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<?php function getTree($treeByParent, $treeByCat, $id, $listed = []) { $gTree = []; $gTree[] = $treeByCat[ $id ]; if ( count($treeByParent[ $id ]) > 0) { foreach ($treeByParent[ $id ] as $cat) $gTree[] = $cat; } if ( count($treeByParent[$id]) > 0 ) getTree($treeByParent, $treeByCat, $treeByCat[ $id ]); return $gTree; } $treeByParent = array( 0 => array(1, 2), 1 => array(3, 7), 3 => array(4), 4 => array(5) ); $treeByCat = array( 1 => 0, 2 => 0, 3 => 1, 7 => 1, 4 => 3, 5 => 4 ); print_r( getTree($treeByParent, $treeByCat, 4) );
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key 0 in /in/dbZ8m on line 7 Warning: Undefined array key 0 in /in/dbZ8m on line 15 Warning: Undefined array key "" in /in/dbZ8m on line 7 Warning: Undefined array key "" in /in/dbZ8m on line 9 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/dbZ8m:9 Stack trace: #0 /in/dbZ8m(15): getTree(Array, Array, NULL) #1 /in/dbZ8m(15): getTree(Array, Array, 0) #2 /in/dbZ8m(15): getTree(Array, Array, 1) #3 /in/dbZ8m(15): getTree(Array, Array, 3) #4 /in/dbZ8m(42): getTree(Array, Array, 4) #5 {main} thrown in /in/dbZ8m on line 9
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Warning: Undefined array key 0 in /in/dbZ8m on line 7 Warning: Undefined array key 0 in /in/dbZ8m on line 15 Warning: Undefined array key "" in /in/dbZ8m on line 7 Warning: Undefined array key "" in /in/dbZ8m on line 9 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, null given in /in/dbZ8m:9 Stack trace: #0 /in/dbZ8m(15): getTree(Array, Array, NULL) #1 /in/dbZ8m(15): getTree(Array, Array, 0) #2 /in/dbZ8m(15): getTree(Array, Array, 1) #3 /in/dbZ8m(15): getTree(Array, Array, 3) #4 /in/dbZ8m(42): getTree(Array, Array, 4) #5 {main} thrown in /in/dbZ8m on line 9
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 0 in /in/dbZ8m on line 7 Notice: Undefined offset: 0 in /in/dbZ8m on line 15 Notice: Undefined index: in /in/dbZ8m on line 7 Notice: Undefined index: in /in/dbZ8m on line 9 Warning: count(): Parameter must be an array or an object that implements Countable in /in/dbZ8m on line 9 Notice: Undefined index: in /in/dbZ8m on line 15 Warning: count(): Parameter must be an array or an object that implements Countable in /in/dbZ8m on line 15 Array ( [0] => 3 [1] => 5 )
Output for 7.3.32 - 7.3.33
Warning: count(): Parameter must be an array or an object that implements Countable in /in/dbZ8m on line 9 Warning: count(): Parameter must be an array or an object that implements Countable in /in/dbZ8m on line 15 Array ( [0] => 3 [1] => 5 )
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Undefined offset: 0 in /in/dbZ8m on line 7 Notice: Undefined offset: 0 in /in/dbZ8m on line 15 Notice: Undefined index: in /in/dbZ8m on line 7 Notice: Undefined index: in /in/dbZ8m on line 9 Notice: Undefined index: in /in/dbZ8m on line 15 Array ( [0] => 3 [1] => 5 )
Output for 4.4.2 - 4.4.9, 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/dbZ8m 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/dbZ8m on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/dbZ8m on line 3
Process exited with code 255.
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