HTMLマークアップ:
<p>
<label for="custom-upload">Upload New Image:</label>
<input type="file" tabindex="3" name="custom-upload" id="custom-upload" />
</p>
<?php
/*Retrieving the image*/
$attachment = get_post_meta($postid, 'custom_image');
if($attachment[0]!='')
{
echo wp_get_attachment_link($attachment[0], 'thumbnail', false, false);
}
?>
画像のアップロード:
<?php
global $post; /*Global post object*/
$post_id = $post->ID; /*Geting current post id*/
$upload = $_FILES['upload']; /*Receive the uploaded image from form*/
add_custom_image($post_id, $upload); /*Call image uploader function*/
function add_custom_image($post_id, $upload)
{
$uploads = wp_upload_dir(); /*Get path of upload dir of wordpress*/
if (is_writable($uploads['path'])) /*Check if upload dir is writable*/
{
if ((!empty($upload['tmp_name']))) /*Check if uploaded image is not empty*/
{
if ($upload['tmp_name']) /*Check if image has been uploaded in temp directory*/
{
$file=handle_image_upload($upload); /*Call our custom function to ACTUALLY upload the image*/
$attachment = array /*Create attachment for our post*/
(
'post_mime_type' => $file['type'], /*Type of attachment*/
'post_parent' => $post_id, /*Post id*/
);
$aid = wp_insert_attachment($attachment, $file['file'], $post_id); /*Insert post attachment and return the attachment id*/
$a = wp_generate_attachment_metadata($aid, $file['file'] ); /*Generate metadata for new attacment*/
$prev_img = get_post_meta($post_id, 'custom_image'); /*Get previously uploaded image*/
if(is_array($prev_img))
{
if($prev_img[0] != '') /*If image exists*/
{
wp_delete_attachment($prev_img[0]); /*Delete previous image*/
}
}
update_post_meta($post_id, 'custom_image', $aid); /*Save the attachment id in meta data*/
if ( !is_wp_error($aid) )
{
wp_update_attachment_metadata($aid, wp_generate_attachment_metadata($aid, $file['file'] ) ); /*If there is no error, update the metadata of the newly uploaded image*/
}
}
}
else
{
echo 'Please upload the image.';
}
}
}
function handle_image_upload($upload)
{
global $post;
if (file_is_displayable_image( $upload['tmp_name'] )) /*Check if image*/
{
/*handle the uploaded file*/
$overrides = array('test_form' => false);
$file=wp_handle_upload($upload, $overrides);
}
return $file;
}
?>