laraval 放到 nginx 服务器上之后，运行报 500 错误

这是我的nginx配置

`server {
listen 80;
server_name mxsy2305.6655.la;
charset utf-8;
root /ynw/zuopinji/public;

location / {
    try_files $uri $uri/ /index.php$is_args$query_string;
    index  index.html index.htm index.php;

}

error_page   500 502 503 504  /50x.html;
location = /50x.html {
    root   html;
}

location ~ .*.(svn|git|cvs) {
    return 404;
}

location ~ \.php($|/) {
    try_files $uri =404;
    fastcgi_pass   127.0.0.1:9000;
    fastcgi_index  index.php;
    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_param  PHP_VALUE  "open_basedir=$document_root:/tmp/:/proc/";
    fastcgi_param  SCRIPT_FILENAME  $document_root/$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    include fastcgi_params;
}

location ~ ^/(images|javascript|js|css|flash|media|static)/ {
    expires 30d;
}

}`