它们必须具有{$variable}格式.

为了使代码更具可读性,还应该修复缩进！

此代码应工作：

<?PHP
$results = $MysqLi->query("SELECT product_code, product_name, product_desc, product_img_name, price FROM products ORDER BY id ASC");
if($results){ 
    $products_item = '<ul class="products">';
    //fetch results set as object and output HTML
    while($obj = $results->fetch_object()) {  
        $id = $obj->id;
        $results1 = $MysqLi->query("SELECT colorname FROM productcolor where id=$id");
        $color = array();
        if($results1){ 
            while($colorvalue = $results1->fetch_object()) {  
                $color[] = $colorvalue->colorname;
            }
        }
        $products_item .= <<<EOT
    <li class="product">
        <form method="post" action="cart_update.PHP">
            <div class="product-content">
                <h3>{$obj->product_name}</h3>
                <div class="product-thumb">
                    <img src="images/{$obj->product_img_name}">
                </div>
                <div class="product-desc">
                    {$obj->product_desc}
                </div>
                <div class="product-info">
                    Price {$currency}{$obj->price} 

                    <fieldset> 
                        <label>
                            <span>Color</span>
                            <select name="product_color">
EOT;
        foreach ($color as $value) {
        $products_item .= <<<EOT
                                <option value="{$value}">{$value}</option>
EOT;
        }
        $products_item .= <<<EOT
                            </select>
                        </label>

                        <label>
                            <span>Quantity</span>
                            <input type="text" size="2" maxlength="2" name="product_qty" value="1" />
                        </label>

                    </fieldset>
                    <input type="hidden" name="product_code" value="{$obj->product_code}" />
                    <input type="hidden" name="type" value="add" />
                    <input type="hidden" name="return_url" value="{$current_url}" />
                    <div align="center">
                        <button type="submit" class="add_to_cart">Add</button>
                    </div>
                </div>
            </div>
        </form>
    </li>
EOT;
    }
    $products_item .= '</ul>';
    echo $products_item;
}
?>    

作为将字符串拆分为位的替代方法,可以将表达式放在单独的函数/方法中,并将其输出作为变量包括在内.

此代码也应该起作用：

<?PHP
function print_colors($color) {
    $returnstring = "";
    foreach ($color as $value) {
        $returnstring .= "<option value=\"{$value}\">{$value}</option>";
    }
    return $returnstring;
}

$results = $MysqLi->query("SELECT product_code, product_name, product_desc, product_img_name, price FROM products ORDER BY id ASC");
if($results){ 
    $products_item = '<ul class="products">';
    //fetch results set as object and output HTML
    while($obj = $results->fetch_object()) {  
        $id = $obj->id;
        $results1 = $MysqLi->query("SELECT colorname FROM productcolor where id=$id");
        $color = array();
        if($results1){ 
            while($colorvalue = $results1->fetch_object()) {  
                $color[] = $colorvalue->colorname;
            }
        }
        $products_item .= <<<EOT
    <li class="product">
        <form method="post" action="cart_update.PHP">
            <div class="product-content">
                <h3>{$obj->product_name}</h3>
                <div class="product-thumb">
                    <img src="images/{$obj->product_img_name}">
                </div>
                <div class="product-desc">
                    {$obj->product_desc}
                </div>
                <div class="product-info">
                    Price {$currency}{$obj->price} 

                    <fieldset> 
                        <label>
                            <span>Color</span>
                            <select name="product_color">
                                {print_colors($color)}
                            </select>
                        </label>

                        <label>
                            <span>Quantity</span>
                            <input type="text" size="2" maxlength="2" name="product_qty" value="1" />
                        </label>

                    </fieldset>
                    <input type="hidden" name="product_code" value="{$obj->product_code}" />
                    <input type="hidden" name="type" value="add" />
                    <input type="hidden" name="return_url" value="{$current_url}" />
                    <div align="center">
                        <button type="submit" class="add_to_cart">Add</button>
                    </div>
                </div>
            </div>
        </form>
    </li>
EOT;
    }
    $products_item .= '</ul>';
    echo $products_item;
}
?>