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Refactoring Str class.

This commit is contained in:
Taylor Otwell 2011-07-07 07:14:57 -07:00
parent 607b23b742
commit c50246c694
1 changed files with 23 additions and 21 deletions
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44
system/str.php
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@ -70,28 +70,8 @@ public static function random($length = 16, $type = 'alnum')
{
$value = '';
// -----------------------------------------------------
// Get the proper character pool for the type.
// -----------------------------------------------------
switch ($type)
{
case 'alpha':
$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
break;
$pool_length = strlen($pool = static::pool($type)) - 1;
default:
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
}
// -----------------------------------------------------
// Get the pool length and split the pool into an array.
// -----------------------------------------------------
$pool_length = strlen($pool) - 1;
$pool = str_split($pool, 1);
// -----------------------------------------------------
// Build the random string to the specified length.
// -----------------------------------------------------
for ($i = 0; $i < $length; $i++)
{
$value .= $pool[mt_rand(0, $pool_length)];
@ -100,4 +80,26 @@ public static function random($length = 16, $type = 'alnum')
return $value;
}
/**
* Get a chracter pool.
*
* @param string $type
* @return string
*/
private static function pool($type = 'alnum')
{
if ($type == 'alnum')
{
return '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
}
elseif ($type == 'alpha')
{
return 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
}
else
{
throw new \Exception("Unrecognized random pool [$type].");
}
}
}