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run code in 150+ php & hhvm versions
Bugs & Features
<?php class A1 { public function rows() { $a = array(); $a[] = array('parent_id' => 0, 'category_id' => 7); $a[] = array('parent_id' => 0, 'category_id' => 8); $a[] = array('parent_id' => 0, 'category_id' => 9); $a[] = array('parent_id' => 7, 'category_id' => 10); $a[] = array('parent_id' => 7, 'category_id' => 11); $a[] = array('parent_id' => 8, 'category_id' => 12); $a[] = array('parent_id' => 10, 'category_id' => 13); 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']; } else { $categoryArray[$row['parent_id']][$row['category_id']] = $row['name']; } } print_r($categoryArray);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Array ( [0] => Array ( [7] => [8] => [9] => ) [7] => Array ( [10] => [11] => ) [8] => Array ( [12] => ) [10] => Array ( [13] => ) )
Output for 5.0.0 - 5.2.17
Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Notice: Undefined index: name in /in/9hhFO on line 25 Array ( [0] => Array ( [7] => [8] => [9] => ) [7] => Array ( [10] => [11] => ) [8] => Array ( [12] => ) [10] => Array ( [13] => ) )
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/9hhFO 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/9hhFO 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/9hhFO on line 4
Process exited with code 255.