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PHP获取网站中各文章的第一张图片的代码示例,

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Release: 2016-06-12 16:30:15
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PHP获取网站中各文章的第一张图片的代码示例,

<&#63;php 
$temp=mt_rand(1,4); 
$pattern="/<[img|IMG].*&#63;src=[\'|\"](.*&#63;(&#63;:[\.gif|\.jpg|\.png]))[\'|\"].*&#63;[\/]&#63;>/"; 
$content = $article->Content; //文章内容 
preg_match_all($pattern,$content,$matchContent); 
if(isset($matchContent[1][0])){ 
  $temp=$matchContent[1][0]; 
}else{ 
  $temp="images/random/$temp.jpg";//需要在相应位置放置4张jpg的文件,名称为1,2,3,4 
} 
 
&#63;> 
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以上代码默认调用文章首张图片,当文章没有图片的时候,随机调用主题style/images/random/下的1.jpg、2.jpg、3.jpg、4.jpg图片。如果不想调用随机图片,可以修改一下:

<&#63;php 
$pattern="/<[img|IMG].*&#63;src=[\'|\"](.*&#63;(&#63;:[\.gif|\.jpg|\.png]))[\'|\"].*&#63;[\/]&#63;>/"; 
$content = $article->Content; //文章内容 
preg_match_all($pattern,$content,$matchContent); 
if(isset($matchContent[1][0])){ 
  $temp=$matchContent[1][0]; 
}else{ 
  $temp="./images/no-image.jpg";//在相应位置放置一张命名为no-image的jpg图片 
} 
 
&#63;> 
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调用文章首张图片,如果文章没有图片就调用默认图片no-image.jpg

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