PHP下载excel文件,
1、在下载的过程中不要 输出任何非文件信息，比如 echo log信息。 否则下载后的文件无法打开，提示格式错误或者文件被破坏。
2、 输出的excel格式一定要和后缀名保存一直，否也会提示格式错误或者文件被破坏
代码如下:
if (file_exists(CACHE_PATH . $file_name)){
//$this->logger->error('file realpath:'.realpath(CACHE_PATH . $file_name));
header( 'Pragma: public' );
header( 'Expires: 0' );
header( 'Content-Encoding: none' );
header( 'Cache-Control: must-revalidate,post-check=0,pre-check=0' );
header( 'Cache-Control: public' );
header( 'Content-Type: application/vnd.ms-excel');
header( 'Content-Description: File Transfer' );
header( 'Content-Disposition: attachment; filename=' . $file_name );
header( 'Content-Transfer-Encoding: binary' );
header( 'Content-Length: ' . filesize ( CACHE_PATH . $file_name ) );
readfile ( CACHE_PATH . $file_name );
} else {
$this->logger->error('export model :'.$id.' 错误：未生产文件');
echo '';
}
//$this->logger->error('file realpath:'.realpath(CACHE_PATH . $file_name));
header( 'Pragma: public' );
header( 'Expires: 0' );
header( 'Content-Encoding: none' );
header( 'Cache-Control: must-revalidate,post-check=0,pre-check=0' );
header( 'Cache-Control: public' );
header( 'Content-Type: application/vnd.ms-excel');
header( 'Content-Description: File Transfer' );
header( 'Content-Disposition: attachment; filename=' . $file_name );
header( 'Content-Transfer-Encoding: binary' );
header( 'Content-Length: ' . filesize ( CACHE_PATH . $file_name ) );
readfile ( CACHE_PATH . $file_name );
} else {
$this->logger->error('export model :'.$id.' 错误：未生产文件');
echo '';
}
