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run code in 200+ php & hhvm versions
Bugs & Features
<?php $data = [ 'one' => '...', 'two' => [ 'three' => '...', 'four' => '...', 'five' => [ 'six' => '...', 'seven' => '...', ], ], ]; $fields = [ 'one', 'two' => [ 'four', 'five' => [ 'seven', ], ], ]; var_dump(filterRecursive($data, $fields)); function filterRecursive(array $data, array $fields) { foreach ( $data as $key => &$value ) { if ( is_array($fields[$key]) ) { $value = filterRecursive($value, $fields[$key]); } elseif ( !in_array($key, $fields) ) { unset($value); } } return $data; }
Output for 5.4.0 - 7.2.0
Notice: Undefined index: one in /in/Cust8 on line 30 Notice: Undefined index: three in /in/Cust8 on line 30 Notice: Undefined index: four in /in/Cust8 on line 30 Notice: Undefined index: six in /in/Cust8 on line 30 Notice: Undefined index: seven in /in/Cust8 on line 30 array(2) { ["one"]=> string(3) "..." ["two"]=> array(3) { ["three"]=> string(3) "..." ["four"]=> string(3) "..." ["five"]=> array(2) { ["six"]=> string(3) "..." ["seven"]=> string(3) "..." } } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Cust8 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Cust8 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Cust8 on line 3
Process exited with code 255.