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详解WordPress开发中过滤属性以及Sql语句的函数使用,
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详解WordPress开发中过滤属性以及Sql语句的函数使用,

Jun 13, 2016 am 08:49 AM
wordpress filter

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" />
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那如果 value 属性是动态输出的呢?

<input type="text" name="rep" value="<&#63;php echo get_option( 'rep_value' ); &#63;>" />
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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 );
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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="<&#63;php echo esc_attr( get_option( 'rep_value' ) ); &#63;>" />
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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 );
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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'" );

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更多

此函数位于:wp-includes/formatting.php


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