如何判断一个文件是否为真实的GIF图片？
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本文共计87个文字，预计阅读时间需要1分钟。
判断是否为真实GIF图.txtfunction check_gif($path) { $fh=fopen($path, 'rb'); $str=fread($fh, 1024); // 读取1024个字节 fclose($fh); return strpos($str, chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0')===FALSE ? 0 : 1;}echo check_gif('g‘');
function check_gif ($path) { $fh = fopen($path, 'rb'); $str = fread($fh, 1024); //读取1024个字节 fclose($fh); return strpos($str,chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0') === FALSE?0:1; } echo check_gif('gif.gif');
本文共计87个文字，预计阅读时间需要1分钟。
判断是否为真实GIF图.txtfunction check_gif($path) { $fh=fopen($path, 'rb'); $str=fread($fh, 1024); // 读取1024个字节 fclose($fh); return strpos($str, chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0')===FALSE ? 0 : 1;}echo check_gif('g‘');
function check_gif ($path) { $fh = fopen($path, 'rb'); $str = fread($fh, 1024); //读取1024个字节 fclose($fh); return strpos($str,chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0') === FALSE?0:1; } echo check_gif('gif.gif');