Curl To Php - Complete Guide

cURL to PHP converter transforms cURL commands into equivalent PHP code using the cURL extension or Guzzle HTTP client. Essential for developers integrating APIs, converting tested cURL commands into production PHP code.

How It Works

Parse cURL command to extract: method, URL, headers, data, auth, cookies, and options. Map each to PHP cURL functions (curl_setopt) or Guzzle configuration. Generate properly formatted PHP code with error handling.

Technical Details

PHP cURL extension wraps libcurl. Key functions: curl_init(), curl_setopt(), curl_exec(), curl_close(). Options: CURLOPT_URL, CURLOPT_POST, CURLOPT_HTTPHEADER, CURLOPT_POSTFIELDS. Guzzle provides higher-level abstraction with PSR-7 support.

Common Use Cases

1. API Integration: Convert tested API calls to PHP code.
   • Example: curl -X POST with JSON → PHP
2. Migration: Move shell scripts to PHP applications.
3. Learning: Understand PHP cURL from familiar curl syntax.
4. Documentation: Generate PHP examples from curl commands.

Code Examples

cURL Command to PHP

// Original: curl -X POST https://api.example.com/users \
//   -H "Content-Type: application/json" \
//   -H "Authorization: Bearer token123" \
//   -d '{"name":"John","email":"john@example.com"}'

// PHP cURL equivalent
$ch = curl_init();

curl_setopt_array($ch, [
    CURLOPT_URL => 'https://api.example.com/users',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => json_encode([
        'name' => 'John',
        'email' => 'john@example.com'
    ]),
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/json',
        'Authorization: Bearer token123'
    ],
]);

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

if (curl_errno($ch)) {
    throw new Exception('cURL Error: ' . curl_error($ch));
}

curl_close($ch);

$data = json_decode($response, true);

// Guzzle equivalent
use GuzzleHttp\Client;

$client = new Client();
$response = $client->post('https://api.example.com/users', [
    'headers' => [
        'Authorization' => 'Bearer token123'
    ],
    'json' => [
        'name' => 'John',
        'email' => 'john@example.com'
    ]
]);

$data = json_decode($response->getBody(), true);

Both cURL extension and Guzzle approaches. Guzzle handles JSON encoding automatically with json option.

Tips & Best Practices

• Always set CURLOPT_RETURNTRANSFER for response capture
• Check curl_errno() for connection errors
• Use json_encode/decode for JSON APIs
• Keep SSL verification enabled in production
• Consider Guzzle for complex applications

Common Mistakes to Avoid

• Forgetting CURLOPT_RETURNTRANSFER
• Not closing curl handle (curl_close)
• Disabling SSL verification in production
• Not checking for cURL errors
• Wrong content type for data format

When to Use This Tool

Use cURL to PHP converter when integrating APIs in PHP, converting tested curl commands to code, or learning PHP HTTP requests.

Frequently Asked Questions

Should I use PHP cURL or Guzzle?

cURL is built-in, zero dependencies. Guzzle is modern, PSR-7 compliant, better for complex apps. For simple requests, cURL. For production apps with many API calls, Guzzle.

How do I handle JSON responses?

Use json_decode($response, true) for array, json_decode($response) for object. Check json_last_error() for parse errors. Set Accept: application/json header.

What about authentication?

Basic auth: CURLOPT_USERPWD = "user:pass". Bearer token: header "Authorization: Bearer token". OAuth needs additional libraries.

How do I handle SSL errors?

CURLOPT_SSL_VERIFYPEER and CURLOPT_SSL_VERIFYHOST should be true in production. Only disable for testing. Ensure CA certificates are installed.

Get Started

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Last updated: June 27, 2026