I am using the WordPress Backup to Dropbox plugin, version 4.4.1. and have come across the “unexpected parameter ‘overwrite'”-issue as well. The WordPress-blog I am maintaining is running PHP 7 and I can confirm that that is indeed what is causing the issue. However, the problem doesn’t lie with the WP Backup to Dropbox plugin itself, but rather with code it relies on from benthedesigner and how that interacts with Curl. PHP 7 Removed support for disabling the CURLOPT_SAFE_UPLOAD option and CURLFile should be used to upload files instead.
The solution is to modify the /wp-content/plugins/wordpress-backup-to-dropbox/Dropbox/Dropbox/OAuth/Consumer/Curl.php file and make it PHP 7-aware. Below a patch that should do just that. Needles to say that the patch is provided without any warranty and that making a backup of the file before applying is recommended. Although, I can say that it works for my WordPress-blog.
--- Curl.php 2015-10-04 12:07:22.000000000 -0700
+++ Curl-patched.php 2016-02-06 09:40:11.000000000 -0800
@@ -66,7 +66,7 @@
$options = $this->defaultOptions;
$options[CURLOPT_CAINFO] = dirname(__FILE__) . '/ca-bundle.pem';
- if (version_compare(PHP_VERSION, '5.6') >= 0) {
+ if (version_compare(PHP_VERSION, '5.6') >= 0 && version_compare(PHP_VERSION, '7.0') < 0) {
$options[CURLOPT_SAFE_UPLOAD] = false;
}
@@ -78,7 +78,22 @@
$this->outFile = null;
} elseif ($method == 'POST') { // POST
$options[CURLOPT_POST] = true;
- $options[CURLOPT_POSTFIELDS] = $request['postfields'];
+ $postfields = $request['postfields'];
+ if (version_compare(PHP_VERSION, '7.0') >= 0) {
+ if (is_array($postfields) == true) {
+ foreach ($postfields as $k => $v) {
+ if (strpos($v, '@') === 0) {
+ $filename = ltrim($v, '@');
+ $semicolon = strpos($filename, ';');
+ if ($semicolon !== false) {
+ $filename = substr($filename, 0, $semicolon);
+ }
+ $postfields[$k] = new CURLFile($filename);
+ }
+ }
+ }
+ }
+ $options[CURLOPT_POSTFIELDS] = $postfields;
} elseif ($method == 'PUT' && $this->inFile) { // PUT
$options[CURLOPT_PUT] = true;
$options[CURLOPT_INFILE] = $this->inFile;
I did provide the plugin’s author with the patch on February 8…
