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<?php $arr = [ 0=>['id'=>1,'name'=>'父1','father'=>0], 1=>['id'=>2,'name'=>'父2','father'=>0], 2=>['id'=>3,'name'=>'父3','father'=>0], 3=>['id'=>4,'name'=>'儿1-1','father'=>1], 4=>['id'=>5,'name'=>'儿1-2','father'=>1], 5=>['id'=>6,'name'=>'儿1-3','father'=>1], 6=>['id'=>7,'name'=>'儿2-1','father'=>2], 7=>['id'=>8,'name'=>'儿2-1','father'=>2], 8=>['id'=>9,'name'=>'儿3-1','father'=>3], 9=>['id'=>10,'name'=>'儿3-1-1','father'=>9], 10=>['id'=>11,'name'=>'儿1-1-1','father'=>4], 11=>['id'=>12,'name'=>'儿2-1-1','father'=>7], ]; function generateTree($arr,$id,$step){ static $tree=[]; foreach($arr as $key=>$val) { if($val['father'] == $id) { $flg = str_repeat('└―',$step); $val['name'] = $flg.$val['name']; $tree[] = $val; generateTree($arr , $val['id'] ,$step+1); } } return $tree; } $tree = generateTree($arr,0,0); print_r($tree); foreach ($tree as $val){ echo $val['name'].'<br>'; }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
Array ( [0] => Array ( [id] => 1 [name] => 父1 [father] => 0 ) [1] => Array ( [id] => 4 [name] => └―儿1-1 [father] => 1 ) [2] => Array ( [id] => 11 [name] => └―└―儿1-1-1 [father] => 4 ) [3] => Array ( [id] => 5 [name] => └―儿1-2 [father] => 1 ) [4] => Array ( [id] => 6 [name] => └―儿1-3 [father] => 1 ) [5] => Array ( [id] => 2 [name] => 父2 [father] => 0 ) [6] => Array ( [id] => 7 [name] => └―儿2-1 [father] => 2 ) [7] => Array ( [id] => 12 [name] => └―└―儿2-1-1 [father] => 7 ) [8] => Array ( [id] => 8 [name] => └―儿2-1 [father] => 2 ) [9] => Array ( [id] => 3 [name] => 父3 [father] => 0 ) [10] => Array ( [id] => 9 [name] => └―儿3-1 [father] => 3 ) [11] => Array ( [id] => 10 [name] => └―└―儿3-1-1 [father] => 9 ) ) 父1<br>└―儿1-1<br>└―└―儿1-1-1<br>└―儿1-2<br>└―儿1-3<br>父2<br>└―儿2-1<br>└―└―儿2-1-1<br>└―儿2-1<br>父3<br>└―儿3-1<br>└―└―儿3-1-1<br>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => Array ( [id] => 1 [name] => 父1 [father] => 0 ) [1] => Array ( [id] => 4 [name] => └―儿1-1 [father] => 1 ) [2] => Array ( [id] => 11 [name] => └―└―儿1-1-1 [father] => 4 ) [3] => Array ( [id] => 5 [name] => └―儿1-2 [father] => 1 ) [4] => Array ( [id] => 6 [name] => └―儿1-3 [father] => 1 ) [5] => Array ( [id] => 2 [name] => 父2 [father] => 0 ) [6] => Array ( [id] => 7 [name] => └―儿2-1 [father] => 2 ) [7] => Array ( [id] => 12 [name] => └―└―儿2-1-1 [father] => 7 ) [8] => Array ( [id] => 8 [name] => └―儿2-1 [father] => 2 ) [9] => Array ( [id] => 3 [name] => 父3 [father] => 0 ) [10] => Array ( [id] => 9 [name] => └―儿3-1 [father] => 3 ) [11] => Array ( [id] => 10 [name] => └―└―儿3-1-1 [father] => 9 ) ) 父1<br>└―儿1-1<br>└―└―儿1-1-1<br>└―儿1-2<br>└―儿1-3<br>父2<br>└―儿2-1<br>└―└―儿2-1-1<br>└―儿2-1<br>父3<br>└―儿3-1<br>└―└―儿3-1-1<br>

preferences:
158.08 ms | 405 KiB | 202 Q