如何对多个复选框组使用Checked()函数？如何正确清理该复选框组？

时间：2012-12-02 作者：Andrew

我正在使用underscores (_s) theme 要构建一个主题选项页面，我在页面上有一组复选框。在下面的示例中，为了简单起见，我只包含了2个。

我的问题是：

保存时，下面的checked（）函数中有什么使每个复选框保持选中状态？我必须对照DB中的值检查每个值是否正确

// register setting
register_setting(
    \'options\', // Options group
    \'theme_options\', // Database option
    \'theme_options_validate\' // The sanitization callback, see below
);

// add settings field
add_settings_field(
    \'post_sharing_networks\',
    \'Post Sharing Networks To Show\',
    \'settings_field_post_sharing_networks\', // callback below
    \'theme_options\',
    \'general\'
);

// set up the array
// more will be added later. 2 shown here for simplicity
function post_sharing_networks() {

    $post_sharing_networks = array(
        \'twitter\' => array(
            \'value\' => \'twitter\',
            \'label\' => \'Twitter\'
        ),
        \'facebook\' => array(
            \'value\' => \'facebook\',
            \'label\' => \'Facebook\'
        ),
    );

    return $post_sharing_networks;
}

// callback

function settings_field_post_sharing_networks() {

    $options = get_option( \'theme_options\' ); // get array of all the theme options

    $post_sharing_networks = $options[\'post_sharing_networks\']; // this will get array for just the post sharing networks

// eg
    /*
    array (size=2)
  \'twitter\' => string \'1\' (length=1)
  \'facebook\' => string \'1\' (length=1)
*/

    // builds the checkbox list form the post_sharing_networks() function
    foreach ( post_sharing_networks() as $network ) { ?>    
        <label> 
            <input type="checkbox" value="1" name="theme_options[post_sharing_networks][<?php echo esc_attr( $network[\'value\'] ); ?>]" <?php checked( /* what goes in here for this to work? */ ); ?> />

            <?php echo $network[\'value\']; ?>
        </label>

    <?php }
}


// sanitization callback
function theme_options_validate( $input ) {

    $output = array();

    // how do I properly sanitize the checkbox group?
        // it saves the checkboxes to DB fine currently but I think it can be improved
    $options = get_option( \'theme_options\' );

    foreach ( post_sharing_networks() as $network ) {

        if ( isset( $options[\'post_sharing_networks\'] ) )
            $output[\'post_sharing_networks\'] = $input[\'post_sharing_networks\'];

    }

    return apply_filters( \'theme_options_validate\', $output, $input );

}
这是保存到wp\\U选项表中时的外观

s:21:"post_sharing_networks";a:2:{s:7:"twitter";s:1:"1";s:8:"facebook";s:1:"1";}

1 个回复
最合适的回答,由SO网友:chrisguitarguy 整理而成

所以checked很容易理解。它比较前两个值。如果他们相等，就会吐出来checked="checked" 如果他们不相等，什么也不会发生。

<?php
$saved = \'on\';
$compare = \'on\'

// spits out checked="checked"
checked($saved, $compare);

$saved = \'off\';
// does nothing
checked($saved, $compare);
如何保存复选框取决于您。由于事物序列化的方式，我喜欢将“选中”值保存为on 和未选中的值为off.

因此，要进行消毒，请执行以下操作：

<?php
function wpse74685_clean_option($dirty)
{
    $clean = array(
        \'post_sharing_networks\'  => array(),
    );

    // $dirty[\'post_sharing_networks\'] will contain the array of
    // of your checkbox values, so check to make sure its there
    // then loop through.
    if(!empty($dirty[\'post_sharing_networks\']))
    {
        // if the box was checked, the value will be there
        // if not nothing will be there.
        foreach(post_sharing_networks() as $network)
            $clean[\'post_sharing_networks\'][$network[\'value\']] = !empty($dirty[\'post_sharing_networks\'][$network[\'value\']]) ? \'on\' : \'off\';
    }

    return $clean;
}
那么您对checked的调用将如下所示：

<input type="checkbox" value="1" 
       name="theme_options[post_sharing_networks][<?php echo esc_attr($network[\'value\']); ?>]"
       <?php checked($post_sharing_networks[$network[\'value\']], \'on\'); ?> />

结束
标签： theme-options   settings-api   sanitization   小码农  

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