Question

I have a php code like this

$output .= '<div>';
$output .= sprintf('<input type="text" name="%s"/>', $field['input_name']);
$output .= '</div>';
return $output;

These input fields can be duplicated. So $field['input_name'] is a multidimensional array

So it looks like this

name[first_name][1][1]

If I duplicate that field it looks like this

name[first_name][2][1]

I would like to display a button if the name field looks like name[username][][]

I’ve tried like this. But its not working.

if ($field['input_name'] == 'name[username][][]') {
    $output .= '<input type="submit" value="Testing">';
}

Can someone give me the correct syntax?

Thanks

Answer 1

You need to implement a foreach() loop or some function, that searches your array. Your best friend in this case is RecursiveIteratorIterator.

function searchArrayValueByKey(array $array, $needle) {

    foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($array)) as $key => $value) {
        if ($key === $needle)
        return $value;
    }
    return false;
}

Implementation (example):

if (searchArrayValueByKey($name['username'], $field['input_name']) {
    $output .= '<input type="submit" value="Testing">';
}

If you handle with with big data arrays, this solution might be slow.