[SOLVED] Undefined index:

[zavin]

The Code:

if($_POST['submit'] != "")

{  //My code to do what Submit needs to do goes here.

}

Submit is not defined until the user clicks submit, so I get Notice: Undefined index: Submit. I know that I can turn off E_NOTICE so that the notice will not show up. I just want to know is there a better way to write this and is there any security risk by having it written this way.

 

 

 

[Andy-H]

 

if ( isSet($_POST['submit']) )
{
  // Code
}

 

That should work?

[zavin]

That works great in most cases, but what if I need $_POST['submit'] to "==" or "!=".

[taquitosensei]

if(isset($_POST['submit']) && $_POST['submit']!="Whatever")) // or =="Whatever"

{

// Do stuff here

}

[Andy-H]

try,

 

if ( ( isSet($_POST['submit']{3}) ) && ($_POST['submit'] == "Submit Data") )
{
   /*code
      The {3} is the minimum accepted chars for the value - 1
     i.e. $_POST['submit']{3} will accept a value of 4+ chars.
    if you want a specific value use the && condition and chect the data after the isSet()
    call */
}

[zavin]

Thanks Andy, Problems solved and I learned something.