search
Homephp教程php手册php 判断gif图片是否为动画图片

如果利用php来判断就简单了,原理很简单:

识别是否是动画,要检查文件中是否包含chr(0×21).chr(0xff).chr(0x0b).’NETSCAPE2.0‘chr(0×21).chr(0xff)

是gif图片中扩展功能段的标头‘NETSCAPE2.0‘是扩展功能执行的程序名


代码如下。

 代码如下 复制代码

function IsAnimatedGif($filename) 

    $fp = fopen($filename, 'rb'); 
    $filecontent = fread($fp, filesize($filename)); 
    fclose($fp); 
   return strpos($filecontent,chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0') === FALSE?0:1; 

echo IsAnimatedGif("test.gif"); 
?>



Statement
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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!