Question

I have an array with filenames.

I want to check if the array have a file with extension ‘.txt’.

How can I do that?

in_array only checks for a specific value.

Answer 1

$iHaz = FALSE;

foreach ($arr as $item) {
    if (preg_match('/\.txt$/', $item)) {
        $iHaz = TRUE;
        break;
    }
}

Contrarily to other answers suggesting array_filter, I don’t return something. I just check if it exists in the array. Besides, this implementation is more efficient than array_filter because it breaks out of the loop once it’s found something.