如何讓 PHP 使用 UNIX 套接字 (Joomla) 連接到數據庫

我想讓我的 PHP 應用程序（例如 Joomla）使用 UNIX 套接字連接到本地 mysql 數據庫。

我已經配置了 php.ini：

mysqli.default_socket = /var/run/mysqld/mysqld.sock
mysql.default_socket = /var/run/mysqld/mysqld.sock
pdo_mysql.default_socket=/var/run/mysqld/mysqld.sock

但是在 Joomla 中，我只能將 localhost 或 127.0.0.1 設置為數據庫，是否可以覆蓋它？如何測試實際使用的 UNIX 套接字？

我的 MySQL/MariaDB 配置如下：

[client]
port        = 3306
socket      = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket      = /var/run/mysqld/mysqld.sock
nice        = 0

[mysqld]
user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket      = /var/run/mysqld/mysqld.sock
port        = 3306
basedir     = /usr
datadir     = /var/lib/mysql
tmpdir      = /tmp
lc_messages_dir = /usr/share/mysql
lc_messages = en_US
skip-external-locking
bind-address        = 127.0.0.1
max_connections     = 500
connect_timeout     = 10
wait_timeout        = 600
max_allowed_packet  = 16M
thread_cache_size       = 1000
sort_buffer_size    = 512M
bulk_insert_buffer_size = 16M
tmp_table_size      = 8G
max_heap_table_size = 8G

myisam_recover          = FORCE,BACKUP
key_buffer_size     = 128M
open-files-limit    = 65535
table_open_cache    = 10240
table_open_cache_instances = 8
table-definition-cache = 4096
myisam_sort_buffer_size = 512M
key-cache-segments=8
concurrent_insert   = 2
read_buffer_size    = 32M
read_rnd_buffer_size    = 64M

query_cache_limit       = 96M
query_cache_size        = 128M
query_cache_min_res_unit=7108
query_cache_type        = 1

log_warnings        = 2

slow_query_log_file = /var/log/mysql/mariadb-slow.log
long_query_time = 10
log_slow_verbosity  = query_plan


log_bin         = /var/log/mysql/mariadb-bin
log_bin_index       = /var/log/mysql/mariadb-bin.index
sync_binlog     = 1
expire_logs_days    = 14
max_binlog_size         = 100M

default_storage_engine  = InnoDB
innodb_log_file_size    = 50M
innodb_buffer_pool_size = 6G
innodb_buffer_pool_instances=8
innodb_log_buffer_size  = 32M
innodb_file_per_table   = 1
innodb_concurrency_tickets=5000
innodb_open_files   = 240000
innodb_io_capacity  = 240000
innodb_flush_method = O_DIRECT
innodb-log-files-in-group      = 2
innodb-flush-log-at-trx-commit = 1

[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer      = 512M

!includedir /etc/mysql/conf.d/

127.0.0.1 用於 TCP 套接字。

’localhost’ 用於 Unix 文件系統套接字。

我們可以使用netstat -ln | grep 'mysql'來確定連接方法。並探索選項來強制執行特定類型

shell> mysql --host=127.0.0.1
shell> mysql --protocol=TCP
shell> mysql --host=localhost
shell> mysql --host=localhost --protocol=TCP

連接參數應該是這樣的

$link = mysql_connect(’localhost:/var/run/mysqld/mysqld.sock’, ‘mysql_user’, ‘mysql_password’);

var $host = ':/var/run/mysqld/mysqld.sock';
var $user = 'your_user_db_name';
var $db = 'your_db_name';
var $password = 'your_db_password';

引用自：https://serverfault.com/questions/673854