WordPress Interview Questions and Answers.

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Why “WP to Twitter” plugin fail to submit an update to Twitter in WordPress?
When creating your application, do not click the “create your access token” until you first click on Settings and change the Application Type to “Read, Write and Access direct messages”.
After your Twitter application has been updated to “Read, Write and Access direct messages”, click on the Home tab, and “create your access token”.

1 What is WordPress?

The WordPress web site defines WordPress as “web software you can use to create a beautiful website or blog. “ That describes it in the simplest form possible though I will try to expand on that. WordPress is the platform that we currently use for the majority of all client web sites. It was originally used for blogs but has since expanded to be used for full web sites, both personal and business. The main reason people prefer…

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PHP Shorthand If/Else Using Ternary Operators (?:)

n essential part of programming is evaluating conditions using if/else and switch/case statements. If / Else statements are easy to code and global to all languages. If / Else statements are great but they can be too long.

I preach a lot about using shorthand CSS and using MooTools to make JavaScript relatively shorthand, so I look towards PHP to do the same. If/Else statements aren’t optimal (or necessary) in all situations. Enter ternary operators.

Ternary operator logic is the process of using “(condition) ? (true return value) : (false return value)” statements to shorten your if/else structures.

What Does Ternary Logic Look Like?

/* most basic usage */
$var = 5;
$var_is_greater_than_two = ($var > 2 ? true : false); // returns true

What Are The Advantages of Ternary Logic?

There are some valuable advantages to using this type of logic:

  • Makes coding simple if/else logic quicker
  • You can do your if/else logic inline with output instead of breaking your output building for if/else statements
  • Makes code shorter
  • Makes maintaining code quicker, easier
  • Job security?

Tips for Using Ternary Operators

Here are a few tips for when using “?:” logic:

  • Don’t go more levels deep than what you feel comfortable with maintaining.
  • If you work in a team setting, make sure the other programmers understand the code.
  • PHP.net recommends avoiding stacking ternary operators. “Is [sic] is recommended that you avoid “stacking” ternary expressions. PHP’s behaviour when using more than one ternary operator within a single statement is non-obvious.”
  • If you aren’t experienced with using ternary operators, write your code using if/else first, then translate the code into ?’s and :’s.
  • Use enough parenthesis to keep your code organized, but so many that you create “code soup.”

More Sample Usage

Here are a couple more uses of ternary operators, ranging from simple to advanced:

/* another basic usage */

$message = 'Hello '.($user->is_logged_in() ? $user->get('first_name') : 'Guest');
/* echo, inline */

echo 'Based on your score, you are a ',($score > 10 ? 'genius' : 'nobody'); //harsh!
/* a bit tougher */
$score = 10;
$age = 20;
echo 'Taking into account your age and score, you are: ',($age > 10 ? ($score < 80 ? 'behind' : 'above average') : ($score < 50 ? 'behind' : 'above average')); // returns 'You are behind'
/* "thankfully-you-don't-need-to-maintain-this" level */
 $days = ($month == 2 ? ($year % 4 ? 28 : ($year % 100 ? 29 : ($year %400 ? 28 : 29))) : (($month - 1) % 7 % 2 ? 30 : 31)); //returns days in the given month