Is it necessary to use both isset() and empty() functions to check if a field is empty in a PHP form submission?

It is not necessary to use both isset() and empty() functions to check if a field is empty in a PHP form submission. The empty() function already checks if a variable is set and not empty, so using isset() in addition is redundant. You can simply use the empty() function to check if a field is empty in a PHP form submission. 

if (!empty($_POST['field_name'])) {
    // Field is not empty, do something with the data
} else {
    // Field is empty, display an error message
}

Keywords

isset empty PHP form submission field validation

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