8. Transforming Input Data with Filters
In this chapter, we will provide an overview of standard filters that can be used with your web forms. A filter is a class which takes some input data, processes it, and produces some output data. We will also show how to write a custom filter.
In general, you can even use filters outside forms to process an arbitrary data. For example, filters may be used in a controller action to transform the data passed as GET and/or POST variables to certain format.
ZF3 components covered in this chapter:
| Component | Description |
|---|---|
Zend\Filter |
Contains various filters classes. |
Zend\InputFilter |
Implements a container for filters/validators. |
- 8.1. About Filters
- 8.2. Standard Filters Overview
- 8.3. Instantiating a Filter
- 8.4. About Filter Plugin Manager
- 8.5. Filter's Behavior in Case of Incorrect Input Data
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8.6. Filter Usage Examples
- 8.6.1. Filters Casting Input Data to a Specified Type
- 8.6.2. Filters Performing Manipulations on a File Path
- 8.6.3. Filters Performing Compression and Encryption of Input Data
- 8.6.4. Filters Manipulating String Data
- 8.6.5. Organizing Filters in a Chain
- 8.6.6. Custom Filtering with the Callback Filter
- 8.7. Writing Your Own Filter
- 8.8. Summary