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🗣 Wd提问: php curl

🤖 Ai回答:
PHP cURL is a powerful tool for making HTTP requests in PHP、It allows you to interact with web services, APIs, and other remote servers using various protocols (HTTP, HTTPS, FTP, etc.)、Here's a comprehensive guide on how to use `cURL` in PHP.

🔧 Basic Example: GET Request

php
<?php
// Initialize cURL session
$ch = curl_init();

// Set the URL
curl_setopt($ch, CURLOPT_URL, 'https://api.65.hk/data');

// Return response instead of outputting it
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Execute the request
$response = curl_exec($ch);

// Check for errors
if (curl_errno($ch)) {
echo 'Error:' 、curl_error($ch);
}

// Close cURL session
curl_close($ch);

// Output the result
echo $response;
?

📥 POST Request with Data

php
<?php
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.65.hk/login');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
'username' = 'user',
'password' = 'pass'
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if (curl_errno($ch)) {
echo 'Error:' 、curl_error($ch);
}

curl_close($ch);
echo $response;
?

🌐 Send JSON Data

php
<?php
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.65.hk/users');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
'name' = 'John Doe',
'email' = 'john@65.hk'
]));
curl_setopt($ch, CURLOPT_HTTPHEADERS, [
'Content-Type: application/json'
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if (curl_errno($ch)) {
echo 'Error:' 、curl_error($ch);
}

curl_close($ch);
echo $response;
?

🔐 SSL / HTTPS with Verification

php
<?php
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.65.hk/secure');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true); // Verify SSL certificate
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

$response = curl_exec($ch);

if (curl_errno($ch)) {
echo 'Error:' 、curl_error($ch);
}

curl_close($ch);
?

🔄 Handle Headers & Status Code

php
<?php
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.65.hk/data');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true); // Include headers in response

$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// Split headers and body
$headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $headerSize);
$body = substr($response, $headerSize);

curl_close($ch);

echo Status Code: 、$httpCode 、\n;
echo Headers:\n 、$headers 、\n;
echo Body:\n 、$body;
?

✅ Useful Options

| Option | Purpose |

| `CURLOPT_RETURNTRANSFER` | Return response as string |
| `CURLOPT_FOLLOWLOCATION` | Follow redirects |
| `CURLOPT_TIMEOUT` | Timeout in seconds |
| `CURLOPT_USERAGENT` | Set user agent |
| `CURLOPT_COOKIE` | Send cookies |
| `CURLOPT_HTTPAUTH` | Enable HTTP authentication |
| `CURLOPT_USERPWD` | Username and password for auth |

Example:

php
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');

💡 Best Practices

Always check for errors using `curl_errno()` and `curl_error()`.
Use `curl_close()` to free up resources.
Avoid hardcoded URLs; use constants or config files.
Sanitize input data before sending.
Consider using `Guzzle` (a modern PHP HTTP client) for complex apps.

🚀 Alternative: Using Guzzle (Recommended for Complex Apps)

bash
composer require guzzlehttp/guzzle

php
<?php
use GuzzleHttp\Client;

$client = new Client();
$response = $client-post('https://api.65.hk/login', [
'json' = ['username' = 'user', 'password' = 'pass']
]);

echo $response-getBody();
?

Let me know if you need help with:
Authentication (Basic, OAuth)
File uploads
Handling cookies
Proxy support
Custom headers

Happy coding! 😊

Ai作答

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