1

I have an array 

$check = ['a', 'b', 'c'];

which I want to check against another array so that the values of $check should match the keys in $actual

$actual = ['a' => 'one', 'b' => 'two', 'c' => 'three'];

I can't use array_diff() === [] since array diff works on comparing the values and in this case I want to compare the values of one array against the keys in another.

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  • 1
    use array_keys first. Then - array_diff Commented May 26, 2016 at 8:35
  • try array_diff_key... Commented May 26, 2016 at 8:42
  • Actually what you want to do?? Commented May 26, 2016 at 8:42
  • @FrayneKonok and if read the question? Commented May 26, 2016 at 8:42
  • Check this: https://3v4l.org/t9Nun Commented May 26, 2016 at 8:44

1 Answer 1

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4

You can use array_keys();

<?php
$check = ['a', 'b', 'c'];
$actual = ['a' => 'one', 'b' => 'two', 'c' => 'three'];

$result = array_diff(array_keys($actual), $check);
print_r($result);

In this case array_diff returns a empty array because all keys are found

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