我正在使用此解决方案解决我的问题，为图像创建分类法，而不使用任何插件，如下所示：How to add upload field in a custom taxonomy?
这是我使用的代码：
function edit_form_tag( ) {
echo \' enctype="multipart/form-data"\';
}
add_action( \'category_term_edit_form_tag\' , \'edit_form_tag\' );
add_action( \'tax_projects_term_edit_form_tag\' , \'edit_form_tag\' );
add_action( \'tax_projects_term_edit_form_tag\' , \'edit_form_tag\' );
/** Add New Field To Category **/
function additional_category_fields( $term, $tax ) {
$uploadID = get_option( "{$tax}_image_{$term->term_id}" ); // Retrieve our Attachment ID from the Options Database Table
$feedback = get_option( "{$tax}_image_{$term->term_id}_feedback" ); // Retrieve any upload feedback from the Optoins Database Table
?>
<tr class="form-field">
<th scope="row" valign="top"><label for="meta-order"><?php _e( \'Category Image\' ); ?></label></th>
<td>
<div id="catImage">
<!-- Create a nonce to validate against -->
<input type="hidden" name="upload_meta_nonce" value="<?php echo wp_create_nonce( basename( __FILE__ ) ); ?>" />
<!-- Define our actual upload field -->
Please choose an image: <input type="file" name="_uploaded_file" value="" />
<?php
if( is_numeric( $uploadID ) ) : // IF our upload ID is actually numeric, proceed
/***
/* In this case we are pulling an image, if we are uploading
/* something such as a PDF we could use the built-in function
/* wp_get_attachment_url( $id );
/* codex.wordpress.org/Function_Reference/wp_get_attachment_url
***/
$imageArr = wp_get_attachment_image_src( $uploadID, \'medium\' ); // Get the URL of the medium sized image
$imageURL = $imageArr[0]; // wp_get_attachment_image_src() returns an array, index 0 is our URL
?>
<div id="uploaded_image">
<a href="post.php?post=<?php echo $uploadID; ?>&action=edit" target="_blank">Edit Image</a><br />
<!-- Display our image using the URL retrieved earlier -->
<a href="post.php?post=<?php echo $uploadID; ?>&action=edit" target="_blank"><img src="<?php echo $imageURL; ?>" /></a><br /><br />
</div>
<!-- IF we received feedback, something went wrong and we need to show that feedback. -->
<?php elseif( ! empty( $feedback ) ) : ?>
<p style="color:red;font-size:12px;font-weight;bold;font-style:italic;"><?php echo $feedback; ?></p>
<?php endif; ?>
</div>
<span class="description"><?php _e( \'Upload an appropriate image.\' ); ?></span>
<br />
<br />
<!-- This link is for our deletion process -->
<?php if( ! empty( $uploadID ) ) : ?>
<a href="javascript:void(0)" class="deleteImage" style="color:red;text-decoration:underline;">Delete</a>
<?php endif; ?>
</td>
</tr>
<?php
/** Since we\'ve shown the user the feedback they need to see, we can delete our option **/
delete_option( "{$tax}_image_{$term->term_id}_feedback" );
}
add_action( \'category_edit_form_fields\', \'additional_category_fields\', 10, 2 );
/** Save Category Meta **/
function save_category_fields( $term_id ) {
// Make sure that the nonce is set, taxonomy is set, and that our uploaded file is not empty
if(
isset( $_POST[\'upload_meta_nonce\'] ) && wp_verify_nonce( $_POST[\'upload_meta_nonce\'], basename( __FILE__ ) ) &&
isset( $_POST[\'taxonomy\'] ) && isset( $_FILES[\'_uploaded_file\'] ) && !empty( $_FILES[\'_uploaded_file\'] )
) {
$tax = $_POST[\'taxonomy\']; // Store our taxonomy, used for the option naming convention
$supportedTypes = array( \'image/gif\', \'image/jpeg\', \'image/png\' ); // Only accept image mime types. - List of mimetypes: http://en.wikipedia.org/wiki/Internet_media_type
$fileArray = wp_check_filetype( basename( $_FILES[\'_uploaded_file\'][\'name\'] ) ); // Get the mime type and extension.
$fileType = $fileArray[\'type\']; // Store our file type
// Verify that the type given is what we\'re expecting
if( in_array( $fileType, $supportedTypes ) ) {
$uploadStatus = wp_handle_upload( $_FILES[\'_uploaded_file\'], array( \'test_form\' => false ) ); // Let WordPress handle the upload
// Make sure that the file was uploaded correctly, without error
if( isset( $uploadStatus[\'file\'] ) ) {
require_once(ABSPATH . "wp-admin" . \'/includes/image.php\');
// Let\'s add the image to our media library so we get access to metadata
$imageID = wp_insert_attachment( array(
\'post_mime_type\' => $uploadStatus[\'type\'],
\'post_title\' => preg_replace( \'/\\.[^.]+$/\', \'\', basename( $uploadStatus[\'file\'] ) ),
\'post_content\' => \'\',
\'post_status\' => \'publish\'
),
$uploadStatus[\'file\']
);
// Generate our attachment metadata then update the file.
$attachmentData = wp_generate_attachment_metadata( $imageID, $uploadStatus[\'file\'] );
wp_update_attachment_metadata( $imageID, $attachmentData );
$existingImage = get_option( "{$tax}_image_{$term_id}" ); // IF a file already exists in this option, grab it
if( ! empty( $existingImage ) && is_numeric( $existingImage ) ) { // IF the option does exist, delete it.
wp_delete_attachment( $existingImage );
}
update_option( "{$tax}_image_{$term_id}", $imageID ); // Update our option with the new attachment ID
delete_option( "{$tax}_image_{$term_id}_feedback" ); // Just in case there\'s a feedback option, delete it - theoretically it shouldn\'t exist at this point.
}
else {
$uploadFeedback = \'There was a problem with your uploaded file. Contact Administrator.\'; // Something major went wrong, enable debugging
}
}
else {
$uploadFeedback = \'Image Files only: JPEG/JPG, GIF, PNG\'; // Wrong file type
}
// Update our Feedback Option
if( isset( $uploadFeedback ) ) {
update_option( "{$tax}_image_{$term_id}_feedback", $uploadFeedback );
}
}
}
add_action ( \'edited_category\', \'save_category_fields\');
我的问题很简单，我是php新手，我想知道如何输出这个值。我试过这样做：
<?php
$image_of = get_option(\'category_image_1\');
echo $image_of;
?>
我在步骤3中使用了“get\\u option（\'category\\u image\\u 1\'）”，正如上面的链接所说的那样，但我不知道在echo之前我必须输入什么。。有什么建议吗？
谢谢诺埃米
