很多用户咨询，我们的WordPress是否可以添加一个生成海报分享功能，海报分享其实就是利用PHP的GD库来让图片生成，所以你所使用的PHP环境必须支持GD库，今天为大家分享一下WordPress添加生成海报分享封面功能方法。
网上的教程很多都是很简单的描述了下不适合新手，并且原代码存在一些问题导致添加后不能正常使用，自己对代码做了些简单调整，具体调整内容如下：
核心代码打包至 poster 文件夹，方便调用及维护（右侧下载）
更改上传目录为 upload/posterimg （原代码将海报直接上传到媒体库并与文章相关联，并且每次都会生成新的海报，时间长了会导致媒体库臃肿，堆积大量无用文件）
调整前段显示样式（新的样式更好看）
还有一些其他的。。。（我也忘了具体是什么了☹）
注意事项：
PHP 必须开启 GD 库，绘制海报图片要用到。开启方法看这里>>>PHP 如何开启 GD 库？
必须引入 jQuery ，javascript 中 AJAX 提交到 admin-ajax.php 处理要用到
详细步骤：
一、好了，下面简单说下使用方法，添加下面代码到文章适当位置，一般位于主题single.php文件里，自己找个合适位置添加如下代码（前端按钮）：
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”poster-share-ico\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<a class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”btn-bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-nonce=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php echo wp_create_nonce(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’mi-create-bigger-image-\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.$post->ID );?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php echo $post->ID; ?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-action=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”create-bigger-image\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”javascript:;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”><i class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”fa fa-paper-plane\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></i> <span>生成海报</span></a>
</div>
二、添加下面代码到网页底部文件中，位于主题下footer.php文件，建议添加到footer代码结束后
<?php
require_once get_stylesheet_directory() . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/poster/poster-pop.php\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
?>
三、在functions.php 文件中添加如下代码（海报生成）：
<?php
require get_stylesheet_directory() . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/poster/poster.php\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
?>
注意：如果生成海报失败的原因，首先网站需要jQuery支持，因为使用的jQuery的AJAX提交到主题后端处理，再有还可能是下面这段 js 代码中路径的问题，默认是没有将 WordPress 安装到子目录的方式，将其\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\poster\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\js\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\poster.js里修改为你网站的 admin-ajax.php 文件位置应该就可以了。
//提交到wordpress自带的ajax处理
$(document).on(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’click touchstart\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.btn-bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, function (event) {
event.preventDefault();
var bigger_cover = $(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-image img\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’),
btn_bigger_cover = $(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
if (bigger_cover.hasClass(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’load-poster-img\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’)) {
$.ajax({
//url: jsui.ajax_url,
url: \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/wp-admin\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/admin-ajax.php\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, // 这地方改成自己的 admin-ajax.php 地址
type: \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’POST\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
dataType: \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’json\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
data: btn_bigger_cover.data(),
}).done(function (data) {
if (data.s == 200) {
bigger_cover.attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’src\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.src);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share-weibo\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’href\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.share_weibo);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share-qzone\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’href\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.share_qzone);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share-qq\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’href\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.share_qq);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share-renren\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’href\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.share_renren);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-down\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).attr(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’href\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, data.src);
bigger_cover.removeClass(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’load-poster-img\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.image-loading\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).remove();
} else {
alert( data.m );
}
}).fail(function () {
alert(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’Error：网络错误，请稍后再试！\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
})
}
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).css({\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’opacity\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’1\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’visibility\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’inherit\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’});
});
//关闭窗口
$(document).on(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’click touchstart\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-close\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,function() {
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.poster-share\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).css({\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’opacity\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’0\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’visibility\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’hidden\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’});
});
如果按以上步骤设置正确了 ，那么你的主题应该已经实现了海报分享的功能。
扩展应用：
如果你是的主题使用了 OptionsFrameWork 框架搭建的后台设置面板，那么下面的步骤将有助于你生成一些后台控制按钮。将以下代码添加到主题 options.php 文件中去（部分主题可能不叫这名）：
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’蝈蝈海报\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’heading\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
);
// 分享海报
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’海报功能开启\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’poster_share_open\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’std\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => true,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’开启\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’checkbox\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’默认头部大图\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’上传一张显示在封面顶部的大图\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’poster_default_img\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’std\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’upload\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
);
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’左下角LOGO\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’上传一张显示在封面底部的LOGO\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’poster_logo\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’std\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’upload\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
);
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’网站宣传语\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’显示在LOGO下方的一句宣传语\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’poster_desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’std\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’text\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
);
$options[] = array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’name\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’右下角二维码\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’desc\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’开启后将再封面图的右下角现在当前文章的二维码\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’QGG\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’share_poster_img_qrcode\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’std\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => false,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’type\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’checkbox\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
);
将 single.php 文件中的调用代码调整为如下代码：
<?php if( QGG_options(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’poster_share_open\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’) ){ ?>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”poster-share-ico\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<a class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”btn-bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-nonce=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php echo wp_create_nonce(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’mi-create-bigger-image-\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.$post->ID );?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php echo $post->ID; ?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-action=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”create-bigger-image\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”bigger-cover\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”javascript:;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”><i class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”fa fa-paper-plane\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></i> <span>生成海报</span></a>
</div>
<?php } ?>
取消 poster.php 文件中如下代码的注释（大概在342行位置）：
// 获取海报底部二维码图片
//if(QGG_Options(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’share_poster_img_qrcode\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’)){
$qrcode_img = get_template_directory_uri().\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/poster/functions/qrcode.php?data=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.get_the_permalink($post_id);
//}else{
//$qrcode_img = NULL;
//}