发布两个不用递归的树形数组构造函数
发布两个不用递归的树形数组构造函数
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->/** * 创建父节点树形数组 * 参数 * $ar 数组,邻接列表方式组织的数据 * $id 数组中作为主键的下标或关联键名 * $pid 数组中作为父键的下标或关联键名 * 返回 多维数组 **/ function find_parent($ar, $id='id', $pid='pid') { foreach($ar as $v) $t[$v[$id]] = $v; foreach ($t as $k => $item){ if( $item[$pid] ){ if( ! isset($t[$item[$pid]]['parent'][$item[$pid]]) ) $t[$item[$id]]['parent'][$item[$pid]] =& $t[$item[$pid]]; } } return $t; } /** * 创建子节点树形数组 * 参数 * $ar 数组,邻接列表方式组织的数据 * $id 数组中作为主键的下标或关联键名 * $pid 数组中作为父键的下标或关联键名 * 返回 多维数组 **/ function find_child($ar, $id='id', $pid='pid') { foreach($ar as $v) $t[$v[$id]] = $v; foreach ($t as $k => $item){ if( $item[$pid] ) { $t[$item[$pid]]['child'][$item[$id]] =& $t[$k]; } } return $t; }
示例
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->$data = array( array('ID'=>1, 'PARENT'=>0, 'NAME'=>'祖父'), array('ID'=>2, 'PARENT'=>1, 'NAME'=>'父亲'), array('ID'=>3, 'PARENT'=>1, 'NAME'=>'叔伯'), array('ID'=>4, 'PARENT'=>2, 'NAME'=>'自己'), array('ID'=>5, 'PARENT'=>4, 'NAME'=>'儿子'), ); $p = find_parent($data, 'ID', 'PARENT'); $c = find_child($data, 'ID', 'PARENT');
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谢谢分享。
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版主辛苦了,多谢分享
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谢谢版主。。学习了。。
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版主的示例写错了一点点 $data;
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数据结构中的ID去掉岂不是更好 不仅少一次循环 还从语法层面拒绝了ID重复的可能
- PHP code
function find_child($ar, $pid='pid') { foreach ($ar as $k => $item){ if( $item[$pid] ) { $ar[$item[$pid]]['child'][$k] = &$ar[$k]; } } return $ar; } function find_parent($ar,$pid='pid') { foreach ($ar as $k => $item){ if( $item[$pid] ){ if( ! isset($ar[$item[$pid]]['parent'][$item[$pid]]) ) $ar[$k]['parent'][$item[$pid]] =& $ar[$item[$pid]]; } } return $ar; } <br><font color="#e78608">------解决方案--------------------</font><br>前排就座,参观学习 <br><font color="#e78608">------解决方案--------------------</font><br> 这两个函数对数组的顺序有要求:<br><br>可以试一下:<br>$data = array(<br> array('ID'=>5, 'PARENT'=>4, 'NAME'=>'d'),<br> array('ID'=>1, 'PARENT'=>0, 'NAME'=>'x'),<br> array('ID'=>2, 'PARENT'=>1, 'NAME'=>'y'),<br> array('ID'=>3, 'PARENT'=>1, 'NAME'=>'z'),<br> array('ID'=>4, 'PARENT'=>2, 'NAME'=>'c'),<br>);<br><br>或者:<br>$data = array(<br> array('ID'=>1, 'PARENT'=>0, 'NAME'=>'a'),<br> array('ID'=>2, 'PARENT'=>1, 'NAME'=>'b'),<br> array('ID'=>3, 'PARENT'=>5, 'NAME'=>'c'),<br> array('ID'=>4, 'PARENT'=>2, 'NAME'=>'d'),<br> array('ID'=>5, 'PARENT'=>1, 'NAME'=>'e'),<br>);<br><br><br>$data = array(<br> array('ID'=>1, 'PARENT'=>0, 'NAME'=>'1'),<br> array('ID'=>2, 'PARENT'=>1, 'NAME'=>'11'),<br> array('ID'=>3, 'PARENT'=>5, 'NAME'=>'12'),<br> array('ID'=>4, 'PARENT'=>2, 'NAME'=>'111'),<br> array('ID'=>5, 'PARENT'=>1, 'NAME'=>'1111'),<br>); <br><font color="#e78608">------解决方案--------------------</font><br> ,,奥妙在于 &<br><br>注意函数名find_parent, find_child,并非构造整个上下级树 <br><font color="#e78608">------解决方案-------------------- <div class="clear"> </div></font>

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