WordPress开发教程:优化用户注册体验(自定义密码)
目前wordpress网站几乎都是使用Gravatar全球通头像来关联用户头像的,但是由于Gravatar的服…
目前wordpress网站几乎都是使用Gravatar全球通头像来关联用户头像的,但是由于Gravatar的服务器是在国外,国内经常由于某些XXX原因而连接不上,今天就来教大家使用代码将Gravatar头像半本地化,那么什么是半本地化呢?也就是通过用户的邮箱判断用户是否拥有Gravatar头像,如果拥有则使用Gravatar头像,当用户拥有本地头像且拥有Gravatar头像时,则优先使用本地头像。
- <?php
 - class Simple_Local_Avatars {
 - private $user_id_being_edited;
 - public function __construct() {
 - add_filter( ‘get_avatar’, array( $this, ‘get_avatar’ ), 10, 5 );
 - add_action( ‘admin_init’, array( $this, ‘admin_init’ ) );
 - add_action( ‘show_user_profile’, array( $this, ‘edit_user_profile’ ) );
 - add_action( ‘edit_user_profile’, array( $this, ‘edit_user_profile’ ) );
 - add_action( ‘personal_options_update’, array( $this, ‘edit_user_profile_update’ ) );
 - add_action( ‘edit_user_profile_update’, array( $this, ‘edit_user_profile_update’ ) );
 - add_filter( ‘avatar_defaults’, array( $this, ‘avatar_defaults’ ) );
 - }
 - public function get_avatar( $avatar = ”, $id_or_email, $size = 96, $default = ”, $alt = false ) {
 - if ( is_numeric($id_or_email) )
 - $user_id = (int) $id_or_email;
 - elseif ( is_string( $id_or_email ) && ( $user = get_user_by( ’email’, $id_or_email ) ) )
 - $user_id = $user->ID;
 - elseif ( is_object( $id_or_email ) && ! emptyempty( $id_or_email->user_id ) )
 - $user_id = (int) $id_or_email->user_id;
 - if ( emptyempty( $user_id ) )
 - return $avatar;
 - $local_avatars = get_user_meta( $user_id, ‘simple_local_avatar’, true );
 - if ( emptyempty( $local_avatars ) || emptyempty( $local_avatars[‘full’] ) )
 - return $avatar;
 - $size = (int) $size;
 - if ( emptyempty( $alt ) )
 - $alt = get_the_author_meta( ‘display_name’, $user_id );
 - // generate a new size
 - if ( emptyempty( $local_avatars[$size] ) ) {
 - $upload_path = wp_upload_dir();
 - $avatar_full_path = str_replace( $upload_path[‘baseurl’], $upload_path[‘basedir’], $local_avatars[‘full’] );
 - $image_sized = image_resize( $avatar_full_path, $size, $size, true );
 - // deal with original being >= to original image (or lack of sizing ability)
 - $local_avatars[$size] = is_wp_error($image_sized) ? $local_avatars[$size] = $local_avatars[‘full’] : str_replace( $upload_path[‘basedir’], $upload_path[‘baseurl’], $image_sized );
 - // save updated avatar sizes
 - update_user_meta( $user_id, ‘simple_local_avatar’, $local_avatars );
 - } elseif ( substr( $local_avatars[$size], 0, 4 ) != ‘http’ ) {
 - $local_avatars[$size] = home_url( $local_avatars[$size] );
 - }
 - $author_class = is_author( $user_id ) ? ‘ current-author’ : ” ;
 - $avatar = “<img alt=’” . esc_attr( $alt ) . “‘ src=’” . $local_avatars[$size] . “‘ class=’avatar avatar-{$size}{$author_class} photo’ height='{$size}’ width='{$size}’ />”;
 - return apply_filters( ‘simple_local_avatar’, $avatar );
 - }
 - public function admin_init() {
 - //load_plugin_textdomain( ‘simple-local-avatars’, false, dirname( plugin_basename( __FILE__ ) ) . ‘/localization/’ );
 - register_setting( ‘discussion’, ‘simple_local_avatars_caps’, array( $this, ‘sanitize_options’ ) );
