Php - 表单验证 - 下拉菜单+评论框

Question

I have been working on a input form for students for the past couple of hours. I have done mostly all of it with 0 hicups but I come across one minor issue that I can't think of a work around for. I have a drop down menu and the validation for that is :

 }
        if(empty($why) === true) {
            $errors[] = 'Please make sure to select the proper reasoning for your vistit today!';
    }

the default variable is set to be empty or just value="" (empty)...

now the next thing I need to validate is that if the student chooses the option "Other" I need them to then insert at least 10 characters and max of 30 into a Comments box specifically made for the students who can not find the general reason for their visit to the financial aid office. This is what I have for this (it is not working btw) :

if(isset($why) === Other) {
        $errors[] = 'Please add a comment explaining why you are visiting the office.';
}

So all in all I need help writing a validation that if the student chooses other then he or she MUST then write a brief summary as to why he or she is visiting the office in the "comments box".

Any help would be lovely. Thank you.

Answer 1

Lets say that the textarea for the 'other' field is called $other

if(empty($why)){
  $errors[] = 'Please select a reason';
}elseif($why == 'Other' && empty($other)){
  $errors[] = 'You selected Other. Please enter a reason why';
}

Your code will probably need to be more detailed than the above since you're looking to set a minimum and maximum number of characters, but you get the jist?

BTW, I see no reason why you would want to use the === operator instead of the == operator. They do the exact same thing but === checks to see if it's the same type, not sure what good this does for your script.