Home arrow PHP arrow Page 5 - JV’s Power Tips for PHP (2)
PHP

JV’s Power Tips for PHP (2)


In this article Justin explores day to day programming techniques that can help to make a PHP developers life just that little bit easier.

Author Info:
By: Justin Vincent
Rating: 4 stars4 stars4 stars4 stars4 stars / 3
February 02, 2003
TABLE OF CONTENTS:
  1. · JV’s Power Tips for PHP (2)
  2. · The Problem
  3. · Method 1
  4. · Method 2
  5. · Method 3
  6. · Method 4
  7. · Conclusion

print this article
SEARCH DEVARTICLES

JV’s Power Tips for PHP (2) - Method 3
(Page 5 of 7 )

Here it is:

<?php

  $p = &$_POST;

  echo    ($p[‘bold’]?”<b>”:””)
    . ($p[‘italic’]?”<i>”:””)
    . ($p[‘underline’]?”<u>”:””)
    . ($p[‘strike’]?”<s>”:””)
    . $p[‘chat’]
    . ($p[‘strike’]?”</s>”:””)
    . ($p[‘underline’]?”</u>”:””)
. ($p[‘italic’]?”</i>”:””)
. ($p[‘bold’]?”</b>”:””);

?>


A bit more elegant? It certainly seems smaller than the previous two methods. Let’s have a detailed look at what’s going on:

Once again I used $p = &$_POST, so each time you see a $p you know it is the same as typing $_POST (but quicker).

Then the rest of the code is one long echo statement. Each part of the echo statement is a conditional statement wrapped up in () brackets. Let’s look at exactly how one of those statements works. For example:

($p[‘bold’]?”<b>”:””)

Firstly lets ignore the ()’s so that it becomes:

$p[‘bold’]?”<b>”:””

What is really happening is this:

test this -> $p[‘bold’] ? output this if true -> “<b>”: output this if false -> “”;

The ‘test this’ part follows the same rule as an if statement. In our case that will either be 1 (true) or nothing (false).

Then the entire thing is wrapped up in ()’s which ensures that the output is directed exactly where we want it and also helps with parsing accuracy.

This type of conditional statement can also be used on its own like so:

<?php

$your_thoughts = “i like it”;

$your_opinion = $your_thoughts == “i like it” ? “great” : “not so great”;

echo “This type of statement is $your_opinion.”;

// Output:
// This type of statement is great.

?>


Of course if it was me I would put () around it so that it looked like this:

$your_opinion = ($your_thoughts == “i like it” ? “great” : “not so great”);

I find that just makes this type of conditional operator easier to read and work with in general. Anyway, back to the third solution. If we look at it again it should now make perfect sense:

<?php

  $p = &$_POST;

  echo    ($p[‘bold’]?”<b>”:””)
    . ($p[‘italic’]?”<i>”:””)
    . ($p[‘underline’]?”<u>”:””)
    . ($p[‘strike’]?”<s>”:””)
    . $p[‘chat’]
    . ($p[‘strike’]?”</s>”:””)
    . ($p[‘underline’]?”</u>”:””)
. ($p[‘italic’]?”</i>”:””)
. ($p[‘bold’]?”</b>”:””);

?>


But is it the most elegant way of solving this problem? Not really. It suffers from the same problem that all of the above solutions do. I.E. What happens if I want to add new types of on/off formatting to this script? In all of the above solutions you would have to copy and paste redundant code. That is not very elegant. Furthermore, it would be far too easy to make a copy/paste mistake!

So let’s scrap all of the above and have another go at solving this problem.
blog comments powered by Disqus
PHP ARTICLES

- Removing Singletons in PHP
- Singletons in PHP
- Implement Facebook Javascript SDK with PHP
- Making Usage Statistics in PHP
- Installing PHP under Windows: Further Config...
- File Version Management in PHP
- Statistical View of Data in a Clustered Bar ...
- Creating a Multi-File Upload Script in PHP
- Executing Microsoft SQL Server Stored Proced...
- Code 10x More Efficiently Using Data Access ...
- A Few Tips for Speeding Up PHP Code
- The Modular Web Page
- Quick E-Commerce with PHP and PayPal
- Regression Testing With JMeter
- Building an Iterator with PHP

Watch our Tech Videos 
Dev Articles Forums 
 RSS  Articles
 RSS  Forums
 RSS  All Feeds
Write For Us 
Weekly Newsletter
 
Developer Updates  
Free Website Content 
Contact Us 
Site Map 
Privacy Policy 
Support 

Developer Shed Affiliates

 




© 2003-2017 by Developer Shed. All rights reserved. DS Cluster - Follow our Sitemap
Popular Web Development Topics
All Web Development Tutorials