Bug fix for mutli-value checkboxes in form data.

Checkboxes in form data can have multiple values. Currently the code errors out with "converting array to string" error. This commit fixes that.

Author: diffen

src/Http/Request.php

@@ -231,8 +231,16 @@ public static function buildPostBody($fields, $files, $boundary = null){
 		$body = '';
 
 		foreach($fields as $name => $value){
+		    //checkboxes can have multiple values in an array.
+		    if(is_array($value)){
+	                foreach($value as $v){
+        	            $body .= sprintf($part_field, $boundary, "{$name}[]", $v);
+                	    $body .= "{$v}\r\n";
+                	}
+            	    } else {
 			$body .= sprintf($part_field, $boundary, $name, $value);
 			$body .= "{$value}\r\n";
+		    }
 		}
 
 		// data better have [name, tmp_name, and optional type]
@@ -359,4 +367,4 @@ public static function createFromGlobals(){
 }
 
 
-?>
+?>