simple form validation

[tolkienarda]

hi all

I need to make sure someone entered some data into a form i am not concerned on this particular site about hacks or malatious injection so i just need to make sure the person entered somthing into each field. i currently send the results of my form to a remote php page. here are the names of the form fields and the basic form check as far as i have gotten. my question is if blank inputs are sent as null vlaues or if they have some random vlaue.

[HTML]
<form target="mailer. php" action="post">
<input type="text" name="email">
<input type="text" name="first_nam e">
<input type="text" name="last_name ">
<input type="text" name="address">
<input type="text" name="city">
<input type="text" name="state">
<input type="text" name="zip_code" >
</form>
[/HTML]

[PHP]
if ($_POST[email] = WHAT GOES HERE || $_POST[first_name] || $_POST[last_name] || $_POST[address] || $_POST[city] || $_POST[state] || $_POST[zip_code])
{
$url= "failed.htm ";
}

[/PHP]

thanks for any and all help

[Motoma]

hi all

I need to make sure someone entered some data into a form i am not concerned on this particular site about hacks or malatious injection so i just need to make sure the person entered somthing into each field. i currently send the results of my form to a remote php page. here are the names of the form fields and the basic form check as far as i have gotten. my question is if blank inputs are sent as null vlaues or if they have some random vlaue.

[HTML]
<form target="mailer. php" action="post">
<input type="text" name="email">
<input type="text" name="first_nam e">
<input type="text" name="last_name ">
<input type="text" name="address">
<input type="text" name="city">
<input type="text" name="state">
<input type="text" name="zip_code" >
</form>
[/HTML]

[PHP]
if ($_POST[email] = WHAT GOES HERE || $_POST[first_name] || $_POST[last_name] || $_POST[address] || $_POST[city] || $_POST[state] || $_POST[zip_code])
{
$url= "failed.htm ";
}

[/PHP]

thanks for any and all help

I am not quite sure what your question is. Please elaborate.

[tolkienarda]

I am not quite sure what your question is. Please elaborate.

ok so basicaly I need to see rather the post values i am reciving from the forms is vlaid. i dont realy care about injection or special chars or any kind of security checking i just want to know if some kind of data was entered into of each of the input boxes. if they were i want it to set $url to equal to failed.htm so i can tell the users that they need to complete the form. so the section in my code that says WHAT GOES HERE i need to know what would be sent if the input boxes were left blank

thanks
eric

[Motoma]

To check if the user entered data for all fields, you would do something like this:

if(!isset($_POST['email']) || !isset($_POST['fullname']))
{
    $url = "failure.html";
}

[tolkienarda]

ah
i always wondered what that little thing ment. well now i know

thanks
eirc

[ronverdonk]

I am sorry to spoil the party, but when the user did not enter any data, but left it blank, the isset() function will return true.

Just checking if a value (no blank) has been entered:[php]if ( strlen(trim($_P OST['email'])) < 1
OR strlen(trim($_P OST['first_name'])) < 1
OR strlen(trim($_P OST['last_name'])) < 1
OR strlen(trim($_P OST['address'])) < 1
OR strlen(trim($_P OST['city'])) < 1
OR strlen(trim($_P OST['state'])) < 1
OR strlen(trim($_P OST['zip_code'])) < 1 )
{
$url= "failed.htm ";
} [/php]Ronald :cool:

[tolkienarda]

Thank ya ron

this little script isn't done so i will be posting next time i get stuck (soon)

thanks again
eirc