Home > php教程 > php手册 > 用javascript+PHP随机显示图片

用javascript+PHP随机显示图片

WBOY
Release: 2016-06-21 09:07:52
Original
1001 people have browsed it

随机|显示

想必你会用javascript随机显示图片。但如果图片的资料(比如链接)是经常变化,或是由用户修改、增加的,怎么办?我这里有个办法。
把图片的资料(如名称、地址、链接等)放在一个TXT文件里(如有MYSQL更好,没有也罢)。HTML文件中由javascript调用PHP程序,PHP程序随机读取图片资料。程序见下:
假设有TP.TXT内容如下:(各字段分别代表‘图片名称’、‘链接位置’、‘图片位置’,字段间为TAB)
OSO www.oso.com.cn www.oso.com.cn/image/logo.gif
163 www.163.com image.163.com/images/logo.gif
sohu www.sohu.com www.sohu.com/image/logo.gif

readrand.php(此程序实际上是生成一句javascript语言)

$arrayall=file("tp.txt");读出tp.txt内容到数组
$arrays=count($arrayall);
if ($arrays==1){//because rand(0,0) is wrong
$selectrand=0;
}else{
srand((double)microtime()*1000000);//设定随机数种子
$selectrand=rand(0,$arrays-1);
}
$exstr=explode(chr(9),$arrayall[$selectrand]);//从全部中随机取出一个并分割
?>
document.write('<? echo $exstr[0];?>');


HTML文件





(你可以把scripty放到你需要的位置,并可以加入setTimeout()函数以实现定时刷新)



Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template