while(){ switch(){} } problem!

[samoi]

Hello guys!

 

I just wanted to do something fun like a special code decoding !!

 

so I coded the following:

 

<?
error_reporting(E_ALL & E_NOTICE);
$str = "samoi";
$char = " ";
$i = 0;
while($i < strlen($str)){

$subtype = substr($str, $i, 1);

switch ($subtype)
{

case "s":
	$char. = "S";
	break;



case "m":
	$char. = "U";
	break;

case "a":
	$char. = "L";
	break;

case "o";
	$char. = "I";
	break;

case "i";
	$char. = "M";
	break;

default:
	$char. = $subtype;


}



$i++;
}

echo $char;

?>

 

 

returns a blank page !!!

 

please help!

[smerny]

there's a better way to do this using arrays and preg_replace... try this

 

$find = array('s','m','a','o','i');
$replace = array('S','U','L','I','M');

echo preg_replace ($find, $replace, $str);

[mikesta707]

if you are just replacing single characters, and not matching against patterns, using str_replace would be faster