 - add_settings_field( ‘simple-local-avatars-caps’, __(‘Local Avatar Permissions’,’simple-local-avatars’), array( $this, ‘avatar_settings_field’ ), ‘discussion’, ‘avatars’ );
 - }
 - public function sanitize_options( $input ) {
 - $new_input[‘simple_local_avatars_caps’] = emptyempty( $input[‘simple_local_avatars_caps’] ) ? 0 : 1;
 -         return $new_input;&nb
sp; - }
 - public function avatar_settings_field( $args ) {
 - $options = get_option(‘simple_local_avatars_caps’);
 - echo ‘
 - <label for=“simple_local_avatars_caps”>
 - <input type=“checkbox” name=“simple_local_avatars_caps” id=“simple_local_avatars_caps” value=“1” ‘ . @checked( $options[‘simple_local_avatars_caps’], 1, false ) . ‘ />
 - ‘ . __(‘仅具有头像上传权限的用户具有设置本地头像权限(作者及更高等级角色)。’,’simple-local-avatars’) . ‘
 - </label>
 - ‘;
 - }
 - public function edit_user_profile( $profileuser ) {
 - ?>
 - <h3><?php _e( ‘头像’,’simple-local-avatars’ ); ?></h3>
 - <table class=“form-table”>
 - <tr>
 - <th><label for=“simple-local-avatar”><?php _e(‘上传头像’,’simple-local-avatars’); ?></label></th>
 - <td style=“width: 50px;” valign=“top”>
 - <?php echo get_avatar( $profileuser->ID ); ?>
 - </td>
 - <td>
 - <?php
 - $options = get_option(‘simple_local_avatars_caps’);
 - if ( emptyempty($options[‘simple_local_avatars_caps’]) || current_user_can(‘upload_files’) ) {
 - do_action( ‘simple_local_avatar_notices’ );
 - wp_nonce_field( ‘simple_local_avatar_nonce’, ‘_simple_local_avatar_nonce’, false );
 - ?>
 - <input type=“file” name=“simple-local-avatar” id=“simple-local-avatar” /><br />
 - <?php
 - if ( emptyempty( $profileuser->simple_local_avatar ) )
 - echo ‘<span class=“description”>’ . __(‘尚未设置本地头像,请点击“浏览”按钮上传本地头像。’,’simple-local-avatars’) . ‘</span>’;
 - else
 - echo ‘
 - <input type=“checkbox” name=“simple-local-avatar-erase” value=an>“1” /> ‘ . __(‘移除本地头像’,’simple-local-avatars’) . ‘<br />
 - <span class=“description”>’ . __(‘如需要修改本地头像,请重新上传新头像。如需要移除本地头像,请选中上方的“移除本地头像”复选框并更新个人资料即可。<br/>移除本地头像后,将恢复使用 Gravatar 头像。’,’simple-local-avatars’) . ‘</span>
 - ‘;
 - } else {
 - if ( emptyempty( $profileuser->simple_local_avatar ) )
 - echo ‘<span class=“description”>’ . __(‘尚未设置本地头像,请在 Gravatar.com 网站设置头像。’,’simple-local-avatars’) . ‘</span>’;
 - else
 - echo ‘<span class=“description”>’ . __(‘你没有头像上传全乡,如需要修改本地头像,请联系站点管理员。’,’simple-local-avatars’) . ‘</span>’;
 - }
 - ?>
 - </td>
 - </tr>
 - </table>
 - <script type=“text/javascript”>var form = document.getElementById(‘your-profile’);form.encoding = ‘multipart/form-data’;form.setAttribute(‘enctype’, ‘multipart/form-data’);</script>
 - <?php
 - }
 - public function edit_user_profile_update( $user_id ) {
 - if ( ! isset( $_POST[‘_simple_local_avatar_nonce’] ) || ! wp_verify_nonce( $_POST[‘_simple_local_avatar_nonce’], ‘simple_local_avatar_nonce’ ) ) //security
 - return;
 - if ( ! emptyempty( $_FILES[‘simple-local-avatar’][‘name’] ) ) {
 - $mimes = array(
 - ‘jpg|jpeg|jpe’ => ‘image/jpeg’,
 - ‘gif’ => ‘image/gif’,
 - ‘png’ => ‘image/png’,
 - ‘bmp’ => ‘image/bmp’,
 - ‘tif|tiff’ => ‘image/tiff’
 - );
 - // front end (theme my profile etc) support
 - if ( ! function_exists( ‘wp_handle_upload’ ) )
