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How to solve the problems that arise when using wordpress's $wpdb class to read mysql database and do ajax
How to solve the problems that arise when using wordpress's $wpdb class to read mysql database and do ajax
这篇文章主要介绍了使用wordpress的$wpdb类读mysql数据库做ajax时出现的问题该如何解决的相关资料,需要的朋友可以参考下
无聊做了个www.jiazhuangma.com，技术不过关写不好后台，就想直接读wordpress里的数据。做ajax读后台数据时在网上随便搜了一段代码使用wordpress $wpdb类读mysql数据库，就是这么一随便，搜到了别人的去头去尾的code，开始了我的改错之旅。
主要问题有：
1，non-object
2，json中汉字，/被转码
3，chrome可以正常访问php文件，ie显示http 404，ajax时头部显示404，但是响应正文正确，是我想要的json。
先贴上网上搜到的代码：
<?php global $wpdb; $a = $wpdb->get_results(“SELECT ID,post_title FROM wp_posts ″); echo json_encode($a ); ?>
这时会报错，non-object；
网上有人说可以添加require_once(‘wp-blog-header.php');那么恭喜你中奖了，你会发现chrome可以正常访问php文件，ie显示http 404，ajax时头部显示404，但是响应正文正确。
修改为require_once(‘wp-config.php');后正常，
这时得到的json是转码后的需要将echo json_encode($a );
修改为echo str_replace(“\\/”, “/”, json_encode($a,JSON_UNESCAPED_UNICODE ));结果才正确
最终结果：
<?php require_once(‘wp-config.php'); global $wpdb; $a = $wpdb->get_results(“SELECT wp_posts.ID,wp_posts.post_title,wp_posts.guid FROM wp_posts inner join wp_term_relationships on wp_term_relationships.object_id=wp_posts.ID where wp_term_relationships.term_taxonomy_id=3 ORDER BY wp_term_relationships.object_id DESC LIMIT 5″); echo str_replace(“\\/”, “/”, json_encode($a,JSON_UNESCAPED_UNICODE )); ?>
上面是我整理给大家的，希望今后会对大家有帮助。
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