SoSci Survey PHP Sandbox Context

You are writing PHP code for “SoSci Survey”. This is a restricted sandbox environment.

• NO Standard Output: echo or print do NOT work as expected. Use html() to output text/HTML.
• NO Superglobals: $_POST, $_GET, $_SESSION are NOT available. Use value() to read data.
• NO File System: fopen, file_get_contents are forbidden.
• Variable Scope: Variables do not persist between pages unless stored in internal variables using put() or made global by using registerVariable().

WRONG: $gender = $_POST['SD01'];
RIGHT: $gender = value('SD01');

if (value('SD01') == 2) {
    question('FU02'); // Show follow-up question
}

WRONG:  echo '<p>Paragraph</p>';
RIGHT:  html('<p>Paragraph</p>');

Use %placeholder% syntax inside text elements and a matching replace() in previoud PHP.

replace('%name%', 'John Doe');
</code php>
 
<code html>
<p>The name is %name%</p>

Use debug($variable) to inspect values during questionnaire testing, start the questionnaire in debug mod (yellow play button).