I have two arrays: $values and $availableKeys. I want to throw an exception if $values contains not allowed keys. At the moment I am running this code.
foreach ($values as $key => $value) {
if (!in_array($key, $availableKeys)) {
throw new RuntimeException(
'Not allowed key'
);
}
}
Exists a better way to validate an array? The question Validate PHP Array Key>Value is not responding to my question.
if (array_diff_key($values, array_flip($availableKeys))) {
throw new RuntimeException(..);
}
i can only say that test, that key is present in array, is more faster. So make array $availableKeys not [key1, key2...] but [key1=>1, key2=>1...]. ie, flip your current array
foreach ($values as $key => $value) {
if (!isset($availableKeys[$key])) {
throw new RuntimeException(
'Not allowed key'
);
}
}
You could use array_diff() to search for unallowed keys:
$allowedKeys = array("a","b","c");
$test = array("a" => "asdf", "c" => "asdf", "d" => "asdf");
$notAllowedKeys = array_diff(array_keys($test), $allowedKeys);
if($notAllowedKeys) {
print "One or more keys are not allowed";
print_r($notAllowedKeys);
}
Live example: http://3v4l.org/hi2sP
empty for variables which are guaranteed to exist. if ($notAllowedKeys) does exactly the same thing without needlessly suppressing error reporting.