下面的代码向附件编辑器添加了一个自定义输入字段。如何将文本输入转换为复选框，并在加载和保存时获取/设置复选框的值？
注："input" => "checkbox" 不起作用：(
function image_attachment_fields_to_edit($form_fields, $post) {
$form_fields["imageLinksTo"] = array(
"label" => __("Image Links To"),
"input" => "text",
"value" => get_post_meta($post->ID, "_imageLinksTo", true)
);
return $form_fields;
}
function image_attachment_fields_to_save($post, $attachment) {
if( isset($attachment[\'imageLinksTo\']) ){
update_post_meta($post[\'ID\'], \'_imageLinksTo\', $attachment[\'imageLinksTo\']);
}
return $post;
}
add_filter("attachment_fields_to_edit", "image_attachment_fields_to_edit", null, 2);
add_filter("attachment_fields_to_save", "image_attachment_fields_to_save", null, 2);
最合适的回答,由SO网友:prettyboymp 整理而成
将“输入”设置为“html”，并写出输入的html：
function filter_attachment_fields_to_edit( $form_fields, $post ) {
$foo = (bool) get_post_meta($post->ID, \'foo\', true);
$form_fields[\'foo\'] = array(
\'label\' => \'Is Foo\',
\'input\' => \'html\',
\'html\' => \'<label for="attachments-\'.$post->ID.\'-foo"> \'.
\'<input type="checkbox" id="attachments-\'.$post->ID.\'-foo" name="attachments[\'.$post->ID.\'][foo]" value="1"\'.($foo ? \' checked="checked"\' : \'\').\' /> Yes</label> \',
\'value\' => $foo,
\'helps\' => \'Check for yes\'
);
return $form_fields;
}
保存的工作方式与上面所做的一样，但您是在对照复选框值进行检查，因此需要在isset（）时更新为true，否则更新为false。
SO网友:Mathieu Clerte
下面是添加IsLogo复选框的完整块，包括保存：
function attachment_fields_to_edit_islogoimage( $form_fields, $post ) {
$islogo = (bool) get_post_meta($post->ID, \'_islogo\', true);
$checked = ($islogo) ? \'checked\' : \'\';
$form_fields[\'islogo\'] = array(
\'label\' => \'Logo Image ?\',
\'input\' => \'html\',
\'html\' => "<input type=\'checkbox\' {$checked} name=\'attachments[{$post->ID}][islogo]\' id=\'attachments[{$post->ID}][islogo]\' />",
\'value\' => $islogo,
\'helps\' => \'Should this image appear as a proposal Logo ?\'
);
return $form_fields;
}
add_filter( \'attachment_fields_to_edit\', \'attachment_fields_to_edit_islogoimage\', null, 2 );
function attachment_fields_to_save_islogoimage($post, $attachment) {
$islogo = ($attachment[\'islogo\'] == \'on\') ? \'1\' : \'0\';
update_post_meta($post[\'ID\'], \'_islogo\', $islogo);
return $post;
}
add_filter( \'attachment_fields_to_save\', \'attachment_fields_to_save_islogoimage\', null, 2 );
我的2美分。
