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run code in 150+ php & hhvm versions
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<?php class A1 { public function rows() { $a = array(); $a[] = array('parent_id' => 10, 'category_id' => 13, 'name' => 'id13'); $a[] = array('parent_id' => 8, 'category_id' => 12, 'name' => 'id12'); $a[] = array('parent_id' => 7, 'category_id' => 11, 'name' => 'id11'); $a[] = array('parent_id' => 7, 'category_id' => 10, 'name' => 'id10'); $a[] = array('parent_id' => 0, 'category_id' => 9, 'name' => 'id9'); $a[] = array('parent_id' => 0, 'category_id' => 8, 'name' => 'id8'); $a[] = array('parent_id' => 0, 'category_id' => 7, 'name' => 'id7'); return $a; } } $query = new A1; $categoryArray = array(); foreach($query->rows() as $row) { if(isset($categoryArray[$row['category_id']])) { $categoryArray[$row['parent_id']][$row['category_id']] = $categoryArray[$row['category_id']]; unset($categoryArray[$row['category_id']]); } else { $categoryArray[$row['parent_id']][$row['category_id']] = $row['name']; } } echo "first stage \n"; print_r($categoryArray); // second stage echo "\n\n"; getCategory($categoryArray); function getCategory($array){ foreach($array as $row){ if(is_array($row)) { echo('<li>'.$row.'<ul>'); getCategory($row); echo('</ul></li>'); } else { echo('<li>'.$row.'</li>'); } } }
Output for 5.4.0 - 7.1.0
first stage Array ( [0] => Array ( [9] => id9 [8] => Array ( [12] => id12 ) [7] => Array ( [11] => id11 [10] => Array ( [13] => id13 ) ) ) ) Notice: Array to string conversion in /in/HARk6 on line 41 <li>Array<ul><li>id9</li> Notice: Array to string conversion in /in/HARk6 on line 41 <li>Array<ul><li>id12</li></ul></li> Notice: Array to string conversion in /in/HARk6 on line 41 <li>Array<ul><li>id11</li> Notice: Array to string conversion in /in/HARk6 on line 41 <li>Array<ul><li>id13</li></ul></li></ul></li></ul></li>
Output for 5.0.0 - 5.3.29
first stage Array ( [0] => Array ( [9] => id9 [8] => Array ( [12] => id12 ) [7] => Array ( [11] => id11 [10] => Array ( [13] => id13 ) ) ) ) <li>Array<ul><li>id9</li><li>Array<ul><li>id12</li></ul></li><li>Array<ul><li>id11</li><li>Array<ul><li>id13</li></ul></li></ul></li></ul></li>
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/HARk6 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/HARk6 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/HARk6 on line 4
Process exited with code 255.