实现wordpress后台回复评论支持插入表情

下面是简单明了（自大）的步骤方法：

1. functions.php 部分（就是把下面的代码扔 functions.php）

//////// 获取表情按钮，源码 willin 改进 zwwooooo
function zfunc_smiley_button($custom=false, $before='', $after=''){
    if ($custom==true)
        $smiley_url=get_template_directory_uri().'/images/smilies';
    else
        $smiley_url=site_url().'/wp-includes/images/smilies';
    echo $before;
    ?>
        <a href="javascript:grin(':?:')"><img src="<?php echo $smiley_url; ?>/icon_question.gif" alt="" /></a>
        <a href="javascript:grin(':razz:')"><img src="<?php echo $smiley_url; ?>/icon_razz.gif" alt="" /></a>
        <a href="javascript:grin(':sad:')"><img src="<?php echo $smiley_url; ?>/icon_sad.gif" alt="" /></a>
        <a href="javascript:grin(':evil:')"><img src="<?php echo $smiley_url; ?>/icon_evil.gif" alt="" /></a>
        <a href="javascript:grin(':!:')"><img src="<?php echo $smiley_url; ?>/icon_exclaim.gif" alt="" /></a>
        <a href="javascript:grin(':smile:')"><img src="<?php echo $smiley_url; ?>/icon_smile.gif" alt="" /></a>
        <a href="javascript:grin(':oops:')"><img src="<?php echo $smiley_url; ?>/icon_redface.gif" alt="" /></a>
        <a href="javascript:grin(':grin:')"><img src="<?php echo $smiley_url; ?>/icon_biggrin.gif" alt="" /></a>
        <a href="javascript:grin(':eek:')"><img src="<?php echo $smiley_url; ?>/icon_surprised.gif" alt="" /></a>
        <a href="javascript:grin(':shock:')"><img src="<?php echo $smiley_url; ?>/icon_eek.gif" alt="" /></a>
        <a href="javascript:grin(':???:')"><img src="<?php echo $smiley_url; ?>/icon_confused.gif" alt="" /></a>
        <a href="javascript:grin(':cool:')"><img src="<?php echo $smiley_url; ?>/icon_cool.gif" alt="" /></a>
        <a href="javascript:grin(':lol:')"><img src="<?php echo $smiley_url; ?>/icon_lol.gif" alt="" /></a>
        <a href="javascript:grin(':mad:')"><img src="<?php echo $smiley_url; ?>/icon_mad.gif" alt="" /></a>
        <a href="javascript:grin(':twisted:')"><img src="<?php echo $smiley_url; ?>/icon_twisted.gif" alt="" /></a>
        <a href="javascript:grin(':roll:')"><img src="<?php echo $smiley_url; ?>/icon_rolleyes.gif" alt="" /></a>
        <a href="javascript:grin(':wink:')"><img src="<?php echo $smiley_url; ?>/icon_wink.gif" alt="" /></a>
        <a href="javascript:grin(':idea:')"><img src="<?php echo $smiley_url; ?>/icon_idea.gif" alt="" /></a>
        <a href="javascript:grin(':arrow:')"><img src="<?php echo $smiley_url; ?>/icon_arrow.gif" alt="" /></a>
        <a href="javascript:grin(':neutral:')"><img src="<?php echo $smiley_url; ?>/icon_neutral.gif" alt="" /></a>
        <a href="javascript:grin(':cry:')"><img src="<?php echo $smiley_url; ?>/icon_cry.gif" alt="" /></a>
        <a href="javascript:grin(':mrgreen:')"><img src="<?php echo $smiley_url; ?>/icon_mrgreen.gif" alt="" /></a>
<?php
    echo $after;
}

//////// Ajax_data_zfunc_smiley_button by zwwooooo
function Ajax_data_zfunc_smiley_button(){
    if( isset($_GET['action'])&& $_GET['action'] == 'Ajax_data_zfunc_smiley_button'  ){
        nocache_headers();

        zfunc_smiley_button(false, '<br />');

        die();
    }
}
add_action('init', 'Ajax_data_zfunc_smiley_button');

//////// 后台回复评论支持表情插入 by zwwooooo
function zfunc_admin_enqueue_scripts( $hook_suffix ) {
    wp_enqueue_script( 'zfunc-comment-reply', get_template_directory_uri() . '/admin_reply.js', false, 'by-zwwooooo' );
}
add_action( 'admin_print_styles', 'zfunc_admin_enqueue_scripts' );

2. 然后是在所用主题目录里面新建 admin_reply.js，内容如下：

///// 适用于 WordPress 3.8，如果较老版本请把 #comments-form 替换为 #icon-edit-comments，或者干脆把第4行和第11行删除/注释掉。
jQuery(document).ready(function($){
    var data_zfunc_smiley_button='';
    if ($('#comments-form').length) {
        $.get('./?action=Ajax_data_zfunc_smiley_button',
            function (data) {
                data_zfunc_smiley_button=data;
                $('#qt_replycontent_toolbar input:last').after(data_zfunc_smiley_button);
            }
        );
    }
});

function grin(tag) {
    var myField;
    tag = ' ' + tag + ' ';
        if (document.getElementById('replycontent') && document.getElementById('replycontent').type == 'textarea') {
        myField = document.getElementById('replycontent');
    } else {
        return false;
    }
    if (document.selection) {
        myField.focus();
        sel = document.selection.createRange();
        sel.text = tag;
        myField.focus();
    }
    else if (myField.selectionStart || myField.selectionStart == '0') {
        var startPos = myField.selectionStart;
        var endPos = myField.selectionEnd;
        var cursorPos = endPos;
        myField.value = myField.value.substring(0, startPos)
                      + tag
                      + myField.value.substring(endPos, myField.value.length);
        cursorPos += tag.length;
        myField.focus();
        myField.selectionStart = cursorPos;
        myField.selectionEnd = cursorPos;
    }
    else {
        myField.value += tag;
        myField.focus();
    }
}

效果如下：