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最近我更新了PHP版本,使用mysql_connect()函數會(huì )報錯:
PHP Warning: mysql_connect(): mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWord('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file in /root/test.php on line 3
原因:
MySQL 5.0 為了和4.1之前的版本兼容,用戶(hù)密碼(mysql數據庫的user表password字段)保存的是密碼的16位hash值,而PHP5.3后的 mysql驅動(dòng)使用41位的密碼hash值進(jìn)行用戶(hù)驗證,所以需要讓mysql中保存用戶(hù)密碼的41位hash值,但配置文件中 old_passwords=1的話(huà),password()函數只能返回16位hash值。
解決方法
SET old_passwords = 0;
update mysql.user SET PASSWORD = PASSWORD( 'phpddt.com' ) where User = 'root' LIMIT 1 ;
select LENGTH( PASSWORD ) from mysql.user where User = 'root';
FLUSH PRIVILEGES ;
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