mysql链接不上,mysqli_connect提示File not found.解决方案


这个一般是由于nginx接收了请求,但是php没有准确响应,nginx返回:File not found.

location ~ \.php$ {
    #root           html;
    fastcgi_pass   127.0.0.1:9005;
    fastcgi_index  index.php;
    #fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param  PHP_ADMIN_VALUE "open_basedir=$document_root/../:/tmp/:/proc/";
    include        fastcgi_params;
}

上面的配置,主要注意需要注释root,然后SCRIPT_FILENAME可以使用非缺省的。

接下来如果操作mysql,像dede人才,明明连不上数据库,但是提示找不到用户名。

如果连不上数据库,直接排查:

使用正常的用户名和密码登录mysql:
mysql -u用户名 -p
输入密码登录成功后输入STATUS:

MariaDB [(none)]> STATUS
--------------
mysql  Ver 15.1 Distrib 10.5.8-MariaDB, for Linux (x86_64) using readline 5.1

Connection id:        11
Current database:
Current user:        sindowww@localhost
SSL:            Not in use
Current pager:        stdout
Using outfile:        ''
Using delimiter:    ;
Server:            MariaDB
Server version:        10.5.8-MariaDB MariaDB Server
Protocol version:    10
Connection:        Localhost via UNIX socket
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    utf8
Conn.  characterset:    utf8
UNIX socket:        /var/lib/mysql/mysql.sock
Uptime:            3 hours 36 min 59 sec

重点是:mysqli.default_socket =/var/lib/mysql/mysql.sock
然后修改php.ini文件,找到
mysql.default_socketmysqli.default_socket
上面两个都设置等于/var/lib/mysql/mysql.sock

保存重启php-fpm,搞定解决!

附原始的链接调测:

<?php
$conn = mysqli_connect('127.0.0.1','数据库用户','数据库密码');
if(!$conn)die('connError:'.mysql_error());
mysqli_select_db('数据库名',$conn);
$result = $conn->query('SELECT md5(123456)');
var_dump($result);
mysql_close($conn);

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