You need to prevent form submission in your PHP script if a required field is left empty. How would you do this?

  • Use JavaScript to validate the form before submitting it
  • Check if the field is empty using the empty() function and display an error message if it is
  • Implement client-side validation using HTML5 required attribute
  • Use CSS to visually indicate the required fields and prompt the user to fill them
To prevent form submission in PHP when a required field is left empty, you can check if the field is empty using the empty() function. If the field is empty, you can display an error message to the user. This ensures that the form is not submitted until all required fields are filled. For further information on form validation in PHP, refer to: php.net/manual/en/tutorial.forms.php#tutorial.forms.validation
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