[SOLVED] php forms - Picky text inputs...?

[ag3nt42]

Hello again all,

 

I find myself in a situation where I can't have the user put in wrong information or the process I have going will screw up.. And There is to much variation in the input to restrict it to a selection box. or the like...

 

I want to be able to tell the text input which characters its allowed to accept and in what format...

any one have ne ideas on this one? ???

 

~thanks all.

[FlyingIsFun1217]

Maybe have an array of dis/allowed characters, and do a check to see if they are contained within the result?

 

FlyingIsFun1217

[The Little Guy]

The following will only accept numbers and letters:

 

$str = 'This is a string with the number 01.';
$isGood = FALSE;
foreach(str_split($str) as $val){
if(ctype_alnum($val)){
	$isGood = TRUE;
}else{
	$isGood = FALSE;
}
}

if($isGood){
echo "String is valid.";
}else{
echo "String is not valid.";
}

[ag3nt42]

i need it to restrict input like this:

 

must be 4 char long exactly

 

no letters just num.

[Gighalen]

i need it to restrict input like this:

 

must be 4 char long exactly

 

no letters just num.

 

Get fancy with some if/else

 

http://us.php.net/manual/en/function.strlen.php

 

http://us.php.net/manual/en/function.is-numeric.php

[haku]

if(!ereg("^[0-9]+$", $_POST['input']) || strlen($_POST['input']) > 4 || strlen($_POST['input']) < 4)
{
   die("error");
}
else
{
   echo "success";
}

[ag3nt42]

if(!ereg("^[0-9]+$", $_POST['input']) || strlen($_POST['input']) > 4 || strlen($_POST['input']) < 4)
{
   die("error");
}
else
{
   echo "success";
}

 

precisely what I was looking for.. thanks you much haku..

 

i only had to alter it alil bit..

 

///////////////////////////
/// Validate Year Input ///
///////////////////////////
if (!(isset($_GET['year'])))
{
echo("");
}
else
{
if(!ereg("^[0-9]+$", $_GET['year']) || strlen($_GET['year']) > 4 || strlen($_GET['year']) < 4)
{
   die("<script>alert(VAL);</script>");
}
else
{
   	 	echo "success";
}
}