[[Use Selected Items in Another Question]]
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en:create:filter-items [02.12.2014 10:39] – alexander.ritteren:create:filter-items [26.01.2015 07:11] – alexander.ritter
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 The objective now is that the second question only shows the media (items) for selection that were given at least a score of 2 in the first question. The objective now is that the second question only shows the media (items) for selection that were given at least a score of 2 in the first question.
  
-==== Abstract ====+ 
 +==== Solution in a Nutshell ====
  
 The function ''[[:en:create:functions:getitems|getItems()]]'' provides you with a list of items used at least (min) once a month (value of 2). You can transfer this list with the function [[:en:create:functions:question|question()]] -- but of course only if it contains at least one element. The function ''[[:en:create:functions:getitems|getItems()]]'' provides you with a list of items used at least (min) once a month (value of 2). You can transfer this list with the function [[:en:create:functions:question|question()]] -- but of course only if it contains at least one element.
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 </code> </code>
  
-The rest of the manual describes how you work with arrays in detail. This is particularly interesting if ''getItems()'' does not help.  +The rest of the manual describes how you work with arrays in detail. This is particularly interesting if ''getItems()'' does not help.  
 + 
  
 ==== The Long Way ==== ==== The Long Way ====
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 for ($i=1; $i<=$number_items; $i++) { // enumerate from 1 to 6 for ($i=1; $i<=$number_items; $i++) { // enumerate from 1 to 6
-  $ID = $question.'_'.$i; // gives e.g. TF_04_1+  $id = $question.'_'.$i; // gives e.g. TF_04_1
   // Does the item have a score of at least 2?   // Does the item have a score of at least 2?
-  if (value($ID) >= 2) {+  if (value($id) >= 2) {
     $itemlist[] = $i;     $itemlist[] = $i;
   }   }
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 for ($i=1; $i<=$number_items; $i++) { for ($i=1; $i<=$number_items; $i++) {
-  $ID = $question.'_'.$i; // gives e.g. TF_04_1 +  $id = $question.'_'.$i; // gives e.g. TF_04_1 
-  if (value($ID) >= 2) {+  if (value($id) >= 2) {
     $itemlist[] = $i;     $itemlist[] = $i;
   }   }
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 <code php> <code php>
-// first of all, the three questions are asked on page 1 +// First of all, the three questions are asked on page 1 
 question('NU01'); // Do you use web blogs? (1=no, 2=yes) question('NU01'); // Do you use web blogs? (1=no, 2=yes)
 question('NU02'); // Do you use podcasts? (1=no, 2=yes) question('NU02'); // Do you use podcasts? (1=no, 2=yes)
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 <code php> <code php>
-// an item list is created and queried on page 2+// An item list is created and queried on page 2
 $items = array(1,2,3); // items 1-3 are always asked $items = array(1,2,3); // items 1-3 are always asked
 if (value('NU01') == 2) { if (value('NU01') == 2) {
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   $items[] = 6; // wikis used at least rarely => item 6   $items[] = 6; // wikis used at least rarely => item 6
 } }
-// finally, ask the question+// Finally, ask the question
 question('TF13', $items); question('TF13', $items);
 </code> </code>
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 <code php> <code php>
-// determine additional items+// Determine additional items
 $items1 = getItems('TF04', 'all'); // list all items in question 1 $items1 = getItems('TF04', 'all'); // list all items in question 1
 $items2 = getItems('TF05', 'all'); // list all items in question 2  $items2 = getItems('TF05', 'all'); // list all items in question 2 
en/create/filter-items.txt · Last modified: 19.05.2021 21:17 by sophia.schauer
 
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