Displaying php form validation errors like error[] and echoing them out

[OldWest]

Been screwing around on Google for about 3 hours trying to find a tutorial on what I am trying to do with absolutely no luck!

 

I am simply trying to get my test script to echo errors from an array when a form criteria does not validate. This is my final revision which is still not working!

 

Can someone please tell me what I am doing wrong? No matter what I do, I can't get away from this error:

 

Notice: Undefined variable: error in C:\wamp\www\php\form_validation.php on line 13

 

 

<?php 
$o = $error[]; // test
echo $o; // test

if(!preg_match('/[^0-9A-Za-z]/',$_POST['first_name'])) 
{ $error[] = "Please enter a valid First Name";                                               
?>

      <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
      First Name:<br />
         <input name="first_name" type="text" size="50" maxlength="50" /><br /><br />
  
         <input type="submit" /><br /><br />
      </form>

 

[Anti-Moronic]

Are you sure that's all the code? I'm not sure it has pasted well.

 

Instead of

 

form action="<?php echo $_SERVER['PHP_SELF']; ?>"

 

You can just do:

 

form action=""

 

 

[OldWest]

Yes. That's all of the code. Im not trying to do rocket science here. Just trying to figure out how to get an array echoing errors like I suggest.

 

Are you sure that's all the code? I'm not sure it has pasted well.

 

Instead of

 

form action="<?php echo $_SERVER['PHP_SELF']; ?>"

 

You can just do:

 

form action=""

[OldWest]

I realized I left out a bracket, but of course that solved nothing in relation to getting my error[] array to echo.

 

Still hacking away at this trying variations... Any tips or advice is much appreciated..

 

Its as if the array is not holding the data.

[Pikachu2000]

print_r($error);

 

You can't simply echo an entire array.

[Dragosvr92]

You may use HTML5 To Validate forms

but it wont work on older browsers

[OldWest]

Thanks for the tips. I am still working on this, but I was able to get this far with some results. I still have some mixed results though.

 

What I don't understand is why preg_match seems to return TRUE if the results are met, and my errors are thrown then.. Does it seem like I am doing this efficiently?

 

 

<?php 
if(isset($_POST['set_test'])) {

if(preg_match('/[^A-Za-z]/',$_POST['first_name'])) 
{ $error[] = "Please enter a valid First Name"; }
else { $error[] = ""; }

if(preg_match('/[^A-Za-z]/',$_POST['last_name'])) 
{ $error[] = "Please enter a valid Last Name"; }
else { $error[] = ""; }

echo $error[0];
echo $error[1];

}
?>

      <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
      First Name:<br />
         <input name="first_name" type="text" size="50" maxlength="50" /><br /><br />
         Last Name:<br />
         <input name="last_name" type="text" size="50" maxlength="50" /><br /><br />
  <input name="set_test" type="hidden" value="" />
         <input type="submit" /><br /><br />
      </form>

[OldWest]

I had a bunch of issue with my regex and script, but I think I am just about solved... Will post solved when there:

 

<?php 
if(isset($_POST['set_test'])) {

if(!preg_match("/^[A-Za-z' -]{1,50}$/",$_POST['first_name'])) 
{ $error[] = "Please enter a valid First Name"; }
else { $error[] = ""; }

if(!preg_match("/^[A-Za-z' -]{1,50}$/",$_POST['last_name'])) 
{ $error[] = "Please enter a valid Last Name"; }
else { $error[] = ""; }

if(is_array($error)) {

foreach($error as $err_message)
{

echo $err_message . "<br />";

   }

}
//exit();
}
?>