Answers:
您应该使用wp.media
WordPress媒体管理器对话框。
首先,您需要排队脚本:
// As you are dealing with plugin settings,
// I assume you are in admin side
add_action( 'admin_enqueue_scripts', 'load_wp_media_files' );
function load_wp_media_files( $page ) {
// change to the $page where you want to enqueue the script
if( $page == 'options-general.php' ) {
// Enqueue WordPress media scripts
wp_enqueue_media();
// Enqueue custom script that will interact with wp.media
wp_enqueue_script( 'myprefix_script', plugins_url( '/js/myscript.js' , __FILE__ ), array('jquery'), '0.1' );
}
}
您的HTML可能是这样的(请注意,我的代码在插件设置中使用附件ID代替了您在回答中所做的图像url,我认为它会好得多。例如,使用ID可以在您获得不同的图像大小时需要他们):
$image_id = get_option( 'myprefix_image_id' );
if( intval( $image_id ) > 0 ) {
// Change with the image size you want to use
$image = wp_get_attachment_image( $image_id, 'medium', false, array( 'id' => 'myprefix-preview-image' ) );
} else {
// Some default image
$image = '<img id="myprefix-preview-image" src="https://some.default.image.jpg" />';
}
<?php echo $image; ?>
<input type="hidden" name="myprefix_image_id" id="myprefix_image_id" value="<?php echo esc_attr( $image_id ); ?>" class="regular-text" />
<input type='button' class="button-primary" value="<?php esc_attr_e( 'Select a image', 'mytextdomain' ); ?>" id="myprefix_media_manager"/>ç
myscript.js
jQuery(document).ready( function($) {
jQuery('input#myprefix_media_manager').click(function(e) {
e.preventDefault();
var image_frame;
if(image_frame){
image_frame.open();
}
// Define image_frame as wp.media object
image_frame = wp.media({
title: 'Select Media',
multiple : false,
library : {
type : 'image',
}
});
image_frame.on('close',function() {
// On close, get selections and save to the hidden input
// plus other AJAX stuff to refresh the image preview
var selection = image_frame.state().get('selection');
var gallery_ids = new Array();
var my_index = 0;
selection.each(function(attachment) {
gallery_ids[my_index] = attachment['id'];
my_index++;
});
var ids = gallery_ids.join(",");
jQuery('input#myprefix_image_id').val(ids);
Refresh_Image(ids);
});
image_frame.on('open',function() {
// On open, get the id from the hidden input
// and select the appropiate images in the media manager
var selection = image_frame.state().get('selection');
var ids = jQuery('input#myprefix_image_id').val().split(',');
ids.forEach(function(id) {
var attachment = wp.media.attachment(id);
attachment.fetch();
selection.add( attachment ? [ attachment ] : [] );
});
});
image_frame.open();
});
});
// Ajax request to refresh the image preview
function Refresh_Image(the_id){
var data = {
action: 'myprefix_get_image',
id: the_id
};
jQuery.get(ajaxurl, data, function(response) {
if(response.success === true) {
jQuery('#myprefix-preview-image').replaceWith( response.data.image );
}
});
}
然后使用Ajax操作刷新图像预览:
// Ajax action to refresh the user image
add_action( 'wp_ajax_myprefix_get_image', 'myprefix_get_image' );
function myprefix_get_image() {
if(isset($_GET['id']) ){
$image = wp_get_attachment_image( filter_input( INPUT_GET, 'id', FILTER_VALIDATE_INT ), 'medium', false, array( 'id' => 'myprefix-preview-image' ) );
$data = array(
'image' => $image,
);
wp_send_json_success( $data );
} else {
wp_send_json_error();
}
}
PD:这是根据其他答案在此处编写的快速示例。未测试,因为您没有提供有关将使用代码的确切上下文或存在的确切问题的足够信息。
wordpress-settings-api-class
