Home >Backend Development >PHP Tutorial >一个数组根据另一个数组来排序
<code>$a = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ) ); $b = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 2, 'cname' => '歌剧' ), Array ( 'cid' => 3, 'cname' => '美剧' ), Array ( 'cid' => 4, 'cname' => '视频' ), Array ( 'cid' => 5, 'cname' => '娱乐' ), Array ( 'cid' => 6, 'cname' => '联系' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ) ); $c = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ), Array ( 'cid' => 2, 'cname' => '歌剧' ), Array ( 'cid' => 3, 'cname' => '美剧' ), Array ( 'cid' => 4, 'cname' => '视频' ), Array ( 'cid' => 5, 'cname' => '娱乐' ), Array ( 'cid' => 6, 'cname' => '联系' ) );</code>
已知$a,参照$a把$b排序成$c的样子。
<code>$a = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ) ); $b = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 2, 'cname' => '歌剧' ), Array ( 'cid' => 3, 'cname' => '美剧' ), Array ( 'cid' => 4, 'cname' => '视频' ), Array ( 'cid' => 5, 'cname' => '娱乐' ), Array ( 'cid' => 6, 'cname' => '联系' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ) ); $c = Array ( Array ( 'cid' => 1, 'cname' => '关于' ), Array ( 'cid' => 7, 'cname' => '简介' ), Array ( 'cid' => 8, 'cname' => '文化' ), Array ( 'cid' => 9, 'cname' => '动态' ), Array ( 'cid' => 2, 'cname' => '歌剧' ), Array ( 'cid' => 3, 'cname' => '美剧' ), Array ( 'cid' => 4, 'cname' => '视频' ), Array ( 'cid' => 5, 'cname' => '娱乐' ), Array ( 'cid' => 6, 'cname' => '联系' ) );</code>
已知$a,参照$a把$b排序成$c的样子。
使用自定义排序函数usort来一发
<code><?php class SortByArray { public $ref; public $array; public function __construct($ref,$array){ $this->ref = $ref; $this->array = $array; usort($this->array,function($t1,$t2){ $p1 = array_search($t1,$this->ref); $p2 = array_search($t2,$this->ref); if(($p1===false||$p1===null) && ($p2===false||$p2===null)) return array_search($t1,$this->array)<array_search>array) ? -1 :1; if($p1===$p2) return 0; if($p1===false||$p1===null) return 1; if($p2===false||$p2===null) return -1; return $p1array); ?></array_search></code>
这个应该是多维数组排序问题,php中的 array_multisort可以用于多维数组排序。
具体实现代码就不写了,可以看看手册自己琢磨一下。
<code>/** * [oneArrayTo 二维数组按某个数组值排序 一对多] * @param [type] $a [参照数组] * @param [type] $b [这个是要被排序的数组] * @param [type] $keyword [键值] * @return [type] [description] */ function oneArrayTo($a,$b,$keyword) { $newa = array(); foreach ($a as $key => $value) { $newa[] = $value[$keyword]; } $newa = array_flip($newa); $newb = array(); foreach ($b as $key => $value) { $newb[] = $value[$keyword]; } $newb = array_flip($newb); $d = $newb; foreach ($newb as $k => $v) { foreach ($newa as $key => $value) { if($key == $k) { unset($d[$k]); } } } $c = array_flip($newa); $d = array_flip($d); $p = array_merge($c,$d); $p = array_flip($p); $newbb = array(); foreach ($b as $key => $value) { $newbb[$value[$keyword]] = $value; } $g = array(); foreach ($p as $key => $value) { $g[] = $newbb[$key]; } return $g; }</code>
自己写好了,虽然是笨方法。