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--- en:create:checks-php [22.07.2019 16:36] – created johannes.jungilligens
+++ en:create:checks-php [13.05.2022 19:14] (current) – saskia.mueller.577
@@ Line 15: / Line 15: @@
 You can display an error message if you enter the ID of a text module as an argument in the ''repeatPage()'' function (see below). Alternatively, you can also display a corresponding text block using [[:en:create:functions:text|text()]]. For the second variant, when creating the text module, select that the text is displayed in the style of a //warning// -- then it receives the same formatting as the standard error messages.
+Below are some sample applications for individual response checks including the required PHP code.
-===== Example: Multiple Selection Matrix =======
+===== Multiple Selection Matrix =======
 In an ordinary scale you can easily check whether the participant has selected an option in each line. But if you use a [[:en:create:combine|combined question]], which allows the participant several crosses per line (multiple choice matrix), then you need some PHP code to check if really something was selected in each line.
@@ Line 84: / Line 85: @@
-===== Example: All Items or None at All ======
+===== All Items or None at All ======
 The following PHP code checks whether all items on a scale were answered -- or none at all. The question identifier (in this example ''AB01'') must be changed according to the actual question identifier, the error message must be saved as a text module. If the identifier of this text module is not "error_AB01", this identifier must also be changed.
@@ Line 99: / Line 100: @@
 </code>
+===== Consistency check text input =====
+Open text inputs can be set to accept numbers only ([[:en:create:checks#input_of_numbers|Check_responses: entering_numbers]]). The following is to check whether consistent values were entered in three input fields.
+  * TX01_01 -- Number of people in the company
+  * TY02_01 -- Number of managers in the company
+  * TY02_02 -- Number of employees who are close to retirement
+It should now be ensured that the values for TY02_01 and TY02_02 are not higher than the total number of employees (TX01_01). If they are, the text with identifier TX02 should be displayed as an error message.
+The values retrieved by ''value()'' can be easily compared using the less-than (''<'') or greater-than (''>'') operator. The logical OR (''||'') checks if at least one of the two conditions is violated.
+<code php>
+if (
+  (value('TY02_01') > value('TX01_01')) ||
+  (value('TY02_02') > value('TX01_01'))
+) {
+  repeatPage('TX02');
+}
+</code>