Random Key in Mysql Database

[ryanzroost]

I am trying to insert a simple randomly generated key into a database and for some reason I can't get it to work.  I have provided the code below.  Help me please!

        <input type="hidden" name="Userhc15_ProjectNumber" id="Userhc15_ProjectNumber" value="<?php echo KT_escapeAttribute($row_rshavecopy15['Userhc15_ProjectNumber']);function randomkeys($length)
{
  $pattern = "1234567890abcdefghijklmnopqrstuvwxyz";
  for($i=0;$i<$length;$i++)
  {
  if(isset($key))
    $key .= $pattern{rand(0,35)};
  else
    $key = $pattern{rand(0,35)};
  }
  return $key;
} ?>"
/>

[taith]

[code]
<?
function randomkeys($length){
$pattern = "1234567890abcdefghijklmnopqrstuvwxyz";
for($i=0;$i<$length;$i++){
  $key .= $pattern{rand(0,35)};
}
return $key;
}
?>
[/code]

[ryanzroost]

I tried to insert the code but it still didn't work.  Would it help if I sent you all of the code, or is there anything else you need to know about what I am doing?  I am fairly new at this.

[taith]

[code]
<?
function randomkeys($length){
$pattern = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
for($i=0;$i<$length;$i++){
  $key .= $pattern{rand(0,62)};
}
return $key;
}
?>

<input type="hidden" name="Userhc15_ProjectNumber" id="Userhc15_ProjectNumber" value="<?=KT_escapeAttribute($row_rshavecopy15['Userhc15_ProjectNumber'])?>"/>

<?=randomkeys(10)?>
[/code]