微信小程序中如何将一维数组按条件转换为二维数组?

写个函数，也是来自于tp官方

function list_to_tree($list, $pk='id', $pid = 'pid', $child = '_child', $root = 0) {

// 创建Tree

$tree = array()

if(is_array($list)) {

// 创建基于主键的数组引用

$refer = array()

foreach ($list as $key =>$data) {

$refer[$data[$pk]] =&$list[$key]

}

foreach ($list as $key =>$data) {

// 判断是否存在parent

$parentId = $data[$pid]

if ($root == $parentId) {

$tree[] =&$list[$key]

}else{

if (isset($refer[$parentId])) {

$parent =&$refer[$parentId]

$parent[$child][] =&$list[$key]

}

}

}

}

return $tree

}

然后定义一维数组为$list，然后 print_r(list_to_tree($list,"id","parentsid","subnav"))

微信小程序数组转字符串

var arr = [1,2,3,4,5,6]

var str = arr.join(',')

console.log(str) // 1,2,3,4,5,6

您好。希望可以帮助到你！

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