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我正在嘗試為網(wǎng)站創(chuàng)建一個(gè)管理面板（CRUD 操作）。我首先創(chuàng)建 API 端點(diǎn)，然后將其托管在我的子域上。我現(xiàn)在正在從該端點(diǎn)獲取數(shù)據(jù)。顯示所有聯(lián)系人 (GET)、單個(gè)聯(lián)系人 (GET) 和添加新聯(lián)系人 (POST) 效果很好，但我在更新聯(lián)系人 (PUT) 方面卡住了好幾天。

預(yù)填表格工作正常。當(dāng)我提交數(shù)據(jù)時(shí)，出現(xiàn)以下錯(cuò)誤：

Access to XMLHttpRequest at 'https://api.itisgoodtohave.me/contacts/update.php' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

PUT https://api.itisgoodtohave.me/contacts/update.php net::ERR_FAILED

Uncaught (in promise) AxiosError?{message: 'Network Error', name: 'AxiosError', code: 'ERR_NETWORK', config: {…}, request: XMLHttpRequest,?…}

update.php:

<?php

    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Headers: *");
    header("Access-Control-Allow-Methods: *");

    include 'DbConnection.php';

    $objDb = new DbConnection;
    $conn = $objDb->connect();

    $method = $_SERVER['REQUEST_METHOD'];

    if ($method = "POST") {
        $contact = json_decode(file_get_contents('php://input'));
        $sql = "UPDATE contacts SET name=:name, email=:email, phone=:phone WHERE id=:id";
        $stmt = $conn->prepare($sql);
        $stmt->bindParam(':id', $contact->id);
        $stmt->bindParam(':name', $contact->name);
        $stmt->bindParam(':email', $contact->email);
        $stmt->bindParam(':phone', $contact->phone);
        if ($stmt->execute()) {
            $response = ['status' => 1, 'message' => "Contact updated sucessfully."];
        } else {
            $response = ['status' => 0, 'message' => "Could not update contact."];
        }
        echo json_encode($response);
    } else {
        echo "some error occured";
    }

EditContact.js

import React from 'react';
import axios from 'axios'; 
import { useState, useEffect } from 'react';
import { useNavigate, useParams } from 'react-router-dom';

export default function EditContact() {
  const [inputs, setInputs] = useState([])
  const navigate = useNavigate();
  const { id } = useParams();
  

 useEffect(() => {
    showContact();
 }, [])

function showContact() {
    axios.get(`https://api.mywebsite.com/contacts/single_read.php/?id=${id}`)  
    .then(function(response) {
        setInputs(response.data);
    })
}

    const handleChange = (event) => {
        const name = event.target.name;
        const value = event.target.value;
        setInputs(values=> ({...values, [name]: value}));
        console.log(inputs)
    }

    const handleSubmit = (event) => {
        event.preventDefault();
        axios.put('https://api.mywebsite.com/contacts/update.php', inputs)
        .then(function(response){
            console.log(response)
            navigate('/admin/contacts')
        })
    }


  return (
    <div>
      <h3>Edit Contact</h3>
      <form onSubmit={handleSubmit}>
            
            <label>Name</label>
            <input defaultValue={inputs.name} type="text" name="name" onChange={handleChange} />
            <br />

            <label>Email</label>
            <input defaultValue={inputs.email} type="text" name="email"  onChange={handleChange} />
            <br />

            <label>Phone</label>
            <input defaultValue={inputs.phone} type="text" name="phone" onChange={handleChange} />
            <br />

            <button type="submit">Save</button>

        </form>     

    </div>
  )
}

我已經(jīng)嘗試了郵遞員中的每個(gè)端點(diǎn)。所有這些（GET、POST、PUT、DELETE）都在工作。這些條目已在我的數(shù)據(jù)庫(kù)中更新。

經(jīng)過(guò)幾個(gè)小時(shí)的 CORS 谷歌搜索、再次重寫我的代碼等之后，我就是無(wú)法理解。我對(duì)編碼還很陌生，但對(duì)我來(lái)說(shuō)，POST 有效但 PUT 無(wú)效似乎不合邏輯（或者我在這里缺少一些基本邏輯）。

如果有人能提出新想法，我會(huì)很高興。我渴望學(xué)習(xí):)