在我们的wordpress开发中，经常会遇到编辑器的问题。 Wordpress 带有一个编辑器 wp_editor。 编辑器有上传图片的功能，但是需要添加到媒体中，需要弹出媒体库的窗口。 它可能对用户不友好。 那么我们如何在前台添加一个带有图像上传的极简编辑器呢？这里模板兔让我给你解释一下。

首先调用编辑器，我们需要简化编辑器上的按钮。

wp_editor( '', 'task_content', task_editor_settings(array('textarea_name'=>'content', 'height'=>250, 'allow_img'=> 1)) );

然后我们定义一些函数和处理上传的逻辑

function task_editor_settings($args = array()){
$allow_img = isset($args['allow_img']) && $args['allow_img'] ? 1 : 0;
return array(
'textarea_name' => $args['textarea_name'],
'media_buttons' => false,
'quicktags' => false,
'tinymce' => array(
'statusbar' => false,
'height' => isset($args['height']) ? $args['height'] : 120,
'toolbar1' => 'bold,italic,underline,blockquote,bullist,numlist'.($allow_img?',TaskImg':''),
'toolbar2' => '',
'toolbar3' => ''
)
);
}
add_filter( 'mce_external_plugins', 'erphp_task_mce_plugin');
function erphp_task_mce_plugin($plugin_array){
$plugin_array['TaskImg'] = ERPHP_TASK_URL . '/static/js/TaskImg.js';
return $plugin_array;
}
add_action('wp_ajax_task_img_upload', 'erphp_task_img_upload');
function erphp_task_img_upload(){
$res = array();
$user = wp_get_current_user();
if($user->ID){
$upfile = $_FILES['upfile'];
$upload_overrides = array('test_form' => false);
$file_return = wp_handle_upload($upfile, $upload_overrides);
if ($file_return && !isset($file_return['error'])) {
// 保存到媒体库
$attachment = array(
'post_title' => preg_replace( '/.[^.]+$/', '', basename( $file_return['file'] ) ),
'post_mime_type' => $file_return['type'],
);
$attach_id = wp_insert_attachment($attachment, $file_return['file']);
$attach_data = generate_attachment_metadata($attach_id, $file_return['file']);
wp_update_attachment_metadata($attach_id, $attach_data);
$res['result'] = 0;
$file_return['alt'] = preg_replace( '/.[^.]+$/', '', basename( $file_return['file'] ) );
$res['image'] = $file_return;
} else {
$res['result'] = 1;
}
} else {
$res['result'] = 2;
}
echo json_encode($res);
exit;
}
function generate_attachment_metadata($attachment_id, $file) {
$attachment = get_post ( $attachment_id );
$metadata = array ();
if (!function_exists('file_is_displayable_image')) include( ABSPATH . 'wp-admin/includes/image.php' );
if (preg_match ( '!^image/!', get_post_mime_type ( $attachment ) ) && file_is_displayable_image ( $file )) {
$imagesize = getimagesize ( $file );
$metadata ['width'] = $imagesize [0];
$metadata ['height'] = $imagesize [1];
list ( $uwidth, $uheight ) = wp_constrain_dimensions ( $metadata ['width'], $metadata ['height'], 128, 96 );
$metadata ['hwstring_small'] = "height="$uheight" width="$uwidth"";
// Make the file path relative to the upload dir
$metadata ['file'] = _wp_relative_upload_path ( $file );
// work with some watermark plugin
$metadata = apply_filters ( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
}
return $metadata;
}

然后需要js实现上传

tinymce.PluginManager.add('TaskImg', function(editor, url) {
var $el = jQuery(editor.getElement()).parent();
var timer = null;
var input = document.createElement('input');
input.setAttribute('type', 'file');
input.setAttribute('accept', 'image/*');
function notice(type, msg, time){
clearTimeout(timer);
jQuery('#notice').remove();
$el.append('<div id="notice"><div class="notice-bg"></div><div class="notice-wrap"><div class="notice-inner notice-'+type+'">'+msg+'</div></div></div>');
if(time) {
timer = setTimeout(function () {
jQuery('#notice').remove();
}, time);
}
}
function img_post() {
var fd = new FormData();
fd.append( "upfile", input.files[0]);
fd.append( "action", 'task_img_upload'); 
jQuery.ajax({
type: 'POST',
url: _ERPHP.ajaxurl,
data: fd, 
processData: false,
contentType: false,
dataType: 'json',
success: function(data, textStatus, XMLHttpRequest) {
clearTimeout(timer);
jQuery('#notice').remove();
if(data.result=='0'){
editor.insertContent( '<img src="'+data.image.url+'" alt="'+data.image.alt+'">' );
}else{
notice(0, '图片上传出错，请稍后再试！', 1200);
}
},
error: function(MLHttpRequest, textStatus, errorThrown) {
clearTimeout(timer);
jQuery('#notice').remove();
alert(errorThrown);
}
});
}
input.onchange = function() {
var file = this.files[0];
if(file){
if(!/.(gif|jpg|jpeg|png|GIF|JPG|JPEG|PNG)$/.test(file.name)){
notice(0, '仅支持上传jpg、png、gif格式的图片文件', 2000);
return false;
}else if(file.size > 2 * 1024 * 1024){
notice(0, '图片大小不能超过2M', 1500);
return false;
}else{
img_post();
notice(1, '正在上传...', 0);
}
}
};
editor.addButton('TaskImg', {
text: '',
icon: 'image',
tooltip: "上传图片",
classes: 'TaskImg',
onclick: function() {
if( ! /Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent) ) {
input.click();
}
},
onTouchEnd: function(){
if( /Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent) ) {
input.click();
}
}
});
});

最后要注意的是用户需要有wordpress的上传权限。

教程比较简短，只有有一定开发能力的人才看得清楚~