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Zend Framework: Zend_Filter_StringToCapitalize Component Proposal

Proposed Component Name Zend_Filter_StringToCapitalize
Developer Notes
Proposers Thomas Weidner
Zend Liaison TBD
Revision 1.0 - 12 April 2010: Initial Draft. (wiki revision: 3)

Table of Contents

1. Overview

Zend_Filter_StringToCapitalize is a simple string filter which lowercases the string and capitalizes each word.

2. References

3. Component Requirements, Constraints, and Acceptance Criteria

  • This component will capitalize strings by lowercasing them and uppercasing the first character of each word
  • This component will only work on strings

4. Dependencies on Other Framework Components

  • Zend_Filter

5. Theory of Operation

The component is a string filter and can be used like all other filters.

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_StringToCapitalize

8. Use Cases


Default usage

INPUT : "my input"
OUTPUT: "My Input"



INPUT : "my ärger"
OUTPUT: "My Ärger"


Only first word

INPUT : "my ärger"
OUTPUT: "My ärger"

9. Class Skeletons



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  1. Apr 12, 2010

    <p>One thing to mention:<br />
    Do we want to have the several casing variants diverted into seperate filters, or is it convinient to have one filter for all variants.</p>

    <p>get my content - lower (already done by StringToLower)<br />
    GET MY CONTENT - upper (already done by StringToUpper)<br />
    Get My Content - word<br />
    Get my content - first</p>

    1. Jul 28, 2010

      <p>I'd personally prefer to have this in one filter.</p>

      <p>Also, why can't this class accept arrays as well?</p>

      1. Jul 30, 2010

        <p>All string filters should behave the same way.<br />
        It would be no good if this single string filter behaves different than all other string filters.</p>

        <p>When there is a good usecase for string filters to support arrays in addition to strings then all filters should support it.</p>

  2. Apr 13, 2010

    <p>In 2. it's <a href="">mb_convert_case</a> instead of mb_case_convert.</p>

  3. Aug 03, 2010

    <ac:macro ac:name="note"><ac:rich-text-body><p><strong>Community Review Team Recommendation</strong></p>

    <p>The CR Team advises that this proposal be approved, and suggests this component then also implements the (de)capitalization of entire strings, preparing for a possible removing of StringToUpper and StringToLower in ZF2. Also we suggest to reconsider the name, e.g. Zend_Filter_StringCase.</p></ac:rich-text-body></ac:macro>

    1. Aug 03, 2010

      <p>Note:<br />
      I was said from my Zend liaison that functionallity has to be divided into several proposals.<br />
      This would also be true for ToLower/ToUpper. I have no problem to concate them into a single filter when it's really wished to do so.</p>

      <p>Note2:<br />
      For ZF 2.0 it would be better to move all explicit "string" Filters to the namespace<br />
      "Zend_Filter_String_"... therefor my proposed name would be "Zend_Filter_String_Case"</p>

      1. Aug 12, 2010

        <p>While your liaison may have recommended this in the past, the CR Team has a good argument, and my team and I agree with what they recommend. It will mean a little overlap of functionality in ZF1, but the StringToUpper and StringToLower filters can then be removed in ZF2.</p>

        <p>As for reorganization of the filter namespace, that debate has moved to the zf-contributors mailing list.</p>