Form validation

[vern]

I want to make sure that forms that are being submitted have content. How do we check if a field is empty when it is submitted?

I'm guessing

if (isset($_POST['item']))
{
   do this ....
}
else
   echo 'error';

What is the correct way of making sure a field is not empty?

[litebearer]

A note...

this will result in 'Set' being echoed

PHP Code:

$var = "";
if (isset($var)) {
  echo "set";
} else {
echo "not set";
} 


you might also check to see that the variable actually contains something

ie..

PHP Code:


$var = $_POST['var'];

if (strlen(trim($var)) <0) {
  // the variable is either empty or not set
] else {
  // there is something in the variable
} 


Lite...

[Nightfire]

Or, to make it easier for yourself, use the empty() function

if(empty($_POST['item'])){
echo 'Item is empty';
}else{
echo 'Item is filled';
}

[vern]

Looks good. Thanks!