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<?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 => $hasTerms) { printf( '<%1$s class="button%2$s%3$s">%4$s</%1$s>' . "\n", $hasTerms ? 'a' : 'span', // %1$s ($_GET['sortBy'] ?? '_') === $char ? ' selected' : '', // %2$s $hasTerms ? '" href="' . get_permalink() . '?' . http_build_query(['sortby' => $char]) : ' disable', // %3$s esc_html($char) // %4$s ); } } alpha_pagination();
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
<span class="button disable">A</span> <a class="button selected" href="someurl?sortby=B">B</a> <a class="button" href="someurl?sortby=C">C</a> <span class="button disable">D</span> <span class="button disable">E</span> <a class="button" href="someurl?sortby=F">F</a> <span class="button disable">G</span> <span class="button disable">H</span> <span class="button disable">I</span> <span class="button disable">J</span> <span class="button disable">K</span> <span class="button disable">L</span> <span class="button disable">M</span> <span class="button disable">N</span> <span class="button disable">O</span> <span class="button disable">P</span> <span class="button disable">Q</span> <span class="button disable">R</span> <span class="button disable">S</span> <span class="button disable">T</span> <span class="button disable">U</span> <span class="button disable">V</span> <span class="button disable">W</span> <span class="button disable">X</span> <span class="button disable">Y</span> <span class="button disable">Z</span> <a class="button" href="someurl?sortby=%C3%96">Ö</a>

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