Question

I have this PHP loop:

foreach($_POST['af_break_date'] as $id=>$value) {
    $update_break_date_query = "UPDATE studentdates SET student_break_date = '$value' WHERE student_date_id = '$id';";
    $update_break_date_sql = mysql_query($update_break_date_query) or die(mysql_error());
}

I want to run the $update_break_date_sql only if each $_POST['af_break_date'] is not null.

How can this be done?

Answer 1

foreach($_POST['af_break_date'] as $id=>$value)
{
    if($value != '')
    {
        $update_break_date_query = "UPDATE studentdates SET student_break_date = '$value' WHERE student_date_id = '$id';";
        $update_break_date_sql = mysql_query($update_break_date_query) or die(mysql_error());
    }
 }

Don’t forget to secure for SQL Injection because you are adding raw user input to the query. Have a look at PDO or MySQLi and parameterised queries.