A helper to handle with some HTML tags

Html_helper.php

<?php
/**
 * Builds HTML dropdowns in a simple way
 * @param array $array
 * @param bool $hasAll
 */
function mountDropdownHtml($array, $hasAll = false)
{
    if (!is_array($array)) {
        throw new Exception('Invalid argument: First argument must be an array');
    }
    $indexes = array_keys($array);
    $dropdown = "<select name='{$indexes[0]}'>";
    $all = ' selected ';
    $selected = '';
    foreach ($array[$indexes[0]] as $index => $value) {
        if ($value == ${$indexes[0]}) {
            $selected = ' selected ';
            $all = '';
        }
        $dropdown .= "<option value='{$index}' {$selected}>{$value}</option>";
    }
    if ($hasAll) {
        $dropdown .= "<option value='0' $all >All</option>";
    }
    $dropdown .= "</select>";
    
    return $dropdown;
}

?>