由网址的Tareq Hasan 使用:https://github.com/tareq1988/wordpress-settings-api-class
class.settings-api.php
在您的插件中包含主类。(此文件https://github.com/tareq1988/wordpress-settings-api-class/blob/master/src/class.settings-api.php)'type' => 'file'
来添加媒体上载器。(请参阅此示例,以更好地了解https://github.com/tareq1988/wordpress-settings-api-class/blob/master/example/procedural-example.php)wp.media
控制。
由于您希望每个用户的图标都不同,因此必须将图像存储在用户配置文件中。这意味着您需要添加一个额外的用户字段:
// create the field
add_action( 'show_user_profile', 'wpse_235406_chaticon' );
add_action( 'edit_user_profile', 'wpse_235406_chaticon' );
function wpse_235406_chaticon ($user) {
echo '
<h3>Chat Icon</h3>
<table class="form-table">
<tr>
<th><label for="chaticon">Chat Icon</label></th>
<td>
<input type="file" name="chaticon" id="chaticon" value="' . esc_attr (get_the_author_meta ('chaticon', $user->ID)) . '" class="file-upload" /><br />
<span class="description">Please select your chat icon.</span>
</td>
</tr>
</table>';
}
// save the field
add_action( 'personal_options_update', 'wpse_235406_chaticon_save' );
add_action( 'edit_user_profile_update', 'wpse_235406_chaticon_save' );
function wpse_235406_chaticon_save ($user_id) {
if (current_user_can ('edit_user', $user_id))
update_usermeta ($user_id, 'chaticon', $_POST['chaticon']);
}
现在,这使您可以从用户的计算机上载文件。如果您希望用户从现有图像中选择文件,事情会变得更加复杂,因为这时您需要调用媒体库来代替默认的文件上传。史蒂文·斯拉克(Steven Slack)写了一篇很棒的文章,介绍了如何做到这一点,我不想在这里复制粘贴他的代码来赞扬他。
在您的模板中,您必须区分三种可能性:用户未登录,用户登录但没有图标,用户登录并有图标。大致包括以下内容:
$current_user = wp_get_current_user();
if ( 0 == $current_user->ID ) {
... do what you want to do for not logged in users ...
}
else {
$icon = get_user_meta ($current_user->ID, 'chaticon');
if (empty($icon)) {
... default icon with link to upload possibility ...
}
else {
... display $icon ...
}
您可以在以下网址上找到带有插件的完整代码:http : //blog.adlivetech.com/use-wordpress-media-upload-custom-code/
易于使用,只需将代码复制粘贴到您所需的位置
我使用了此解决方案(不使用媒体库本身):
在模态中使用image-picker-lib来设置隐藏输入的值,该值将发布到选项中。通过获取所有媒体并将其作为选项进行回显,我可以让用户选择一个img。
的HTML
<input id="image" name="image" class="validate" type="image" src="<?php echo esc_attr(get_option('image_url')); ?>" id="image_url" width="48" height="48" />
<br>
<a href="#imageModal" class="waves-effect waves-light btn modal-trigger">
change
</a>
<input id="image_url" name="image_url" type="text" value="" hidden />
PHP / HTML
<div id="imageModal" class="modal">
<div class="modal-content">
<select class="image-picker show-html">
<option data-img-src="<?php echo CM_PATH . "/img/chat_general.png" ?>" value="0"></option>
<?php
$query_images_args = array(
'post_type' => 'attachment',
'post_mime_type' => 'image',
'post_status' => 'inherit',
'posts_per_page' => - 1,
);
$query_images = new WP_Query( $query_images_args );
$i = 1;
foreach ( $query_images->posts as $image ) {
?>
<option data-img-src="<?php echo wp_get_attachment_url($image->ID); ?>" value="<?php echo $i; ?>"></option>
<?php
$i ;
}
?>
</select>
</div>
<div class="modal-footer">
<a class="waves-effect waves-light btn change">Choose</a>
</div>
</div>
</div>
</div>
JS
$(".change").on("click", function() {
+ var url = $(".image-picker > option:selected").attr("data-img-src");
+ $("#image").attr("src", url);
+ $("#image_url").attr("value", url);
+ $("#imageModal").closeModal();
+ });
wp.media
控制。
wp.media
允许自定义上传,并为此选择媒体文件。WPSE有很多的例子,但也许这帖子可以帮助你jeroensormani.com/...另外你在github上找到的例子,尤其是ocean90 - github.com/ocean90/media-modal-demo