代码实现文章缩略图的方法

https://www.91wordpress.com/703.html

cd /home/wwwroot/default/vermaxcn/wp-content/themes/flatsome/
vi functions.php

add_theme_support( 'post-thumbnails' );
function post_thumbnail( $width = 255,$height = 130 ){
    global $post;
    if( has_post_thumbnail() ){
        $timthumb_src = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID),'full');
        $post_timthumb = '<img src="'.get_bloginfo("template_url").'/timthumb.php?src='.$timthumb_src[0].'&amp;h='.$height.'&amp;w='.$width.'&amp;zc=1" alt="'.$post->post_title.'" class="thumb" title="'.get_the_title().'"/>';
        echo $post_timthumb;
    } else {
        $content = $post->post_content;
        $defaltthubmnail = sapphire('default-thumb') ? sapphire('default-thumb') : get_template_directory_uri().'/img/no-thumb.png';
        preg_match_all('/<img.*?(?: |\\t|\\r|\\n)?src=[\'"]?(.+?)[\'"]?(?:(?: |\\t|\\r|\\n)+.*?)?>/sim', $content, $strResult, PREG_PATTERN_ORDER);
        $n = count($strResult[1]);
        if($n > 0){
            echo '<img src="'.get_bloginfo("template_url").'/timthumb.php?w='.$width.'&amp;h='.$height.'&amp;src='.$strResult[1][0].'" title="'.get_the_title().'" alt="'.get_the_title().'"/>';
        } else {
            echo '<img src="'.get_bloginfo("template_url").'/timthumb.php?w='.$width.'&amp;h='.$height.'&amp;src='.$defaltthubmnail.'" title="'.get_the_title().'" alt="'.get_the_title().'"/>';
        }
    }
}

cp /home/wwwroot/default/webcode/timthumb.php /home/wwwroot/default/vermaxcn/wp-content/themes/flatsome/timthumb.php

<?php post_thumbnail(145,145) ?>