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@robneu
Created September 16, 2013 13:40
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WordPress SEO without a plugin is complete crap. Let's break it down one function at a time.
<?php
function basic_wp_seo() {
global $page, $paged, $post;
$default_keywords = 'wordpress, plugins, themes, design, dev, development, security, htaccess, apache, php, sql, html, css, jquery, javascript, tutorials'; // customize
$output = '';
// description
$seo_desc = get_post_meta($post->ID, 'mm_seo_desc', true);
$description = get_bloginfo('description', 'display');
$pagedata = get_post($post->ID);
if (is_singular()) {
if (!empty($seo_desc)) {
$content = $seo_desc;
} else if (!empty($pagedata)) {
$content = apply_filters('the_excerpt_rss', $pagedata->post_content);
$content = substr(trim(strip_tags($content)), 0, 155);
$content = preg_replace('#\n#', ' ', $content);
$content = preg_replace('#\s{2,}#', ' ', $content);
$content = trim($content);
}
} else {
$content = $description;
}
$output .= '<meta name="description" content="' . esc_attr($content) . '">' . "\n";
// keywords
$keys = get_post_meta($post->ID, 'mm_seo_keywords', true);
$cats = get_the_category();
$tags = get_the_tags();
if (empty($keys)) {
if (!empty($cats)) foreach($cats as $cat) $keys .= $cat->name . ', ';
if (!empty($tags)) foreach($tags as $tag) $keys .= $tag->name . ', ';
$keys .= $default_keywords;
}
$output .= "\t\t" . '<meta name="keywords" content="' . esc_attr($keys) . '">' . "\n";
// robots
if (is_category() || is_tag()) {
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
if ($paged > 1) {
$output .= "\t\t" . '<meta name="robots" content="noindex,follow">' . "\n";
} else {
$output .= "\t\t" . '<meta name="robots" content="index,follow">' . "\n";
}
} else if (is_home() || is_singular()) {
$output .= "\t\t" . '<meta name="robots" content="index,follow">' . "\n";
} else {
$output .= "\t\t" . '<meta name="robots" content="noindex,follow">' . "\n";
}
// title
$title_custom = get_post_meta($post->ID, 'mm_seo_title', true);
$url = ltrim(esc_url($_SERVER['REQUEST_URI']), '/');
$name = get_bloginfo('name', 'display');
$title = trim(wp_title('', false));
$cat = single_cat_title('', false);
$tag = single_tag_title('', false);
$search = get_search_query();
if (!empty($title_custom)) $title = $title_custom;
if ($paged >= 2 || $page >= 2) $page_number = ' | ' . sprintf('Page %s', max($paged, $page));
else $page_number = '';
if (is_home() || is_front_page()) $seo_title = $name . ' | ' . $description;
elseif (is_singular()) $seo_title = $title . ' | ' . $name;
elseif (is_tag()) $seo_title = 'Tag Archive: ' . $tag . ' | ' . $name;
elseif (is_category()) $seo_title = 'Category Archive: ' . $cat . ' | ' . $name;
elseif (is_archive()) $seo_title = 'Archive: ' . $title . ' | ' . $name;
elseif (is_search()) $seo_title = 'Search: ' . $search . ' | ' . $name;
elseif (is_404()) $seo_title = '404 - Not Found: ' . $url . ' | ' . $name;
else $seo_title = $name . ' | ' . $description;
$output .= "\t\t" . '<title>' . esc_attr($seo_title . $page_number) . '</title>' . "\n";
return $output;
}
@llity
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llity commented Jan 5, 2016

Maybe need update it for all language.

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