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1 <?php 2 /** 3 * Helper class for sorting arrays on arbitrary criteria for usort/uasort. 4 * 5 * Copyright 2003-2017 Horde LLC (http://www.horde.org/) 6 * 7 * See the enclosed file LICENSE for license information (LGPL). If you 8 * did not receive this file, see http://www.horde.org/licenses/lgpl21. 9 * 10 * @author Marko Djukic <marko@oblo.com> 11 * @author Jan Schneider <jan@horde.org> 12 * @author Michael Slusarz <slusarz@horde.org> 13 * @category Horde 14 * @license http://www.horde.org/licenses/lgpl21 LGPL 2.1 15 * @package Util 16 */ 17 class Horde_Array_Sort_Helper 18 { 19 /** 20 * The array key to sort by. 21 * 22 * @var string 23 */ 24 public $key; 25 26 /** 27 * Compare two associative arrays by the array key defined in self::$key. 28 * 29 * @param array $a 30 * @param array $b 31 */ 32 public function compare($a, $b) 33 { 34 return strcoll(Horde_String::lower($a[$this->key], true, 'UTF-8'), Horde_String::lower($b[$this->key], true, 'UTF-8')); 35 } 36 37 /** 38 * Compare, in reverse order, two associative arrays by the array key 39 * defined in self::$key. 40 * 41 * @param scalar $a TODO 42 * @param scalar $b TODO 43 * 44 * @return TODO 45 */ 46 public function reverseCompare($a, $b) 47 { 48 return strcoll(Horde_String::lower($b[$this->key], true, 'UTF-8'), Horde_String::lower($a[$this->key], true, 'UTF-8')); 49 } 50 51 /** 52 * Compare array keys case insensitively for uksort. 53 * 54 * @param scalar $a TODO 55 * @param scalar $b TODO 56 * 57 * @return TODO 58 */ 59 public function compareKeys($a, $b) 60 { 61 return strcoll(Horde_String::lower($a, true, 'UTF-8'), Horde_String::lower($b, true, 'UTF-8')); 62 } 63 64 /** 65 * Compare, in reverse order, array keys case insensitively for uksort. 66 * 67 * @param scalar $a TODO 68 * @param scalar $b TODO 69 * 70 * @return TODO 71 */ 72 public function reverseCompareKeys($a, $b) 73 { 74 return strcoll(Horde_String::lower($b, true, 'UTF-8'), Horde_String::lower($a, true, 'UTF-8')); 75 } 76 77 }
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