在我们wordpress开发中经常会遇到编辑器的问题，wordpress自带有个编辑器wp_editor，编辑器有上传图片功能，但是是需要添加到媒体且需要弹出媒体库的窗口，这样对于在前台投稿的用户来说可能不太友好。那么我们如何能在前台添加一个极简且带图片上传的编辑器呢？这里给大家讲解一下。
首先调用编辑器，我们需要对编辑器上面的按钮简化一下。
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以及处理上传的逻辑
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来实现上传
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(); } } }); });
最后需要说明一点的是，用户需要具备wordpress的上传权限。
教程比较初略，需要具备一定开发能力的人方可了解清楚~
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