详解WordPress中过滤链接与过滤SQL语句的方法,
esc_url()(过滤链接)
很多 URL 会有一些小错误,用 esc_url() 函数可以屏蔽或者修正这些错误,并且可以拒绝不安全的协议。
esc_url() 函数的工作内容:
默认拒绝不是下面协议的 URL:defaulting to http、https、ftp、ftps、mailto、news、irc、gopher、nntp、feed 和 telnet
删除无效字符和危险的字符
将字符转换成 HTML 实体字符
使用方法
esc_url( $url, $protocols, $_context );
参数
$url
(字符串)(必须)要被过滤的 URL.
默认值:None
$protocols
(数组)(可选)可以接收协议的数组,如果没有设置,则默认为:defaulting to http、https、ftp、ftps、mailto、news、irc、gopher、nntp、feed 和 telnet.
默认值:None
$_context
(字符串)(可选)如何返回 URL.
默认值:(字符串)display
返回值
(字符串)返回过滤后的链接。
例子
<?php echo esc_url( 'www.endskin.com' );//输出:http://www.endskin.com ?>
更多
此函数位于:wp-includes/formatting.php
esc_sql()(过滤 Sql 语句)
esc_sql() 用来过滤准备添加到 Sql 语句里边的字符串,防止 Sql 注入和 Sql 语句被数据干扰出现异常。
用法
esc_sql( $data );
参数
$data
(字符串)(必须)要过滤的字符串。
默认值:None
返回值
(字符串)返回过滤后的字符串,可以直接添加到 Sql 语句里。
例子
$name = esc_sql( $name ); $status = esc_sql( $status ); $wpdb->get_var( "SELECT something FROM table WHERE foo = '$name' and status = '$status'" );
更多
此函数位于:wp-includes/formatting.php
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