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Solutions to the problem that PHP cannot open Excel after downloading: 1. Do not output any non-file information during the download process; 2. The output Excel format must be consistent with the suffix name saved; 3. Check whether the file is downloaded. Just be complete.
The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer
php download excel file:
1. Do not output any non-file information during the download process, such as echo log information.
Otherwise, the downloaded file cannot be opened, indicating a format error or the file is damaged.
2. The output excel format must be saved with the suffix name, otherwise it will prompt a format error or the file is damaged
The code is as follows:
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 '<script>alert(\'export error, file not
exists！\')</script>';
}3. File error , please check whether the file is downloaded completely.
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