PHP: Check if FORM values are empty

Question

I'm checking to make sure all incoming $_POST values are not empty. is using isEmpty the best method. This is a second check prior to db entry, I'm already using a jquery form validate

if (!isEmpty($_POST['add']) || ($_POST['add']['type'] == 2 && !isEmpty($_POST['cpl']))):
    // insert into db
else:
    header("Location: /?req=register");
    exit();
endif;

I think you are thinking of !empty($_POST['add']) php.net/manual/en/function.empty.php — Moak
– Moak, Commented Jan 26, 2013 at 5:30
@Moak thanks, not sure what i was thinking when I typed that — acctman
– acctman, Commented Jan 26, 2013 at 5:34

Rakesh Sharma · Accepted Answer · 2013-01-26 05:36:57Z

6

try this

if (isset($_POST['add']) AND $_POST['add'] != '')

you can chcek in many way using also NULL

answered Jan 26, 2013 at 5:36

Rakesh Sharma

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Comments

Kermit · Accepted Answer · 2013-01-26 05:30:59Z

1

Be careful, as empty (no such thing as isEmpty) considers some values as empty.

The following things are considered to be empty:

"" (an empty string)
0 (0 as an integer)
0.0 (0 as a float)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
$var; (a variable declared, but without a value)

You can just use if($_POST['add'] <> '') ...

answered Jan 26, 2013 at 5:30

Kermit

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5 Comments

acctman Over a year ago

thanks, what should I use instead of !Empty to check if the values and nothing in them?

Kermit Over a year ago

You can just use if($_POST['add'] <> '') ...

acctman Over a year ago

something like this would work fine correct? if ($_POST['add'] != '' || ($_POST['add']['type'] == 2 && $_POST['cpl'] != '')):

Antony Over a year ago

@njk Wouldn't if ($_POST['add'] <> '') throw a php notice if it is undefined?

Kermit Over a year ago

@Antony I'm assuming it would be defined and depends on the error reporting.

Sahal · Accepted Answer · 2013-01-26 05:40:01Z

0

you can use isset to see whether the variable is set or not. This will help in radio and checkbox if you have not selected.

 (isset($_POST['add']) && $_POST['add'] != '')

You can also use !empty($_POST['add'])

answered Jan 26, 2013 at 5:40

Sahal

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