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<?php $arr = [ 1=>['id'=>1,'name'=>'父1','father'=>NULL], 2=>['id'=>2,'name'=>'父2','father'=>NULL], 3=>['id'=>3,'name'=>'父3','father'=>NULL], 4=>['id'=>4,'name'=>'儿1-1','father'=>1], 5=>['id'=>5,'name'=>'儿1-2','father'=>1], 6=>['id'=>6,'name'=>'儿1-3','father'=>1], 7=>['id'=>7,'name'=>'儿2-1','father'=>2], 8=>['id'=>8,'name'=>'儿2-1','father'=>2], 9=>['id'=>9,'name'=>'儿3-1','father'=>3], 10=>['id'=>10,'name'=>'儿3-1-1','father'=>9], 11=>['id'=>11,'name'=>'儿1-1-1','father'=>4], 12=>['id'=>12,'name'=>'儿2-1-1','father'=>7], ]; function generateTree($items){ $tree = array(); foreach($items as $item){ if(isset($items[$item['father']])){ $items[$item['father']]['son'][$item['id']] = &$items[$item['id']]; }else{ $tree[] = &$items[$item['id']]; } } return $tree; } $tree = generateTree($arr); print_r($tree);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [0] => Array ( [id] => 1 [name] => 父1 [father] => [son] => Array ( [4] => Array ( [id] => 4 [name] => 儿1-1 [father] => 1 [son] => Array ( [11] => Array ( [id] => 11 [name] => 儿1-1-1 [father] => 4 ) ) ) [5] => Array ( [id] => 5 [name] => 儿1-2 [father] => 1 ) [6] => Array ( [id] => 6 [name] => 儿1-3 [father] => 1 ) ) ) [1] => Array ( [id] => 2 [name] => 父2 [father] => [son] => Array ( [7] => Array ( [id] => 7 [name] => 儿2-1 [father] => 2 [son] => Array ( [12] => Array ( [id] => 12 [name] => 儿2-1-1 [father] => 7 ) ) ) [8] => Array ( [id] => 8 [name] => 儿2-1 [father] => 2 ) ) ) [2] => Array ( [id] => 3 [name] => 父3 [father] => [son] => Array ( [9] => Array ( [id] => 9 [name] => 儿3-1 [father] => 3 [son] => Array ( [10] => Array ( [id] => 10 [name] => 儿3-1-1 [father] => 9 ) ) ) ) ) )
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] => [son] => Array ( [4] => Array ( [id] => 4 [name] => 儿1-1 [father] => 1 [son] => Array ( [11] => Array ( [id] => 11 [name] => 儿1-1-1 [father] => 4 ) ) ) [5] => Array ( [id] => 5 [name] => 儿1-2 [father] => 1 ) [6] => Array ( [id] => 6 [name] => 儿1-3 [father] => 1 ) ) ) [1] => Array ( [id] => 2 [name] => 父2 [father] => [son] => Array ( [7] => Array ( [id] => 7 [name] => 儿2-1 [father] => 2 [son] => Array ( [12] => Array ( [id] => 12 [name] => 儿2-1-1 [father] => 7 ) ) ) [8] => Array ( [id] => 8 [name] => 儿2-1 [father] => 2 ) ) ) [2] => Array ( [id] => 3 [name] => 父3 [father] => [son] => Array ( [9] => Array ( [id] => 9 [name] => 儿3-1 [father] => 3 [son] => Array ( [10] => Array ( [id] => 10 [name] => 儿3-1-1 [father] => 9 ) ) ) ) ) )

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