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--- en:create:checks [15.01.2015 20:08] – [Probing] alexander.ritter
+++ en:create:checks [23.11.2020 15:35] (current) – [Example: All Items or None at All] sophia.schauer
@@ Line 66: / Line 66: @@
 ===== Customized Response Check =====
-If the predefined checks are insufficient, you can program a customized response check using a filter and the [[:en:create:functions:repeatpage|repeatPage()]] function.
+If the predefined checks are insufficient, you can program a customized response check using a [[en:create:php-filters|PHP-filter]] and the [[:en:create:functions:repeatpage|repeatPage()]] function.
-The PHP code used to check the answer must be put on the page __after__ the question at the top. Therefore, if the question that needs to be checked is on page 2 then the PHP code that checks the question must be put at the top on page 3.
+A detailed explanation and examples can be found in the [[:en:create:checks-php]] manual.
-**Tip:** Further details about programming filters can be found under [[:en:create:filters|Filter Questions and Filters]].
-**Tip:** Use the function ''[[:en:create:functions:markfail|markFail()]]'' to highlight inputs with incorrect responses.
-You will receive an error message when you display a text element using [[:en:create:functions:text|text()]] when answers are missing/incorrect. When you set up the text element make sure the text is displayed in the style of a //warning// -- then it will have the same format as the standard error messages.
-==== Example: All Items or None at All ====
-The following PHP code checks whether all items in a scale were answered -- or none at all. The question's ID (in example ''AB01'') must therefore be changed to reflect the actual question ID and the error message must be saved as a text element. If this text element's ID is not "error_AB01" then the ID must also be customized.
-<code php>
-// Create a list of all items in the question
-$items = getItems('AB01');
-// Determine items answered
-$answered = getItems('AB01', '>', 0);
-// Error and go back if not all or none were answered
-if ((count($answered) > 0) and (count($answered) < count($items))) {
-  text('error_AB01');
-  repeatPage();
-}
-</code>