Php cannot connect to mysql, But mysql command line operations are normal _ MySQL

A solution for php to connect to mysql but the mysql command line operation is normal failure: the php website fails to connect to mysql, but the command line can be used to log on and operate normally through the mysql command.
Solution:
1. log on to mysql under the command line and execute the following command:
Show variables like 'socket ';
After the command is executed, the Echo is similar to the following:

"Variable_name" "Value"
"Socket" "/home/mysql/data/mysql. sock"
2. edit php. ini, find mysql. default_socket configuration item. the default value is generally null (use the sock path set when you edit Mysql). add this item to "/home/mysql/data/mysql" in the preceding echo. sock ":

; Default socket name for local MySQL connects. If empty, uses the built-in
; MySQL ULTS ults.
Mysql. default_socket =/home/mysql/data/mysql. sock
3. restart php.