Validating multiple check boxes with different names to make sure at least 1 is checked

Question

I have a PHP form with several check boxes (not groups) with different names that when submitted get sent to an array and emailed. The problem I am having is that I am looking for a way to validate that at least one of the check boxes is checked upon submit. I know how to do one check box or to do check box groups but not this. How can this be done? If someone could point me in the right direction I would be grateful.

I am adding the code for the section of the form I am asking about.

  



   
        
            Please Select at least one:
        
 Type of Alleged Occurrence:
                            
                            
                                 Disruption:
>Obscene language 
                                    
                                     Sexual Harassment:
  >Physical         
                                      >Verbal 




 Altercation:

>Verbal

  >Physical 




                                    Involved in altercation:




 >Student/Student 


>Student/Faculty-Staff 




 Theft/ Damage to Property:
  >DACC        >Self 



  

                                     >Faculty/Staff 




  
    Threat of Harm to Self or Others:
  >
Student/Student      >Self 





                                    
            
                             >Student/Faculty-Staff 



              


 Drugs/Alcohol:
  >Under the Influence        >Possession 








    Other Occurrences:
  >Trespassing      >Other

Ben D · Accepted Answer

Depending on your form structure, you're going to need to use the isset() check. Assuming you're NOT posting as an array (...etc, you can do it this way:

validate with...

$require_one_of = array('cb1','cb2',...etc); //names of posted checkboxes
$one_set=false;
foreach($require_one_of as $key){
   if(isset($_POST[$key])){
      $one_set=true;
      break;
   }
}
if(!$one_set){
   //error handling
}

If you are posting as an array, then you can just check if the array is set:

validate with

Note: I'm assuming here that you're using post as for form submission method

Validating multiple check boxes with different names to make sure at least 1 is checked

Answers (1)

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