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WordPress实现评论表情

   2019年3月19日  3,669  2 Comments
WordPress实现评论表情

默认 WordPress 评论只能写文字，如何在评论时可以添加表情呢？

我根据自己主题 cutewp，同时参考链接：如何替换 WordPress 的默认评论表情？实现了评论表情。效果如下图所示：

WordPress实现评论表情-打不死的小强

实现过程如下：

1、下载放置表情包

将参考链接中的表情包下载下来，将 smilies 目录上传到主题目录下的 images（没有创建）目录。

WordPress实现评论表情-打不死的小强
2、添加自定义表情路径和名称

在主题目录的 functions.php 最后加入如下代码：

//自定义表情路径和名称
function custom_smilies_src($src, $img){return get_bloginfo('template_directory').'/images/smilies/' . $img;}
add_filter('smilies_src', 'custom_smilies_src', 10, 2);
    if ( !isset( $wpsmiliestrans ) ) {
        $wpsmiliestrans = array(
        ':cy:' => 'cy.gif',
        ':hanx:' => 'hanx.gif',
        ':huaix:' => 'huaix.gif',
        ':tx:' => 'tx.gif',
          ':se:' => 'se.gif',
          ':wx:' => 'wx.gif',
          ':zk:' => 'zk.gif',
           ':shui:' => 'shui.gif',
           ':kuk:' => 'kuk.gif',
           ':lh:' => 'lh.gif',
           ':gz:' => 'gz.gif',
           ':ku:' => 'ku.gif',
           ':kel:' => 'kel.gif',
           ':yiw:' => 'yiw.gif',
           ':yun:' => 'yun.gif',
           ':jy:' => 'jy.gif',
           ':dy:' => 'dy.gif',
           ':gg:' => 'gg.gif',
           ':fn:' => 'fn.gif',
           ':fendou:' => 'fendou.gif',
           ':shuai:' => 'shuai.gif',
           ':kl:' => 'kl.gif',
           ':pj:' => 'pj.gif',
            ':fan:' => 'fan.gif',
            ':lw:' => 'lw.gif',
            ':qiang:' => 'qiang.gif',
            ':ruo:' => 'ruo.gif',
            ':ws:' => 'ws.gif',
             ':ok:' => 'ok.gif',
              ':gy:' => 'gy.gif',
              ':qt:' => 'qt.gif',
              ':cj:' => 'cj.gif',
              ':aini:' => 'aini.gif',
              ':bu:' => 'bu.gif',
        );
    }
3、定义表情添加方法

找到要添加表情的位置（可以利用浏览器开发者工具定位元素，利用 IDE 工具找到代码文件及位置）。我找到位置文件为：wp-includes/comment-template.php ，在文件最后加如下方法：

// 添加评论表情自定义方法
function get_comment_smilies(){
    $content = '
        <script type="text/javascript">
            /* <![CDATA[ */
            function grin(tag) {
    	        var myField;
    	        tag = " " + tag + " ";
        if (document.getElementById("comment") && document.getElementById("comment").type == "textarea") {
    		myField = document.getElementById("comment");
    	} 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();
    	}
    }
    function show_smilies(){
		var sdiv = document.getElementById("smilies-a-div");
                var sa = document.getElementById("smilies-a");
		if(sdiv){
			if(sdiv.style.display=="block"){
				sdiv.style.display="none";
                                sa.style.color="#666666";
                                sa.title="使用表情";
			}else{
				sdiv.style.display="block";
                                sa.style.color="#f80b16";
                                sa.title="隐藏表情";
			}
		}
		
