详解WordPress开发中过滤属性以及Sql语句的函数使用,
详解WordPress开发中过滤属性以及Sql语句的函数使用,
esc_attr()(过滤属性)
一般在写 Html 代码的标签属性的时候会是下边的格式:
<input type="text" name="rep" value="rep_value" />
那如果 value 属性是动态输出的呢?
<input type="text" name="rep" value="<?php echo get_option( 'rep_value' ); ?>" />
但是,如果动态输出的属性里有双引号、尖括号等特殊字符,Html 代码就会被打乱,这时就可以使用 esc_attr() 函数对输出的属性进行转义。
使用方法
esc_attr( $text );
参数
$text (字符串)(必须)要转义的字符串。 默认值:None
返回值
返回转义后的字符串。
例子
<input type="text" name="rep" value="<?php echo esc_attr( get_option( 'rep_value' ) ); ?>" />
其它
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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