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--- docs:browsers:posting_forms [2009/06/26 00:32] – billh
+++ docs:browsers:posting_forms [2009/11/03 10:17] (current) – billh
@@ Line 16: / Line 16: @@
 </form>
 </code>
+It is common to test for this to determine if a form was posted:
+<code php>
+if( $_POST ){
+  // do something
+}
+</code>
+However, if the only thing in your form was a file input and a submit button, then the post array may be empty.  You should test for the files array instead:
+<code php>
+if( $_FILES ){
+  // do something
+}
+</code>
+===== handling max file size during uploads =====
+It is advisable to handle file sizes during uploads.  The easiest way to do this is to find out how large the file can be for uploads from apache and/or a php info page.  Then you add this element to the form:<code>
+<input type="hidden" name="MAX_FILE_SIZE" value="10485760" />
+</code>
+Once the form is posted, you can check for errors like this:<code>
+if( $_POST ){
+	if( isset($_FILES['datafile']) ){
+		if( $_FILES['datafile']['error'] === UPLOAD_ERR_OK ){
+			// process the uploaded file
+		}else{
+			// there was an error
+		}
+	}
+}
+</code>
+You can run a switch/case block if you prefer, and handle each error code differently.  See this page for more information about the file upload error codes:
+  * http://www.php.net/manual/en/features.file-upload.errors.php
 ===== multi select as an array =====