Handling PUT/DELETE arguments in PHP


Question

I am working on my REST client library for CodeIgniter and I am struggling to work out how to send PUT and DELETE arguments in PHP.

In a few places I have seen people using the options:

$this->option(CURLOPT_PUT, TRUE);
$this->option(CURLOPT_POSTFIELDS, $params);

Annoyingly, this seems to do nothing. Is this the correct way to set PUT parameters?

If so, how do I set DELETE parameters?

$this->option() is part of my library, it simply builds up an array of CURLOPT_XX constants and sends them to curl_setopt_array() when the built up cURL request is executed.

I am attempting to read PUT and DELETE parameters using the following code:

        case 'put':
            // Set up out PUT variables
            parse_str(file_get_contents('php://input'), $this->_put_args);
        break;

        case 'delete':
            // Set up out PUT variables
            parse_str(file_get_contents('php://input'), $this->_delete_args);
        break;

There are two options here, I am approaching this in the wrong way or there is a bug somewhere in my libraries. If you could let me know if this should theoretically work I can just hammer away on debug until I solve it.

I dont want to waste any more time on an approach that is fundamentally wrong.

1
83
11/1/2011 12:53:25 AM

Accepted Answer

Instead of using CURLOPT_PUT = TRUE use CURLOPT_CUSTOMREQUEST = 'PUT' and CURLOPT_CUSTOMREQUEST = 'DELETE' then just set values with CURLOPT_POSTFIELDS.

68
12/25/2012 4:25:47 AM

Here is some code which may be helpful for others wanting to handle PUT and DELETE params. You are able to set $_PUT and $_DELETE via $GLOBALS[], but they will not be directly accessible in functions unless declared global or accessed via $GLOBALS[]. To get around this, I've made a simple class for reading GET/POST/PUT/DELETE request arguments. This also populates $_REQUEST with PUT/DELETE params.

This class will parse the PUT/DELETE params and support GET/POST as well.

class Params {
  private $params = Array();

  public function __construct() {
    $this->_parseParams();
  }

  /**
    * @brief Lookup request params
    * @param string $name Name of the argument to lookup
    * @param mixed $default Default value to return if argument is missing
    * @returns The value from the GET/POST/PUT/DELETE value, or $default if not set
    */
  public function get($name, $default = null) {
    if (isset($this->params[$name])) {
      return $this->params[$name];
    } else {
      return $default;
    }
  }

  private function _parseParams() {
    $method = $_SERVER['REQUEST_METHOD'];
    if ($method == "PUT" || $method == "DELETE") {
        parse_str(file_get_contents('php://input'), $this->params);
        $GLOBALS["_{$method}"] = $this->params;
        // Add these request vars into _REQUEST, mimicing default behavior, PUT/DELETE will override existing COOKIE/GET vars
        $_REQUEST = $this->params + $_REQUEST;
    } else if ($method == "GET") {
        $this->params = $_GET;
    } else if ($method == "POST") {
        $this->params = $_POST;
    }
  }
}

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