From 1bb8f0071974c48ca4abdaf1b813f5aae3219499 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=A3=E6=82=A0=E7=84=B6?= <youranreus@qq.com>
Date: Fri, 14 May 2021 22:40:33 +0800
Subject: [PATCH] =?UTF-8?q?=E8=87=AA=E5=8A=A8=E9=80=89=E6=8B=A9=E7=AC=AC?=
 =?UTF-8?q?=E4=B8=80=E5=BC=A0=E5=9B=BE=E7=89=87=E4=B8=BA=E5=A4=B4=E5=9B=BE?=
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Content-Transfer-Encoding: 8bit

---
 functions.php | 23 +++++++++++++++++++++++
 index.php     |  2 +-
 post.php      |  2 +-
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/functions.php b/functions.php
index 8bb363c..443ed75 100644
--- a/functions.php
+++ b/functions.php
@@ -40,6 +40,12 @@ function themeConfig($form) {
     $defaultPostIMG = new Typecho_Widget_Helper_Form_Element_Text('defaultPostIMG', NULL, NULL, _t('没有设置文章头图的就用这里的图片啦') , _t('http://...'));
     $form->addInput($defaultPostIMG);
 
+    $enableFirstIMG = new Typecho_Widget_Helper_Form_Element_Radio('enableFirstIMG', array(
+        '1' => _t('cool') ,
+        '0' => _t('nope')
+    ) , '1', _t('是否使用文章第一张图片作为文章首图') , _t('当没有设置头图时<br/>默认为开启<br/>p.s 不会选择[photo]短代码中的图片'));
+    $form->addInput($enableFirstIMG);
+
     $headerLOGO = new Typecho_Widget_Helper_Form_Element_Text('headerLOGO', NULL, NULL, _t('头部logo') , _t('如果留空则不显示'));
     $form->addInput($headerLOGO);
 
@@ -754,3 +760,20 @@ function Links($sorts = NULL) {
     }
     echo $link ? $link : '<li>暂无链接</li>';
 }
+
+/**
+* 获取文章首图
+*/
+function getPostImg($archive) {
+    $img = array();
+    //  匹配 img 的 src 的正则表达式
+    preg_match_all("/<img.*?src=\"(.*?)\".*?\/?>/i", $archive->content, $img);
+    //  判断是否匹配到图片
+    if (count($img) > 0 && count($img[0]) > 0) {
+        //  返回图片
+        return $img[1][0];
+    } else {
+        //  如果没有匹配到就返回 false
+        return false;
+    }
+}
diff --git a/index.php b/index.php
index 193300e..634b866 100644
--- a/index.php
+++ b/index.php
@@ -5,7 +5,7 @@
  *
  * @package G
  * @author 季悠然
- * @version 2.4.2
+ * @version 2.4.3
  * @link https://gundam.exia.xyz/
  */
 
diff --git a/post.php b/post.php
index ebc8d23..64d01d9 100644
--- a/post.php
+++ b/post.php
@@ -11,7 +11,7 @@
 ?>
 
 <div id="post">
-	<div id="post-header" style="background-image:url(<?php  $imgurl = $this->fields->imgurl;if($imgurl != ''){echo $imgurl;}else{$this->options->defaultPostIMG();}?>)">
+	<div id="post-header" style="background-image:url(<?php  $imgurl = $this->fields->imgurl;if($imgurl != ''){echo $imgurl;}else{if($this->options->enableFirstIMG == 1 && getPostImg($this)){echo getPostImg($this);}else{$this->options->defaultPostIMG();}}?>)">
 		<div id="post-header-mask">
 			<div id="post-header-content">
 				<h2 id="post-content-title"><?php $this->title();?></h2>