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<?php function getTree(array $array) { $level = 0; $tree = []; $stack = [&$tree]; foreach($array as $item) { if($item['level']>$level) //expand stack for new items { //if there are child elements, add last to stack: $top = key($stack); if(count($stack[$top])) { end($stack[$top]); $stack[] = &$stack[$top][key($stack[$top])]; } //add ['children'] dim to top stack element end($stack); $top = key($stack); $stack[$top]['children'] = []; $stack[] = &$stack[$top]['children']; } while($item['level']<$level--) //pop till certain level { //two times: one for last pointer, one for ['children'] dim array_pop($stack); array_pop($stack); } //add item to stack top: end($stack); $stack[key($stack)][] = $item; $level = $item['level']; } return $tree; } $array = [ ['level'=>1, 'name' => 'Root #1'], ['level'=>1, 'name' => 'Root #2'], ['level'=>2, 'name' => 'subroot 2-1'], ['level'=>3, 'name' => '__subroot 2-1/1'], ['level'=>2, 'name' => 'subroot 2-2'], ['level'=>1, 'name' => 'Root #3'] ]; print_r(getTree($array));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14, 8.5.0
Array ( [children] => Array ( [0] => Array ( [level] => 1 [name] => Root #1 ) [1] => Array ( [level] => 1 [name] => Root #2 [children] => Array ( [0] => Array ( [level] => 2 [name] => subroot 2-1 [children] => Array ( [0] => Array ( [level] => 3 [name] => __subroot 2-1/1 ) ) ) [1] => Array ( [level] => 2 [name] => subroot 2-2 ) ) ) [2] => Array ( [level] => 1 [name] => Root #3 ) ) )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ofhSD on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/ofhSD on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/ofhSD on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/ofhSD on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ofhSD on line 3
Process exited with code 255.
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