如何构建PHP数组并转JSON以生成指定格式的JSON字符串

需要生成如下格式的JSON字符串：

{
  "value": [
    "01GQSE92030S8MNA78WQZ09JJQ",
    "{
\"user_id\": \"{{current_user.id}}\",
\"user_phone\": \"{{current_user.phone}}\",
\"ticket_id\": \"{{ticket.id}}\",
\"ticket_comment\": \"{{ticket.latest_comment}}\",
\"ticket_comment_author\": \"{{ticket.latest_comment.author.name}}\",
\"organization_id\": \"{{ticket.organization.external_id}}\",
\"organization_name\": \"{{ticket.organization.name}}\",
\"requester_name\": \"{{ticket.requester.name}}\",
\"requester_phone\": \"{{ticket.requester.phone}}\"
}"
  ]
}

注意：目标JSON中value数组的第二个元素是转义后的JSON格式字符串，而非原生JSON对象。

你尝试的PHP数组无法得到正确结果，原代码结构错误：

array(
    "value" => "01GQSE92030S8MNA78WQZ09JJQ",
    array(
        "user_id" => "{{current_user.id}}",
        "user_phone" => "{{current_user.phone}}",
        "ticket_id" => "{{ticket.id}}",
        "ticket_comment" => "{{ticket.latest_comment}}",
        "ticket_comment_author" => "{{ticket.latest_comment.author.name}}",
        "organization_id" => "{{ticket.organization.external_id}}",
        "organization_name" => "{{ticket.organization.name}}",
        "requester_name" => "{{ticket.requester.name}}",
        "requester_phone" => "{{ticket.requester.phone}}",
        "agent_external_id" => "{{current_user.external_id}}",
        "ticket_external_id" => "{{ticket.external_id}}",
        "customer_external_id" => "{{ticket.requester.external_id}}"
    )
);

要生成目标格式，需注意两个核心点：

1. value必须是包含两个元素的数组
2. 第二个元素需是JSON字符串（先把内部键值对转为JSON，再作为字符串存入数组）

正确的PHP代码如下：

// 定义内部需要的键值对数组（仅保留目标JSON要求的字段）
$innerData = [
    "user_id" => "{{current_user.id}}",
    "user_phone" => "{{current_user.phone}}",
    "ticket_id" => "{{ticket.id}}",
    "ticket_comment" => "{{ticket.latest_comment}}",
    "ticket_comment_author" => "{{ticket.latest_comment.author.name}}",
    "organization_id" => "{{ticket.organization.external_id}}",
    "organization_name" => "{{ticket.organization.name}}",
    "requester_name" => "{{ticket.requester.name}}",
    "requester_phone" => "{{ticket.requester.phone}}"
];

// 将内部数组转为JSON字符串（自动处理引号转义）
$innerJsonStr = json_encode($innerData);

// 构建最终数组结构
$finalArray = [
    "value" => [
        "01GQSE92030S8MNA78WQZ09JJQ",
        $innerJsonStr
    ]
];

// 生成格式化的最终JSON
$finalJson = json_encode($finalArray, JSON_PRETTY_PRINT);

// 输出结果
echo $finalJson;

• 先创建内部键值对数组，剔除你原代码中多余的3个字段，匹配目标JSON的内容
• 用json_encode($innerData)将数组转为JSON字符串，自动完成引号转义，符合目标格式要求
• 最终数组的value字段是包含两个元素的数组：第一个是ID字符串，第二个是生成的JSON字符串
• 加上JSON_PRETTY_PRINT参数可以生成和目标一致的格式化JSON

内容的提问来源于stack exchange，提问作者Megamind