checking for case

[marcnyc]

hello, i was wondering if there is a php function or way that will allow me to check for the case of a letter of a string...

i am hoping for something like:
$string = 'Test';
if ( isuppercase($string{3}) ) { TRUE } else { FALSE }
which would return FALSE for $string{3} and TRUE for $string{0}

I have written this:

	if ( $array[$i] == strtoupper($array[$i]) ) {
		$folder = 'uc';
	} else {
		$folder = 'lc';
	}

which works, I was just wondering if there is a function in the manual that I missed...

[bpat1434]

No function in the manual, but there is a simpler way:
[man]ord/man

You could do something like this:

function isuppercase($char)
{
  if(ord($char)>64 && ord($char)<91)
  {
    return TRUE;
  }
  elseif(ord($char)>96 && ord($char)<123)
  {
    return FALSE;
  }
  else
  {
    return 'Non Alpha Character';
  }
}

$string = 'TeSt!';

for($i=0; $i<strlen($string); $i++)
{
  echo 'Character '.$i.' [<strong>'.$string{$i}.'</strong>] ';

  if( ($isupper = isuppercase($string{$i})) !== 'Non Alpha Character' )
  {
    if($isupper)
    {
      echo 'Is uppercase';
    }
    else
    {
      echo 'Is not uppercase';
    }
  }
  else
  {
    echo 'Is not an alpha character';
  }
  echo '<br>'."\n";
}

Output:

Character 0 [T] Is uppercase
Character 1 [e] Is not uppercase
Character 2 [S] Is uppercase
Character 3 [t] Is not uppercase
Character 4 [!] Is not an alpha character

[marcnyc]

good idea... thanks

[laserlight]

You can use [man]ctype_upper/man or [man]ctype_lower/man.

[marcnyc]

That's exactly the function I was hoping existed but didn't know about it...
Thanks a lot!