3v4l.org

run code in 200+ PHP versions simultaneously
<?php $menu = array( array(1,3,'Wurm 1.1', 2, 10), array(2,6,'Vogel 2.1', 2, 30), array(3,0,'Tiger 1', 1, 10), array(4,6,'Hund 2.2', 2, 40), array(5,3,'Katze 1.2', 2, 11), array(6,0,'Pferd 2', 1, 20), array(7,1,'Baer 1.1.1', 3, 0), array(8,3,'Schwein 1.3', 2, 12), array(9,4,'Esel 2.2.1', 3, 0), ); // Algorithmus hier $result = array(); function flatten($arr) { global $result; foreach($arr as $r) { if(isset($r["r"])) { $x = $r["r"]; unset($r["r"]); $result[] = $r; flatten($x); } else { $result[] = $r; } } } $tmp = array(); foreach($menu as &$m) { $id = $m[0]; $ref = $m[1]; $m["r"] = array_filter($menu, function($item) use ($id) { return $item[1] == $id; }); if(sizeof($m["r"]) == 0) unset($m["r"]); if($ref == 0) { $tmp[] = $m; } } flatten($tmp); $target = array( array(3,0,'Tiger 1', 1, 10), array(1,3,'Wurm 1.1', 2, 10), array(7,1,'Baer 1.1.1', 3, 0), array(5,3,'Katze 1.2', 2, 11), array(8,3,'Schwein 1.3', 2, 12), array(6,0,'Pferd 2', 1, 20), array(2,6,'Vogel 2.1', 2, 30), array(4,6,'Hund 2.2', 2, 40), array(9,4,'Esel 2.2.1', 3, 0), ); var_dump($result == $target);
based on PTuRc
Output for 5.3.0 - 7.4.0
bool(true)
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/RuFPp on line 40
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/RuFPp on line 40
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/RuFPp on line 37
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/RuFPp on line 37
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/RuFPp on line 37
Process exited with code 255.