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我有mysql查询,它将以tbl_posts的形式返回数据作为数组。该阵列显示如下如何从多维数组中列出父亲子女关系,如果同一孩子有多个父母
$tree = array(
'C1' => 'P1',//C1 is the child of P1
'C2' => 'P1',//C2 is the child of P1
'C3' => 'P2',//C3 is the child of P1
'C4' => 'P3',//C4 is the child of P1
'GC1' => 'C1',//GC1 is the child of C1
'GC1' => 'C2',//GC1 is the child of C2
'GC2' => 'C1',//GC2 is the child of C1
'GC2' => 'C2',//GC2 is the child of C2
'GC2' => 'C4',//GC2 is the child of C4
'P1' => null,//parent post P1
'P2' => null,//parent post P2
'P3' => null,//parent post P3
);
这里P1,P2,P3是父职位,C1,C2,C3 ..是孩子的职位和GC1,GC2他们之间的父子关系,GC3 ......是盛大孩子根据查询返回的数组。 我想按照如下
- P1
-- C1
--- GC1
--- GC2
-- C2
--- GC1
--- GC2
- P2
-- C3
-P3
-- C4
--- GC2
的父子关系列出这些数据我已经尝试了这种代码如下
function parseTree($tree, $root = null) {
$return = array();
foreach($tree as $child => $parent) {
if($parent == $root) {
$return[] = array(
'parent' => $child,
'child' => parseTree($tree, $child)
);
}
}
return empty($return) ? null : $return;
}
function printTree($tree) {
if(!is_null($tree) && count($tree) > 0) {
echo '<ul>';
foreach($tree as $node) {
echo '<li>'.$node['parent'];
printTree($node['child']);
echo '</li>';
}
echo '</ul>';
}
}
$result = parseTree($tree);
echo "<pre>";
printTree($result);
,我得到的结果如下
P1
C1
C2
GC1
P2
C3
P3
C4
GC2
大孩子只被列出一次。 GC1,GC2和GC3是C1,C2和C3的子码,但它们只列出一次。如果同一个孩子在这种情况下有多个父母,我如何列出父母亲的关系?谢谢。