	}
    /* ]]> */
    </script>
    <style type="text/css">
	.smilies-a{margin-left:13px; font-size: 2rem;}
	.smilies-a:hover{color:#f80b16;}
    </style>
    <a id="smilies-a" class="smilies-a" href="javascript:void(0);" onclick="show_smilies()" title="使用表情"><i class="fa fa-smile-o"></i></a>
    <div id="smilies-a-div" style="margin-left:10px; display:none">
		<a href="javascript:grin(\':cy:\')"><img src="/wp-content/themes/cutewp/images/smilies/cy.gif" alt="" /></a>
		<a href="javascript:grin(\':hanx:\')"><img src="/wp-content/themes/cutewp/images/smilies/hanx.gif" alt="" /></a>
		<a href="javascript:grin(\':huaix:\')"><img src="/wp-content/themes/cutewp/images/smilies/huaix.gif" alt="" /></a>
		<a href="javascript:grin(\':tx:\')"><img src="/wp-content/themes/cutewp/images/smilies/tx.gif" alt="" /></a>
		<a href="javascript:grin(\':se:\')"><img src="/wp-content/themes/cutewp/images/smilies/se.gif" alt="" /></a>
		<a href="javascript:grin(\':wx:\')"><img src="/wp-content/themes/cutewp/images/smilies/wx.gif" alt="" /></a>
		<a href="javascript:grin(\':zk:\')"><img src="/wp-content/themes/cutewp/images/smilies/zk.gif" alt="" /></a>
		<a href="javascript:grin(\':shui:\')"><img src="/wp-content/themes/cutewp/images/smilies/shui.gif" alt="" /></a>
		<a href="javascript:grin(\':kuk:\')"><img src="/wp-content/themes/cutewp/images/smilies/kuk.gif" alt="" /></a>
		<a href="javascript:grin(\':lh:\')"><img src="/wp-content/themes/cutewp/images/smilies/lh.gif" alt="" /></a>
		<a href="javascript:grin(\':gz:\')"><img src="/wp-content/themes/cutewp/images/smilies/gz.gif" alt="" /></a>
		<a href="javascript:grin(\':ku:\')"><img src="/wp-content/themes/cutewp/images/smilies/ku.gif" alt="" /></a>
		<a href="javascript:grin(\':kel:\')"><img src="/wp-content/themes/cutewp/images/smilies/kel.gif" alt="" /></a>
		<a href="javascript:grin(\':yiw:\')"><img src="/wp-content/themes/cutewp/images/smilies/yiw.gif" alt="" /></a>
		<a href="javascript:grin(\':yun:\')"><img src="/wp-content/themes/cutewp/images/smilies/yun.gif" alt="" /></a>

		<a href="javascript:grin(\':jy:\')"><img src="/wp-content/themes/cutewp/images/smilies/jy.gif" alt="" /></a>
		<a href="javascript:grin(\':dy:\')"><img src="/wp-content/themes/cutewp/images/smilies/dy.gif" alt="" /></a>
		<a href="javascript:grin(\':gg:\')"><img src="/wp-content/themes/cutewp/images/smilies/gg.gif" alt="" /></a>
		<a href="javascript:grin(\':fn:\')"><img src="/wp-content/themes/cutewp/images/smilies/fn.gif" alt="" /></a>
		<a href="javascript:grin(\':fendou:\')"><img src="/wp-content/themes/cutewp/images/smilies/fendou.gif" alt="" /></a>
		<a href="javascript:grin(\':shuai:\')"><img src="/wp-content/themes/cutewp/images/smilies/shuai.gif" alt="" /></a>
		<a href="javascript:grin(\':kl:\')"><img src="/wp-content/themes/cutewp/images/smilies/kl.gif" alt="" /></a>

		<a href="javascript:grin(\':pj:\')"><img src="/wp-content/themes/cutewp/images/smilies/pj.gif" alt="" /></a>
		<a href="javascript:grin(\':lw:\')"><img src="/wp-content/themes/cutewp/images/smilies/lw.gif" alt="" /></a>
		<a href="javascript:grin(\':qiang:\')"><img src="/wp-content/themes/cutewp/images/smilies/qiang.gif" alt="" /></a>
		<a href="javascript:grin(\':ruo:\')"><img src="/wp-content/themes/cutewp/images/smilies/ruo.gif" alt="" /></a>
		<a href="javascript:grin(\':ws:\')"><img src="/wp-content/themes/cutewp/images/smilies/ws.gif" alt="" /></a>
		<a href="javascript:grin(\':ok:\')"><img src="/wp-content/themes/cutewp/images/smilies/ok.gif" alt="" /></a>

		<a href="javascript:grin(\':gy:\')"><img src="/wp-content/themes/cutewp/images/smilies/gy.gif" alt="" /></a>
		<a href="javascript:grin(\':qt:\')"><img src="/wp-content/themes/cutewp/images/smilies/qt.gif" alt="" /></a>
		<a href="javascript:grin(\':aini:\')"><img src="/wp-content/themes/cutewp/images/smilies/aini.gif" alt="" /></a>
    </div>
    ';
    return $content;
}

说明：该方法是我参考 smiley.php 的内容修改的。

4、调用添加方法

在 wp-includes/comment-template.php 的评论 textarea 所在代码处,，如下：

$fields = apply_filters( 'comment_form_default_fields', $fields );
$defaults = array(
    'fields' => $fields,
    'comment_field' => '<p class="comment-form-comment"><label for="comment">' . _x( 'Comment', 'noun' ) . '</label> <textarea id="comment" name="comment" cols="45" rows="8" maxlength="65525" required="required"></textarea></p>'
    /* 在这个位置调用添加表情方法喔! */
    ,
    /** This filter is documented in wp-includes/link-template.php */
    'must_log_in' => '<p class="must-log-in">' . sprintf(

调用上步定义的方法 get_comment_smilie() ，代码如下：

</textarea></p>' .get_comment_smilies(),
/** This filter is documented in wp-includes/link-template.php */

注意：上面两段代码对应着看，注意调用位置及逗号（,）。

上述步骤操作完，就可以看到效果了。

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