PHP中使用curl POST多维JSON参数的编码问题求助

我不清楚如何正确编码以下多维JSON记录，以查询在线记录集合并通过POST请求发送，发送请求时遇到404错误，推测认证已成功，但搜索参数传递不正确。

目标JSON结构：

{
    "conditions" : [
    {
     "fullpath" : {
        "operator" : "starts_with",
        "value" : "/Destination Structure Test/2-Thinking Outside the Borders. Library Leadership in a World Community/"
        }
    },
    {
        "filename" : {
            "operator" : "eq",
            "value" : "ThinkingOutsideTheBorders.pdf"
        }
    }   
    ]
}

我的PHP实现尝试：

<?php

$apiUrl = 'https://the_url_I_am_using';

$bearerToken = 'wombats';

$ch = curl_init($apiUrl);

$data = array();
$data["conditions"] = array();
$conditions["fullpath"] = array();
$conditions["filename"] = array();

$fp = array();
$fp["operator"] = "starts_with";
$fp["value"] = "/Destination Structure Test/2-Thinking Outside the Borders/";
$conditions["fullpath"][] = $fp;

$fn = array();
$fn["operator"] = "eq";
$fn["value"] = "ThinkingOutsideTheBorders.pdf";
$conditions["filename"][] = $fn;

$data = http_build_query($data);
$payload = json_encode(array("user" => $data));

curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  // Return the response as a string
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Authorization: Bearer $bearerToken",  // Set the Authorization header
    "Content-Type: application/json",      // Specify that we are sending/receiving JSON
]);

$response = curl_exec($ch);

if(curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);  // If there's an error, print it
} else {
    // Print the response
    echo 'Response: ' . $response;
}

// Close the cURL session
curl_close($ch);

错误分析与修正方案 #

核心错误点：

1. 数组结构构建错误：目标JSON中conditions是一个数组，每个元素是独立的对象（分别包含fullpath或filename键），但你错误地将fullpath和filename作为同级键放在了一个数组里，结构完全不符。
2. 误用http_build_query：该函数用于生成URL编码的查询字符串，不适合构建JSON结构，且你后续将结果包裹在user键下，彻底偏离了目标格式。
3. Payload结构错误：目标JSON的顶级键是conditions，但你生成的Payload是{"user": ...}，API无法识别参数。

修正后的代码：

<?php

$apiUrl = 'https://the_url_I_am_using';
$bearerToken = 'wombats';

$ch = curl_init($apiUrl);

// 构建与目标JSON完全匹配的PHP数组
$data = [
    "conditions" => [
        [
            "fullpath" => [
                "operator" => "starts_with",
                "value" => "/Destination Structure Test/2-Thinking Outside the Borders. Library Leadership in a World Community/"
            ]
        ],
        [
            "filename" => [
                "operator" => "eq",
                "value" => "ThinkingOutsideTheBorders.pdf"
            ]
        ]
    ]
];

// 直接将数组编码为JSON作为Payload
$payload = json_encode($data);

curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Authorization: Bearer $bearerToken",
    "Content-Type: application/json",
]);

$response = curl_exec($ch);

if(curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
} else {
    echo 'Response: ' . $response;
}

curl_close($ch);

关键修正说明：

• 直接构建与目标JSON结构完全一致的PHP多维数组，确保层级和键名匹配。
• 移除http_build_query和多余的user包装，直接对正确的数组执行json_encode生成Payload。
• 保持请求头的Content-Type: application/json不变，确保API能正确解析JSON格式的参数。

内容的提问来源于stack exchange，提问作者Andrew Bullen