PHP：数组的排序函数:

数组的排序函数:1.sort();不带key升序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); sort($arr); echo pre; print_r($arr); echo /pre; ?结果 是Array ( [0] 0 [1] 2 [2] 3 [3] 5 [4] 7 [5] 8 [6] 611 [7] 1111 [8] 1114 [9] 5669 [10] 187780 )2.rsort();不带key倒序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); rsort($arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [0] 187780 [1] 5669 [2] 1114 [3] 1111 [4] 611 [5] 8 [6] 7 [7] 5 [8] 3 [9] 2 [10] 0 )3.asort();带key升序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); asort($arr); echo pre; print_r($arr); echo /pre; ?**Array ( [0] 0 [2] 2 [3] 3 [5] 5 [7] 7 [8] 8 [6] 611 [1] 1111 [4] 1114 [9] 5669 [10] 187780 )4.arsort();带key降序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); arsort($arr); echo pre; print_r($arr); echo /pre; ?结果 是Array ( [10] 187780 [9] 5669 [4] 1114 [1] 1111 [6] 611 [8] 8 [7] 7 [5] 5 [3] 3 [2] 2 [0] 0 )5.ksort();按key升序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); ksort($arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [0] 0 [1] 1111 [2] 2 [3] 3 [4] 1114 [5] 5 [6] 611 [7] 7 [8] 8 [9] 5669 [10] 187780 )6.krsort();按key倒序排序.**?php $arrarray(0,1111,2,3,1114,5,611,7,8,5669,187780); krsort($arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [10] 187780 [9] 5669 [8] 8 [7] 7 [6] 611 [5] 5 [4] 1114 [3] 3 [2] 2 [1] 1111 [0] 0 )7.natsort();按自然数排序.**?php $arrarray(linux,php,java,javascript,html5,css3); natsort($arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [5] css3 [4] html5 [2] java [3] javascript [0] linux [1] php )**?php $arrarray(linux,php,java,javascript,html5,css3); natsort($arr); $arrarray_reverse($arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [0] php [1] linux [2] javascript [3] java [4] html5 [5] css3 )8.natcasesort();按忽略大小写的自然数排序.**?php $arrarray(linux,php,java,javascript,html5,css3,LINUX); natcasesort($arr); echo pre; print_r($arr); echo /pre; ?*结果是 *Array ( [5] css3 [4] html5 [2] java [3] javascript [0] linux [6] LINUX [1] php )9.array_multisort();多数组排序.**?php $arrarray( title1linux, title2linux is very muchand i love small ma, title3php is very much, title4js ); foreach($arr as $val){ $row[]strlen($val); } array_multisort($row,SORT_DESC,$arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [title2] linux is very muchand i love small ma [title3] php is very much [title1] linux [title4] js )**?php $arrarray( title1linux, title2linux is very muchand i love small ma, title3php is very much, title4js ); foreach($arr as $val){ $row[]strlen($val); } array_multisort($row,SORT_ASC,$arr); echo pre; print_r($arr); echo /pre; ?结果是Array ( [title4] js [title1] linux [title3] php is very much [title2] linux is very muchand i love small ma )