代码实现WordPress添加本地头像功能代替Gravatar头像

概述　　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。

下面是内存溢出 jb51.cc 通过网络收集整理的代码片段。内存溢出小编现在分享给大家，也给大家做个参考。

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','admin_init' ) );

add_action( 'show_user_profile','edit_user_profile' ) );

add_action( 'edit_user_profile','edit_user_profile' ) );

add_action( 'personal_options_update','edit_user_profile_update' ) );

add_action( 'edit_user_profile_update','edit_user_profile_update' ) );

add_filter( 'avatar_defaults','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 ) && ! empty( $ID_or_email->user_ID ) )

$user_ID = (int) $ID_or_email->user_ID;

if ( empty( $user_ID ) )

return $avatar;

$local_avatars = get_user_Meta( $user_ID,'simple_local_avatar',true );

if ( empty( $local_avatars ) || empty( $local_avatars['full'] ) )

return $avatar;

$size = (int) $size;

if ( empty( $alt ) )

$alt = get_the_author_Meta( 'display_name',$user_ID );

// generate a new size

if ( empty( $local_avatars[$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,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( $user_ID,$local_avatars );

} elseif ( substr( $local_avatars[$size],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','sanitize_options' ) );

add_settings_fIEld( 'simple-local-avatars-caps',__('Local Avatar Permissions','simple-local-avatars'),'avatar_settings_fIEld' ),'discussion','avatars' );

}

public function sanitize_options( $input ) {

$new_input['simple_local_avatars_caps'] = empty( $input['simple_local_avatars_caps'] ) ? 0 : 1;

return $new_input;

}

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 >

<tr>

<th><label for="simple-local-avatar"><?PHP _e('上传头像','simple-local-avatars'); ?></label></th>

<td wIDth: 50px;" valign="top">

<?PHP echo get_avatar( $profileuser->ID ); ?>

</td>

<td>

<?PHP

$options = get_option('simple_local_avatars_caps');

if ( empty($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 ( empty( $profileuser->simple_local_avatar ) )

echo '<span >' . __('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="1" /> ' . __('移除本地头像','simple-local-avatars') . '<br />

<span >' . __('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 ( empty( $profileuser->simple_local_avatar ) )

echo '<span >' . __('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 >' . __('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 ( ! empty( $_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

// 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 ( empty($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',"<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,array( 'full' => $avatar['url'] ) ); // save user information (overwriting old)

} elseif ( ! empty( $_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','get_avatar' ) );

return $avatar_defaults;

}

/**

* delete avatars based on user_ID

*/

public function avatar_delete( $user_ID ) {

$old_avatars = get_user_Meta( $user_ID,true );

$upload_path = wp_upload_dir();

if ( is_array($old_avatars) ) {

foreach ($old_avatars as $old_avatar ) {

$old_avatar_path = str_replace( $upload_path['baseurl'],$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),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',$alt = false ) {

global $simple_local_avatars;

$avatar = $simple_local_avatars->get_avatar( '',$default,$alt );

if ( empty ( $avatar ) )

$avatar = get_avatar( $ID_or_email,$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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