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Second code for header.php,it can use the first 100 byte as the description of the page.
<?php
if(is_single()) { ?>
<meta name="description" content="<?php echo trim(wp_title('',0)); ?>-<?php echo mb_strimwidth(strip_tags(apply_filters('the_content', $post->post_content)), 0, 100,"......","utf-8"); ?>" />
<?php }?>
following code can add rel=”nofollow” to external links,just copy the code to functions.php:
add_filter( 'the_content', 'sven_seo_wl');
function sven_seo_wl( $content ) {
$regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>";
if(preg_match_all("/$regexp/siU", $content, $matches, PREG_SET_ORDER)) {
if( !empty($matches) ) {
$srcUrl = get_option('siteurl');
for ($i=0; $i < count($matches); $i++)
{
$tag = $matches[$i][0];
$tag2 = $matches[$i][0];
$url = $matches[$i][0];
$noFollow = '';
$pattern = '/target\s*=\s*"\s*_blank\s*"/';
preg_match($pattern, $tag2, $match, PREG_OFFSET_CAPTURE);
if( count($match) < 1 )
$noFollow .= ' target="_blank" ';
$pattern = '/rel\s*=\s*"\s*[n|d]ofollow\s*"/';
preg_match($pattern, $tag2, $match, PREG_OFFSET_CAPTURE);
if( count($match) < 1 )
$noFollow .= ' rel="nofollow" ';
$pos = strpos($url,$srcUrl);
if ($pos === false) {
$tag = rtrim ($tag,'>');
$tag .= $noFollow.'>';
$content = str_replace($tag2,$tag,$content);
}
}
}
}
$content = str_replace(']]>', ']]>', $content);
return $content;
}the same,adding the code to functions.php:
add_filter('the_content', 'svenseo');
function svenseo($content) {
global $post;
$pattern ="/<a(.*?)href=('|\")(.*?).(bmp|gif|jpeg|jpg|png)('|\")(.*?)>/i";
$replacement = '<a$1href=$2$3.$4$5 alt="'.$post->post_title.'" title="'.$post->post_title.'"$6>';
$content = preg_replace($pattern, $replacement, $content);
return $content;
}That’s all.
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來(lái)自： 這是名字 > 《待分類(lèi)1》
