Online PHP editor | refs for VbFGY

<?php $_GET['sortBy'] = 'B'; function get_permalink() { return 'someurl'; } function get_terms($array) { return ['foo', 'bar', 'öle', 'can']; } function esc_html($string) { return htmlspecialchars($string, ENT_QUOTES); } function alpha_pagination() { $chars = array_fill_keys(range('A', 'Z'), false); foreach (get_terms(['taxonomy' => 'unknown', 'hide_empty' => true]) as $tax) { $chars[mb_strtoupper(mb_substr($tax, 0, 1))] = true; } ksort($chars); foreach ($chars as $char => $hasTerms) { $selected = ($_GET['sortBy'] ?? '_') === $char ? ' selected' : ''; if ($hasTerms) { printf( '<a class="button%s" href="%s?%s">%s</a>', $selected, get_permalink(), http_build_query(['sortby' => $char]), esc_html($char) ); } else { printf( '<span class="button disabled%s">%s</span>', $selected, esc_html($char) ); } echo "\n"; } } alpha_pagination();