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WordPress How to Build a WordPress Plugin Building WordPress Widgets, and Shortcodes Adding Custom Styles to Plugin Front End

Henrik Hansen
Henrik Hansen
23,176 Points

A comment on testing for empty strings...

Instead of testing the value of your variable, object, array or others for the empty string value, you should use the php function empty($var), witch does not throw a notice or warning if the variable does not exist. The php function isset($var) can also be used, but it does not test the value at all, thus isset($var) will return true.

<?php 

// This will throw a Notice if the title property does not exist:
if ( $wptreehouse_profile->badges[$i]->courses[1]->title != '' ) {
  // do stuff if title is not empty
 }

//This will check if the property exists and if the value is empty or false:
if ( !empty( $wptreehouse_profile->badges[$i]->courses[1]->title ) {
  //do stuff if title exists and is not empty
}

//This is a longer way to do it:
if ( isset(  $wptreehouse_profile->badges[$i]->courses[1]->title ) &&
      $wptreehouse_profile->badges[$i]->courses[1]->title != '' ) {
  //do stuff if title exists and is not empty
}

 ?>

Even though all of these will give the same result, all types of notices and warnings should be avoided.

Henrik Hansen
Henrik Hansen
23,176 Points

Also, I think there should be a way to discuss courses/videos/parts of it without posting it as a question. Or did I just miss that function?

1 Answer

Sue Dough
Sue Dough
35,800 Points

I agree. I am personally not a fan of != '' .