php怎么遍历交叉的多维数组并给其id和pid(父键id)

php如何遍历交叉的多维数组并给其id和pid(父键id)

PHP code

 array(7) {  [1] => array(5) {    ["id"] => string(1) "1"    ["pid"] => string(1) "0"    ["name"] => string(15) "AssetManagement"    ["title"] => string(12) "资产管理"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [2] => array(5) {    ["id"] => string(1) "2"    ["pid"] => string(1) "0"    ["name"] => string(14) "SystemSettings"    ["title"] => string(12) "系统设置"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [3] => array(5) {    ["id"] => string(1) "3"    ["pid"] => string(1) "0"    ["name"] => string(19) "Management"    ["title"] => string(12) "后台管理"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [4] => array(5) {    ["id"] => string(2) "11"    ["pid"] => string(1) "1"    ["name"] => string(9) "HZ"    ["title"] => string(15) "HZ"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [5] => array(5) {    ["id"] => string(2) "10"    ["pid"] => string(1) "1"    ["name"] => string(9) "XM"    ["title"] => string(15) "XM"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [6] => array(5) {    ["id"] => string(1) "9"    ["pid"] => string(1) "1"    ["name"] => string(9) "BJ"    ["title"] => string(15) "BJ"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }    [7] => array(5) {    ["id"] => string(1) "4"    ["pid"] => string(1) "1"    ["name"] => string(20) "TotalManagement"    ["title"] => string(15) "总管理"    ["submenu"] => array(3) {      [0] => array(5) {        ["id"] => string(1) "5"        ["name"] => string(12) "PC"        ["menu_id"] => string(1) "4"        ["title"] => string(17) "PC"        ["access"] => int(1)      }      [1] => array(5) {        ["id"] => string(1) "6"        ["name"] => string(13) "BJB"        ["menu_id"] => string(1) "4"        ["title"] => string(18) "BJB"        ["access"] => int(1)      }      [2] => array(5) {        ["id"] => string(1) "7"        ["name"] => string(16) "Select"        ["menu_id"] => string(1) "4"        ["title"] => string(15) "查询"        ["access"] => int(1)      }    }  }  }怎么把上面的数组写成下面那样？array(3) {  [1] => array(5) {    ["id"] => string(1) "1"    ["pid"] => string(1) "0"    ["name"] => string(15) "AssetManagement"    ["title"] => string(12) "资产管理"    ["submenu"] => array(4) {              [1] => array(5) {            ["id"] => string(2) "11"            ["pid"] => string(1) "1"            ["name"] => string(9) "HZ"            ["title"] => string(15) "HZ"            ["submenu"] => array(1) {              [0] => string(0) ""            }          }          [2] => array(5) {            ["id"] => string(2) "10"            ["pid"] => string(1) "1"            ["name"] => string(9) "XM"            ["title"] => string(15) "XM"            ["submenu"] => array(1) {              [0] => string(0) ""            }          }          [3] => array(5) {            ["id"] => string(1) "9"            ["pid"] => string(1) "1"            ["name"] => string(9) "BJ"            ["title"] => string(15) "BJ"            ["submenu"] => array(1) {              [0] => string(0) ""            }          }                    [4] => array(5) {            ["id"] => string(1) "4"            ["pid"] => string(1) "1"            ["name"] => string(20) "TotalManagement"            ["title"] => string(15) "总管理"            ["submenu"] => array(3) {              [0] => array(5) {                ["id"] => string(1) "5"                ["name"] => string(12) "PC"                ["menu_id"] => string(1) "4"                ["title"] => string(17) "PC"                ["access"] => int(1)              }              [1] => array(5) {                ["id"] => string(1) "6"                ["name"] => string(13) "BJB"                ["menu_id"] => string(1) "4"                ["title"] => string(18) "BJB"                ["access"] => int(1)              }              [2] => array(5) {                ["id"] => string(1) "7"                ["name"] => string(16) "Select"                ["menu_id"] => string(1) "4"                ["title"] => string(15) "查询"                ["access"] => int(1)              }            }          }                                }  }  [2] => array(5) {    ["id"] => string(1) "2"    ["pid"] => string(1) "0"    ["name"] => string(14) "SystemSettings"    ["title"] => string(12) "系统设置"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }  [3] => array(5) {    ["id"] => string(1) "3"    ["pid"] => string(1) "0"    ["name"] => string(19) "Management"    ["title"] => string(12) "后台管理"    ["submenu"] => array(1) {      [0] => string(0) ""    }  }    } 
 

PHP code

foreach($arr as $key=>$value){  if($value['pid']=='0')  {    $array[$value['id']] = $value;  }  else  {    $array[$value['pid']]['submenu'][] = $value;  }}