- Upload Suite Overview
- What's New?
- Choosing Upload Technology
- Evaluating Upload Suite
- Upload Suite Editions
- System Requirements
- Installation and Deployment Notes
- ActiveX/Java Uploader
- HTML5/Flash Uploader
- Before You Started with HTML5/Flash Uploader
- HTML5/Flash Uploader Architecture
- HTML5/Flash Uploader User Interface
- Getting Started
- Using HTML5/Flash Uploader
- Troubleshooting
- Reference
- HTML5/Flash Uploader ASP.NET Reference
- HTML5/Flash Uploader PHP Reference
- AddFilesProgressDialog Class HTML5/Flash Uploader PHP
- BaseClientControl Class HTML5/Flash Uploader PHP
- BaseControl Class HTML5/Flash Uploader PHP
- ClientEvents Class HTML5/Flash Uploader PHP
- ClientEvents Members HTML5/Flash Uploader PHP
- ClientEvents Properties HTML5/Flash Uploader PHP
- AfterPackageUpload Property HTML5/Flash Uploader PHP
- AfterUpload Property HTML5/Flash Uploader PHP
- BeforePackageUpload Property HTML5/Flash Uploader PHP
- BeforeSendRequest Property HTML5/Flash Uploader PHP
- BeforeUpload Property HTML5/Flash Uploader PHP
- Error Property HTML5/Flash Uploader PHP
- ImageEditorClose Property HTML5/Flash Uploader PHP
- InitComplete Property HTML5/Flash Uploader PHP
- PreRender Property HTML5/Flash Uploader PHP
- Progress Property HTML5/Flash Uploader PHP
- RestrictionFailed Property HTML5/Flash Uploader PHP
- SelectionChange Property HTML5/Flash Uploader PHP
- UploadFileCountChange Property HTML5/Flash Uploader PHP
- CommonDialog Class HTML5/Flash Uploader PHP
- ConvertedFile Class HTML5/Flash Uploader PHP
- Converter Class HTML5/Flash Uploader PHP
- DescriptionEditor Class HTML5/Flash Uploader PHP
- DrawTool Class HTML5/Flash Uploader PHP
- FlashControl Class HTML5/Flash Uploader PHP
- ImageEditor Class HTML5/Flash Uploader PHP
- ImagePreviewWindow Class HTML5/Flash Uploader PHP
- ImageUploaderFlash Class HTML5/Flash Uploader PHP
- Messages Class HTML5/Flash Uploader PHP
- Metadata Class HTML5/Flash Uploader PHP
- Package Class HTML5/Flash Uploader PHP
- PaneItem Class HTML5/Flash Uploader PHP
- PostFields Class HTML5/Flash Uploader PHP
- Restrictions Class HTML5/Flash Uploader PHP
- StatusPane Class HTML5/Flash Uploader PHP
- TopPane Class HTML5/Flash Uploader PHP
- UploadErrorDialog Class HTML5/Flash Uploader PHP
- UploadHandler Class HTML5/Flash Uploader PHP
- UploadPane Class HTML5/Flash Uploader PHP
- UploadSettings Class HTML5/Flash Uploader PHP
- UploadedFile Class HTML5/Flash Uploader PHP
- AmazonS3Extender Class HTML5/Flash Uploader PHP
- FileSettings Class HTML5/Flash Uploader PHP
- HTML5/Flash Uploader JavaScript Reference
- HTML5/Flash Uploader Client-Side Events Reference
- POST Field Reference
- Licensing Information
- Legal Notices
ClientEvents.BeforeUpload Property HTML5/Flash Uploader PHP
Supported technologies:

Gets or sets an array of BeforeUpload event handlers.
Syntax
PHP
Initialize
public function &getBeforeUpload() {
}
public function setBeforeUpload($value) {
}
Property Value
Type: array
The string containing the name of BeforeUpload event handler or an array of handler names.
Remarks
This event fires when the upload is about to be started.
Returns
A boolean value (true or false). If event handler returns false (or zero), the upload is cancelled.
Otherwise, upload begins immediately after the event handler finishes. This makes the event handler convenient for validating
additional data provided by user.