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run code in 150+ php & hhvm versions
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<?php $custom_fields = [ 'foo' => '17', 'bar' => '17', ]; $time_intervals = ['day', 'month', 'year', 'hour', 'minute', 'period']; $data = [ 'fooday' => '17', 'foomonth' => 'March', 'name' => 'Chris' ]; function array_string_multiply($array1, $array2) { $values = []; foreach ($array1 as $field) { $values += array_map(function ($interval) use ($field) { return $field . $interval; }, $array2); } return $values; } foreach (array_string_multiply(array_keys($custom_fields), $time_intervals) as $key) { var_dump($key); } foreach (array_keys($custom_fields) as $name) { foreach ($time_intervals as $interval_name) { // ; } } var_dump($data); // Result should be array that only contains $data['name'] = 'Chris'
based on aB43k
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(6) "fooday" string(8) "foomonth" string(7) "fooyear" string(7) "foohour" string(9) "foominute" string(9) "fooperiod" array(3) { ["fooday"]=> string(2) "17" ["foomonth"]=> string(5) "March" ["name"]=> string(5) "Chris" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/mCI6M on line 2
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/mCI6M on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/mCI6M on line 2
Process exited with code 255.