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Zend Framework: Zend_Filter_StringPad Component Proposal

Table of Contents

1. Overview

Zend_Filter_StringPad is a filter which allows to extend strings to a specific length.

2. References

• PHP's str_pad

3. Component Requirements, Constraints, and Acceptance Criteria

• This component will correctly handle multi byte strings.
• This component will support the same parameters as PHP's own str_pad method.

4. Dependencies on Other Framework Components

none

5. Theory of Operation

This filter extends given strings to the wished length. It accepts and other string for padding and default to whitespace if non is given.
It also supports padding from left, right or both sides.
For simplicity this component adds also a view helper which makes use of this filter.

6. Milestones / Tasks

• Milestone 1: [DONE] Proposal finished
• Milestone 2: Proposal accepted
• Milestone 3: Working implementation
• Milestone 4: Unit tests
• Milestone 5: Documentation
• Milestone 6: Moved to core

7. Class Index

• Zend_Filter_StringPad
• Zend_View_Helper_StringPad

8. Use Cases

Pad a string to 15 chars

Pad a string to 15 chars, using another pad char

Pad a string to 15 chars, using another pad char and another direction

9. Class Skeletons