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Showing results for tags 'conditionals'.
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Hello! Please explain to me how gender validations from scripts 2.3 differ from the nested one in script 2.4. I have this in 2.3 (updated with NULL coalescing operator while practicing Pursue section): $gender = $_REQUEST['gender'] ?? NULL; if ($gender == 'M') { $greeting = '<p><strong>Good day, Sir!</strong></p>'; } elseif ($gender == 'F') { $greeting == '<p><strong>Good day, Madam!</strong></p>'; } else { $gender = NULL; echo '<p class="error">Gender must be either "M" or "F"!< -
Placing this in 4th Edition as that's the book I'm working through. I've created a form with three inputs (Agent, Guest, Email) but Agent is not required. I'm trying to display different messages whether Agent is input or not but cannot get that part to work. I know the reset button doesn't work but that's just as the form was copied from an old html page. I'll get into field content validation once I can get past this stage as I have multiple fields to add but need to display different messages on form submission dependent on which fields get completed. <!DOCTYPE HTML> <html&g -
The Switch Conditional exercise on pages 143 - 150 makes us of an undefined variable, var cost; and I'm not sure what role it plays in the code. Do the cost elements in the switch statements load the value into the undefined variable var cost depending upon which condition is met in the document's type value? I can remove these two lines of code, as well as the undefined variable, var cost, and still see the membership form run: var type = document.getElementById('type'); var years = document.getElementById('years'); Why did we create a reference to the document element years w