wordpress代码常用函数整理

<?php
//浏览量设置
//获取浏览数-参数文章ID
function getPostViews($postID) {
    //字段名称
    $count_key = 'post_views_count';
    //获取字段值即浏览次数
    $count = get_post_meta($postID, $count_key, true);
    //如果为空设置为0
    if ($count == '') {
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, '0');
        return "0";
    }
    return $count;
}
//设置浏览数-参数文章ID
function setPostViews($postID) {
    //字段名称
    $count_key = 'post_views_count';
    //先获取获取字段值即浏览次数
    $count = get_post_meta($postID, $count_key, true);
    //如果为空就设为0
    if ($count == '') {
        $count = 0;
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, '0');
    } else {
        //如果不为空，加1，更新数据
        $count++;
        update_post_meta($postID, $count_key, $count);
    }
}

//浏览量设置
?>

// 获取文章第一张缩略图
function catch_that_image() {
    global $post;
    $first_img = '';
    ob_start();
    ob_end_clean();
    $output = preg_match_all('/<img*.+src=[\'"]([^\'"]+)[\'"].*>/iU', wp_unslash($post->post_content), $matches);
    if(empty($output)){
        $first_img = "/wp-content/themes/h/images/default.png";
    }else {
        $first_img = $matches [1][0];
    }
    return $first_img;
}