array_key_exists using array for search parameter

[proggR]

I'm just wondering if there is a function like array_key_exists that could take an array as the search parameter and check that all keys exist. It would be easy enough to code if I need to but I was hoping it would already exist. All wanted to use it for is a really quick form check to make sure that all the expected values were POSTed before I actually start filtering and validating individual fields.

 

Thanks in advance for any recommendations

[requinix]

No function that I know of.

 

You could do it with a rather long one-liner, but a simple loop would be easier to deal with.

[mikesta707]

I'm pretty positive no such function exists, but as you said, using the built in array_key_exists() function iteratively or recursively would be easy enough to do what you want

[joel24]

you could use array_diff()...

i.e.

$array1 = array("green", "yellow", "red");
$array2 = array("green", "yellow", "blue", "red");
$result = array_diff($array1, $array2);

if (empty($result)) {
    echo "found";
} else {
    echo "not found";
}

[mikesta707]

well since he's trying to see if a set of array keys exists in an array, he'd probably need to use array_diff in combination with array keys.

 

like

$subjectArray = array("array we are looking through", ...);
$searchKeys = array ("keys you are looking for", ...);
$result = array_diff($searchKeys, array_keys($subjectArray));

if (empty($result)){
//all the keys in searchKeys are defined in the subjectArray
}

[joel24]

whoops, misread that.

substitute array_diff() with array_diff_key()

[proggR]

Awesome. Thanks for that