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<?php
/**
* Replace str_split()
*
* @category PHP
* @package PHP_Compat
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @link http://php.net/function.str_split
* @author Aidan Lister <aidan@php.net>
* @version $Revision: 1.1 $
* @since PHP 5
* @require PHP 4.0.0 (user_error)
*/
function php_compat_str_split($string, $split_length = 1)
{
if (!is_scalar($split_length)) {
user_error('str_split() expects parameter 2 to be long, ' .
gettype($split_length) . ' given', E_USER_WARNING);
return false;
}
$split_length = (int) $split_length;
if ($split_length < 1) {
user_error('str_split() The length of each segment must be greater than zero', E_USER_WARNING);
return false;
}
// Select split method
if ($split_length < 65536) {
// Faster, but only works for less than 2^16
preg_match_all('/.{1,' . $split_length . '}/s', $string, $matches);
return $matches[0];
} else {
// Required due to preg limitations
$arr = array();
$idx = 0;
$pos = 0;
$len = strlen($string);
while ($len > 0) {
$blk = ($len < $split_length) ? $len : $split_length;
$arr[$idx++] = substr($string, $pos, $blk);
$pos += $blk;
$len -= $blk;
}
return $arr;
}
}
// Define
if (!function_exists('str_split')) {
function str_split($string, $split_length = 1)
{
return php_compat_str_split($string, $split_length);
}
}
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