 - require_once( ABSPATH . ‘wp-admin/includes/file.php’ );
 - $this->avatar_delete( $user_id ); // delete old images if successful
 -        &
nbsp; // need to be more secure since low privelege users can upload - if ( strstr( $_FILES[‘simple-local-avatar’][‘name’], ‘.php’ ) )
 - wp_die(‘For security reasons, the extension “.php” cannot be in your file name.’);
 - $this->user_id_being_edited = $user_id; // make user_id known to unique_filename_callback function
 - $avatar = wp_handle_upload( $_FILES[‘simple-local-avatar’], array( ‘mimes’ => $mimes, ‘test_form’ => false, ‘unique_filename_callback’ => array( $this, ‘unique_filename_callback’ ) ) );
 - if ( emptyempty($avatar[‘file’]) ) { // handle failures
 - switch ( $avatar[‘error’] ) {
 - case ‘File type does not meet security guidelines. Try another.’ :
 - add_action( ‘user_profile_update_errors’, create_function(‘$a‘,’$a->add(“avatar_error”,__(“请上传有效的图片文件。”,“simple-local-avatars”));’) );
 - break;
 - default :
 - add_action( ‘user_profile_update_errors’, create_function(‘$a‘,’$a->add(“avatar_error”,“<strong>”.__(“上传头像过程中出现以下错误:”,“simple-local-avatars”).“</strong> ‘ . esc_attr( $avatar[‘error’] ) . ‘”);’) );
 - }
 - return;
 - }
 - update_user_meta( $user_id, ‘simple_local_avatar’, array( ‘full’ => $avatar[‘url’] ) ); // save user information (overwriting old)
 - } elseif ( ! emptyempty( $_POST[‘simple-local-avatar-erase’] ) ) {
 - $this->avatar_delete( $user_id );
 - }
 - }
 - /**
 - * remove the custom get_avatar hook for the default avatar list output on options-discussion.php
 - */
 - public function avatar_defaults( $avatar_defaults ) {
 - remove_action( ‘get_avatar’, array( $this, ‘get_avatar’ ) );
 - return $avatar_defaults;
 -     }&nb
sp; - /**
 - * delete avatars based on user_id
 - */
 - public function avatar_delete( $user_id ) {
 - $old_avatars = get_user_meta( $user_id, ‘simple_local_avatar’, true );
 - $upload_path = wp_upload_dir();
 - if ( is_array($old_avatars) ) {
 - foreach ($old_avatars as $old_avatar ) {
 - $old_avatar_path = str_replace( $upload_path[‘baseurl’], $upload_path[‘basedir’], $old_avatar );
 - @unlink( $old_avatar_path );
 - }
 - }
 - delete_user_meta( $user_id, ‘simple_local_avatar’ );
 - }
 - public function unique_filename_callback( $dir, $name, $ext ) {
 - $user = get_user_by( ‘id’, (int) $this->user_id_being_edited );
 - $name = $base_name = sanitize_file_name( substr(md5($user->user_login),0,12) . ‘_avatar’ );
 - $number = 1;
 - while ( file_exists( $dir . “/$name$ext” ) ) {
 - $name = $base_name . ‘_’ . $number;
 - $number++;
 - }
 - return $name . $ext;
 - }
 - }
 - $simple_local_avatars = new Simple_Local_Avatars;
 - function get_simple_local_avatar( $id_or_email, $size = ’96’, $default = ”, $alt = false ) {
 - global $simple_local_avatars;
 - $avatar = $simple_local_avatars->get_avatar( ”, $id_or_email, $size, $default, $alt );
 - if ( emptyempty ( $avatar ) )
 - $avatar = get_avatar( $id_or_email, $size, $default, $alt );
 - return $avatar;
 - }
 
将以上代码加入到functions.php或者functions.php引入的php文件中即可实现Gravatar头像半本地化,最后来张效果图:
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