PHP实现一个文件上传的功能还是比较容易的,这里简单记录一下自己使用方法。
这里是一次接收多个文件上传的脚本upload.php,如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
// 实现多个文件上传并保存的后端
//设置编码为UTF-8,以避免中文乱码
header('Content-Type:text/html;charset=utf-8');
//获取多个文件的信息,注意:这里的键名不包含[]
$fileArray = $_FILES['upload_file'];
$upload_dir = 'img/'; //保存上传文件的目录
foreach ( $fileArray['error'] as $key => $error ) {
if ( $error == UPLOAD_ERR_OK ) { //PHP常量UPLOAD_ERR_OK值为0,表示文件上传成功
$temp_name = $fileArray['tmp_name'][$key];
$file_name = $fileArray['name'][$key];
move_uploaded_file($temp_name, $upload_dir.$file_name);
echo '上传[文件'.$key.':'.$file_name.']成功!';
}else {
echo '上传[文件'.$key.':'.$file_name.']失败!';
}
}
?> |
关于上传文件的大小限制,对于我目前的nginx + php-fpm,有nginx和php的两层限制。
nignx的限制,目前默认是1MB的请求body,可以在配置文件/etc/nginx/nginx.conf中来调整:
1 2 3 4 5 6 7 | http { include /etc/nginx/mime.types; default_type application/octet-stream; client_max_body_size 10M; #设置最大的body size ... } |
如果超过client_max_body_size的限制,nginx会返回413响应码表示“Request Entity Too Large ”。
PHP对post请求内容的大小限制:
在/etc/php.ini文件中,有如下内容:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | ; Maximum amount of time each script may spend parsing request data. It's a good ; idea to limit this time on productions servers in order to eliminate unexpectedly ; long running scripts. ; http://www.php.net/manual/en/info.configuration.php#ini.max-input-time max_input_time = 60 ; Maximum size of POST data that PHP will accept. ; http://www.php.net/manual/en/ini.core.php#ini.post-max-size post_max_size = 10M ; Whether to allow HTTP file uploads. ; http://www.php.net/manual/en/ini.core.php#ini.file-uploads file_uploads = On ; Maximum allowed size for uploaded files. ; http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize upload_max_filesize = 10M |
参考资料:
http://www.365mini.com/page/php-upload-file.htm
http://www.php.net/manual/zh/features.file-upload.php
http://forum.nginx.org/read.php?2,139769,139769#msg-139769
Original article: PHP实现文件上传功能
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