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--- en:create:functions:setpageorder [07.12.2017 17:28] – [PHP-Code] janinejulianerp
+++ en:create:functions:setpageorder [29.09.2020 17:49] – sophia.schauer
@@ Line 27: / Line 27: @@
 **Note:** Filters can be inserted within the page order by using ''goToPage()''. If the filter jumps to a page within the ongoing page order, the sequence will be resumed there. If the filter jumps to a page outside of the page order, the normal page order in the questionnaire will be resumed from this page onwards.
-===== Example 1 =====
+In the following the use of ''setPageOrder()'' in connection with a [[:en:create:randomization]] or [[:en:create:rotation]] is illustrated by several examples.
+===== Two possible processes =====
 The following scenario should be implemented using ''setPageOrder()''. There are two question blocks  in the questionnaire: one of which is comprised of 5 pages and the other one of 7 pages. In one half of the questionnaire, Block A should be shown first and then Block B, and in the other half of the questionnaire, Block B should be shown first and then Block A.
@@ Line 60: / Line 62: @@
-===== Example 2 =====
+===== Random sequence I =====
 The questionnaire contains 5 pages that shall be displayed in random order.
@@ Line 74: / Line 76: @@
 <code php>
 if (!isset($pages)) {
-  $pages = array('LA', 'GE');
+  $pages = array('PA', 'PB', 'PC', 'PD', 'PE');
   shuffle($pages);
-  $pages[] = 'EM';
+  $pages[] = 'PX';
   registerVariable($pages);
 }
@@ Line 97: / Line 99: @@
 </code>
+===== Random sequence II =====
+In this example there are 3 blocks (A, B, C) with 3 to 5 pages (A1, A2, A3, B1, ...). The order of the blocks should be shuffled randomly and additionally the pages should be shuffled within each block -- only the first one should always stay at the beginning.
+**Note:** See also the example under Rotation -> [[:en:create:rotation#rotation_and_mix_of_blocks|Rotation and Mixing of Blocks]].
+==== Preparation ====
+If the individual pages are to be rotated, each page requires its own [[:en: glossary#page_ID]]. For the example the pages were named as follows: A1, A2, A3, B1 to B5, C1 to C4, and after C4 follows page D1, where the rotation should continue.
+==== PHP-Code ====
+<code php>
+// First save the page labels as array
+$rotation = array(
+  'A' => array('A1','A2','A3'),
+  'B' => array('B1','B2','B3','B4','B5'),
+  'C' => array('C1','C2','C3','C4')
+);
+// Mix each block individually
+foreach ($rotation as $key => $pages) {
+  // Remove the first page from the array $pages
+  $first = array_shift($pages);
+  // Mix the rest
+  shuffle($pages);
+  // Put the two back together again
+  array_unshift($pages, $first);
+  // And save back to the $rotation array
+  $rotation[$key] = $pages;
+}
+// Now mix the order of the blocks randomly
+shuffle($rotation);
+// Now set the result as page sequence
+// Continue with page 'D1' afterwards
+setPageOrder($rotation, 'D1');
+</code>
-===== Example 3 =====
+===== Save sequence =====
 In the survey project there are five topical question blocks. To simplify matters, these are put in sections ''R1'' to ''R5'' (this is optional). The question blocks are comprised of a different number of questions.