Question

I have this array structure, it is stored in a variable $xxx

Array
(
    [xyz] => Array
        (
            [1] => 3
            [0] => s
        )

    [d2s] => Array
        (
            [a] => 96
            [d] => 4

         )
...
)

It is a long array, and I don’t want to out put the whole thing, how do print only the first 5 (1st dimension) values along with the 2nd dimension values?

Secondly, if I want this array to contain only alphabets in the FIRST dimension, how do I either delete values that don’t match that requirement or retain values that match the requirement? so that my final array would be

Array
(
    [xyz] => Array
        (
            [1] => 3
            [0] => s
        )

...
)

TIA

Answer 1

To output only the first 5 elements, use array_slice:

array_slice($arr, 0, 5)

To remove any elements whose index contains non-alpha characters.

foreach ($arr AS $index => $value) {
        // Remove the element if the index contains non-alpha characters
        if (preg_match('/[^A-Za-z]/', $index))
                unset($arr[$index]);
}

Check it out in action.