WordPressにおけるファイルアップロード処理

wp_upload_process.md

#WordPressにおけるファイルアップロード処理

functions.php

<?php
// Check that the nonce is valid, and the user can edit this post.
if (
	isset( $_POST['my_image_upload_nonce'], $_POST['post_id'] )
	&& wp_verify_nonce( $_POST['my_image_upload_nonce'], 'my_image_upload' )
	&& current_user_can( 'edit_post', $_POST['post_id'] )
) {
	// The nonce was valid and the user has the capabilities, it is safe to continue.

	// These files need to be included as dependencies when on the front end.
	require_once( ABSPATH . 'wp-admin/includes/image.php' );
	require_once( ABSPATH . 'wp-admin/includes/file.php' );
	require_once( ABSPATH . 'wp-admin/includes/media.php' );

	// Let WordPress handle the upload.
	// Remember, 'my_image_upload' is the name of our file input in our form above.
	$attachment_id = media_handle_upload( 'my_image_upload', $_POST['post_id'] );

	if ( is_wp_error( $attachment_id ) ) {
		// There was an error uploading the image.
	} else {
		// The image was uploaded successfully!
	}

} else {

	// The security check failed, maybe show the user an error.
}

index.html

<form id="featured_upload" method="post" action="#" enctype="multipart/form-data">
	<input type="file" name="my_image_upload" id="my_image_upload"  multiple="false" />
	<input type="hidden" name="post_id" id="post_id" value="55" />
	<?php wp_nonce_field( 'my_image_upload', 'my_image_upload_nonce' ); ?>
	<input id="submit_my_image_upload" name="submit_my_image_upload" type="submit" value="Upload" />
</form>