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";}
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\'); ?> />
