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redir/application/classes/lnapp/sort.php

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2011-07-20 12:57:07 +00:00
<?php defined('SYSPATH') or die('No direct access allowed.');
/**
* This class is used to sort multiple dimension arrays.
*
* @package lnApp
* @subpackage Sort
* @category Helpers
* @author Deon George
* @copyright (c) 2010 Deon George
* @license http://dev.leenooks.net/license.html
* @uses Style
*/
class lnApp_Sort {
/**
* Sort a multi dimensional array.
*
* @param array Multi demension array passed by reference
* @param string Comma delimited string of sort keys.
* @param boolean Whether to reverse sort.
* @return array Sorted multi demension array.
*/
public static function masort(&$data,$sortby,$rev=0) {
// if the array to sort is null or empty
if (! $data)
return;
static $MASORT_CACHE = array();
if (empty($MASORT_CACHE[$sortby])) {
$code = "\$c=0;\n";
foreach (explode(',',$sortby) as $key) {
$code .= "if (is_object(\$a) || is_object(\$b)) {\n";
$code .= " if (is_array(\$a->$key)) {\n";
$code .= " asort(\$a->$key);\n";
$code .= " \$aa = array_shift(\$a->$key);\n";
$code .= " } else\n";
$code .= " \$aa = \$a->$key;\n";
$code .= " if (is_array(\$b->$key)) {\n";
$code .= " asort(\$b->$key);\n";
$code .= " \$bb = array_shift(\$b->$key);\n";
$code .= " } else\n";
$code .= " \$bb = \$b->$key;\n";
$code .= " if (\$aa != \$bb)";
if ($rev)
$code .= " return (\$aa < \$bb ? 1 : -1);\n";
else
$code .= " return (\$aa > \$bb ? 1 : -1);\n";
$code .= "} else {\n";
$code .= " \$a = array_change_key_case(\$a);\n";
$code .= " \$b = array_change_key_case(\$b);\n";
$key = strtolower($key);
$code .= " if ((! isset(\$a['$key'])) && isset(\$b['$key'])) return 1;\n";
$code .= " if (isset(\$a['$key']) && (! isset(\$b['$key']))) return -1;\n";
$code .= " if ((isset(\$a['$key'])) && (isset(\$b['$key']))) {\n";
$code .= " if (is_array(\$a['$key'])) {\n";
$code .= " asort(\$a['$key']);\n";
$code .= " \$aa = array_shift(\$a['$key']);\n";
$code .= " } else\n";
$code .= " \$aa = \$a['$key'];\n";
$code .= " if (is_array(\$b['$key'])) {\n";
$code .= " asort(\$b['$key']);\n";
$code .= " \$bb = array_shift(\$b['$key']);\n";
$code .= " } else\n";
$code .= " \$bb = \$b['$key'];\n";
$code .= " if (\$aa != \$bb)\n";
$code .= " if (is_numeric(\$aa) && is_numeric(\$bb)) {\n";
if ($rev)
$code .= " return (\$aa < \$bb ? 1 : -1);\n";
else
$code .= " return (\$aa > \$bb ? 1 : -1);\n";
$code .= " } else {\n";
if ($rev)
$code .= " if ( (\$c = strcasecmp(\$bb,\$aa)) != 0 ) return \$c;\n";
else
$code .= " if ( (\$c = strcasecmp(\$aa,\$bb)) != 0 ) return \$c;\n";
$code .= " }\n";
$code .= " }\n";
$code .= "}\n";
}
$code .= 'return $c;';
$MASORT_CACHE[$sortby] = create_function('$a, $b',$code);
}
uasort($data,$MASORT_CACHE[$sortby]);
}
}
?>