WordPress 如何在前端自定义上传图片文件到媒体库

<?php

// WordPress environment

require( dirname(__FILE__) . '/../../../wp-load.php' );

$wordpress_upload_dir = wp_upload_dir();

// $wordpress_upload_dir['path'] is the full server path to wp-content/uploads/2020/11, for multisite works good as well

// $wordpress_upload_dir['url'] the absolute URL to the same folder, actually we do not need it, just to show the link to file

$i = 1; // number of tries when the file with the same name is already exists

$profilepicture = $_FILES['profilepicture'];

$new_file_path = $wordpress_upload_dir['path'] . '/' . $profilepicture['name'];

$new_file_mime = mime_content_type( $profilepicture['tmp_name'] );

if( empty( $profilepicture ) )

	die( 'File is not selected.' );

if( $profilepicture['error'] )

	die( $profilepicture['error'] );

if( $profilepicture['size'] > wp_max_upload_size() )

	die( 'It is too large than expected.' );

if( !in_array( $new_file_mime, get_allowed_mime_types() ) )

	die( 'WordPress doesn\'t allow this type of uploads.' );

while( file_exists( $new_file_path ) ) {

	$i++;

	$new_file_path = $wordpress_upload_dir['path'] . '/' . $i . '_' . $profilepicture['name'];

}

// looks like everything is OK

if( move_uploaded_file( $profilepicture['tmp_name'], $new_file_path ) ) {

	$upload_id = wp_insert_attachment( array(

		'guid'           => $new_file_path, 

		'post_mime_type' => $new_file_mime,

		'post_title'     => preg_replace( '/\.[^.]+$/', '', $profilepicture['name'] ),

		'post_content'   => '',

		'post_status'    => 'inherit'

	), $new_file_path );

	// wp_generate_attachment_metadata() won't work if you do not include this file

	require_once( ABSPATH . 'wp-admin/includes/image.php' );

	// Generate and save the attachment metas into the database

	wp_update_attachment_metadata( $upload_id, wp_generate_attachment_metadata( $upload_id, $new_file_path ) );

	// Show the uploaded file in browser

	wp_redirect( $wordpress_upload_dir['url'] . '/' . basename( $new_file_path ) );

}