从 PHP for 循环创建有效的 JSON 输出答案

【问题标题】：Creating a valid JSON output from PHP for loops从 PHP for 循环创建有效的 JSON 输出
【发布时间】：2016-01-11 09:55:50
【问题描述】：

在从 php for 循环中获取有效 JSON 输出时遇到了一些问题，这是我的 JSON：

[{"title":"One Colour ($2.45)","price":"($2.45)"},{"title":"Two Colours ($3.35)","price":"($3.35)"},{"title":"Three Colours ($4.25)","price":"($4.25)"}],[{"title":"One Colour ($2.45)","price":"($2.45)"},{"title":"Two Colours ($3.35)","price":"($3.35)"},{"title":"Three Colours ($4.25)","price":"($4.25)"},{"title":"One Colour ($3.05)","price":"($3.05)"},{"title":"Two Colours ($4.35)","price":"($4.35)"},{"title":"Three Colours ($5.75)","price":"($5.75)"}],

这是我创建 json 输出的 php 循环

foreach ( $product_addons as $addon ) {


    foreach ( $addon['options'] as $option ) :

        $loop ++;
        switch ($qty) {
            case ($qty < 20):
                $price = $option['price'] > 0 ? ' (' . wc_price( get_product_addon_price_for_display( $option['price'] ) ) . ')' : '';
                $title = strip_tags($option['label']. $price);


            break;
            case ($qty > 20 && $qty < 35):
                $price = $option['discount'] > 0 ? ' (' . wc_price( get_product_addon_price_for_display( $option['discount'] ) ) . ')' : '';
                $title = strip_tags($option['label']. $price);
            break;


        }

        $select_text[] = array( 
                'title' => trim($title),
                'price' => trim(strip_tags($price)),
        );



    endforeach;
    echo json_encode($select_text).",";
}

我现在遇到的问题是 JSON 输出现在有效，我不知道如何改进它。

【问题讨论】：

标签： php json for-loop

【解决方案1】：

根据https://jsonformatter.curiousconcept.com/的问题是

多个 JSON 根元素

解决方案是将所有内容放入 1 个嵌入数组中：

[  
   [  
      {  
         "title":"One Colour ($2.45)",
         "price":"($2.45)"
      },
      {  
         "title":"Two Colours ($3.35)",
         "price":"($3.35)"
      },
      {  
         "title":"Three Colours ($4.25)",
         "price":"($4.25)"
      }
   ],
   [  
      {  
         "title":"One Colour ($2.45)",
         "price":"($2.45)"
      },
      {  
         "title":"Two Colours ($3.35)",
         "price":"($3.35)"
      },
      {  
         "title":"Three Colours ($4.25)",
         "price":"($4.25)"
      },
      {  
         "title":"One Colour ($3.05)",
         "price":"($3.05)"
      },
      {  
         "title":"Two Colours ($4.35)",
         "price":"($4.35)"
      },
      {  
         "title":"Three Colours ($5.75)",
         "price":"($5.75)"
      }
   ]
]

和 2：在线 echo json_encode($select_text).","; 为什么要添加尾随逗号？

【讨论】：

谢谢你 - 我使用了你的建议并查看了另一个线程以提出解决方案

【解决方案2】：

通过查看此线程最终弄清楚了： create multidimensional array using a foreach loop

基本上我需要做的就是在多维数组中使用第一个 foreach 循环的索引。这是我的最终代码：

foreach ( $product_addons as $key => $addon ) {

    foreach ( $addon['options'] as $option ) :

        $loop ++;
        switch ($qty) {
            case ($qty < 20):
                $price = $option['price'] > 0 ? ' (' . wc_price( get_product_addon_price_for_display( $option['price'] ) ) . ')' : '';
                $title = strip_tags($option['label']. $price);

            break;
            case ($qty > 20 && $qty < 35):
                $price = $option['discount'] > 0 ? ' (' . wc_price( get_product_addon_price_for_display( $option['discount'] ) ) . ')' : '';
                $title = strip_tags($option['label']. $price);
            break;

        }

        $title = trim($title);

         // Add in your custom fields or WP fields that you want
         $locations[$key][] = array(
           'title' => $title,

         );

    endforeach; 
}
echo json_encode($locations);

【讨论】：