What are the potential pitfalls of using isset() to check form submissions in PHP?

Using isset() to check form submissions in PHP can lead to potential pitfalls because it only checks if a variable is set and not empty. This means that isset() may return true even if the form field is submitted with an empty value. To accurately check if a form field is submitted and not empty, you should use empty() instead. 

if(isset($_POST['submit']) && !empty($_POST['form_field'])){
    // Form submission logic here
}

Keywords

isset form submissions PHP validation error handling

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