php - Submit form if condition is true - Stack Overflow

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I have this form:

<form action="" target="_blank" method="post" name="xyz" id="abc">
      <input type="hidden" name="email" value="user_email" />
      <input type="submit" name="sbmt" id="sbmt" value="user_value" class="user_class"/>
</form>

Suppose there is a variable VAR. The form can be submitted only when the value of VAR is 1.

In detail On click on submit it will firstly check the value of VAR and if it returns true from will submitted and redirect to page given in action. And if it returns False it will show a message that Please check value of VAR

Imp VAR is not the field of form. We are getting this value from database.

I have this form:

<form action="http://targatesite." target="_blank" method="post" name="xyz" id="abc">
      <input type="hidden" name="email" value="user_email" />
      <input type="submit" name="sbmt" id="sbmt" value="user_value" class="user_class"/>
</form>

Suppose there is a variable VAR. The form can be submitted only when the value of VAR is 1.

In detail On click on submit it will firstly check the value of VAR and if it returns true from will submitted and redirect to page given in action. And if it returns False it will show a message that Please check value of VAR

Imp VAR is not the field of form. We are getting this value from database.

• php
• javascript
• jquery
• html

Share Improve this question Follow edited Aug 6, 2013 at 10:33 fnkr 10.1k66 gold badges5757 silver badges6262 bronze badges asked Aug 6, 2013 at 10:25 mayankmayank 7522 gold badges22 silver badges66 bronze badges 1

• One more amendment in question If VAR=1 the form should be successfully submitted. And if not it should show error that "check the value of VAR. " – mayank Commented Aug 6, 2013 at 10:54

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4 Answers 4

Sorted by: Reset to default 5

Add onSubmit="return submit();"

<form action="http://targatesite." target="_blank" method="post" name="xyz" id="abc"> <input type="hidden" name="email" value="user_email" />    
    <input type="submit" name="sbmt" id="sbmt" value="user_value" class="user_class" onSubmit="return submit();"/> 
    </form>

Try this Script :

 function submit(){
            if(var==1){
                return true;
           }
           else{
               alert("Please check value of VAR")
               return false;
           }
    }

$('#abc').on('submit', function(){
     if(VAR == 1){
        return true;  
     } 
   alert('Please check value of VAR');
   return false;
});

This will work. The only thing you need to check is that VAR is in the scope of this function.

try this

var MYVAR=true;
$('#abc').submit(function(){
     if(MYVAR){
        return true;  
     } 
   alert('check the value of VAR');
   return false;
});

Yes you can check VAR variable value from database,

when you have to submit form, you can code like this

if($_POST['sbmt']){
 $query = 'SELECT var FROM tablename';
 // here you can check var value
 if(VAR==1){
  //submit your form
 } else {
  $error_msg = 'Please check value of VAR';
 }
}

print this $error_msg whenever you want to show.

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