php实现获取文章内容第一张图片的方法,
本文实例讲述了php实现获取文章内容第一张图片的方法。分享给大家供大家参考。具体分析如下:
采用php获取文章内容的第一张图片方法非常的简单,我们最常用的是使用正则了,感兴趣的朋友可以参考一下下面这段代码。
以下是关于选取文章中第一张图片的代码:
复制代码 代码如下:
$obj=M("News");
$info=$obj->where('id=1')->find();
//方法1*********
$soContent = $info['content'];
$soImages = '~]* />~';
preg_match_all( $soImages, $soContent, $thePics );
$allPics = count($thePics[0]);
preg_match('//i',$thePics[0][0],$match);
dump($thePics);
if( $allPics> 0 ){
echo "";//获取的图片名称
}
else {
echo "没有图片";
}
//**************
$soContent = $info['content'];
$soImages = '~]* />~';
preg_match_all( $soImages, $soContent, $thePics );
$allPics = count($thePics[0]);
dump($thePics);
if( $allPics> 0 ){
echo $thePics[0][0]; //获取的整个Img属性
} else {
echo "没有图片";
}
//**************
$soImages = '~]* />~';
$str=$info['content'];
preg_match_all($soImages,$str,$ereg);//正则表达式把图片的整个都获取出来了
$img=$ereg[0][0];//图片
$p="#src=('|\")(.*)('|\")#isU";//正则表达式
preg_match_all ($p, $img, $img1);
$img_path =$img1[2][0];//获取第一张图片路径
if(!$img_path){
$img_path="images/nopic.jpg";
} //如果新闻中不存在图片,用默认的nopic.jpg替换 */
echo $img_path;
//*************88
$str=$info['content'];
preg_match_all("//isU",$str,$ereg);//正则表达式把图片的整个都获取出来了
$img=$ereg[0][0];//图片
$p="#src=('|\")(.*)('|\")#isU";//正则表达式
preg_match_all ($p, $img, $img1);
$img_path =$img1[2][0];//获取第一张图片路径
if(!$img_path){
$img_path="images/nopic.jpg";
} //如果新闻中不存在图片,用默认的nopic.jpg替换 */
echo $img_path;
希望本文所述对大家的PHP程序设计有所帮助。

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