What is Pconnect?
What is Pconnect?
The Pconnect function uses minimal resources because the mysql_pconnect() function is already connected with your database connection; it does need to have a connection established with the database every time the page is loaded, for when you want to persistent a connection.
What is persistent MySQL connection?
The idea behind persistent connections is that a connection between a client process and a database can be reused by a client process, rather than being created and destroyed multiple times.
What is the difference between Mysql_connect and mysql_pconnect?
Mysql_connect() opens a new connection to the database while mysql_pconnect() opens a persistent connection to the database. This means that each time the page is loaded mysql_pconnect() does not open the database. Mysql_close() cannot be used to close the persistent connection.
How do I turn off persistent connections in MySQL?
To disable persistent connections, just use mysql_connect() instead. You can also, very simply, set mysql. allow_persistent = Off in your php. ini file.
How do I use MySQLPconnect?
PHP mysql_pconnect() Function
- This function will try to find a connection that’s already open, with the same host, username and password.
- The connection will not be closed when the execution of the script ends (mysql_close() will not close connection opened by mysql_pconnect()).
What is Mysql_real_escape_string?
Description. string mysql_real_escape_string(string unescaped_string, Escapes special characters in the unescaped_string , taking into account the current character set of the connection so that it is safe to place it in a mysql_query . If binary data is to be inserted, this function must be used.
Should I keep database connection open?
Absolutely it is safe to do this. This is how client-server applications work. If you are using a three-tier application, the application server will keep a pool of connections open anyway.
Does PHP use persistent connection?
Persistent connections were added to PHP during times of MySQL 3.22/3.23 when MySQL was simple enough so you could recycle connections easily without any problems. In later versions number of problems however arose – If you recycle connection which has uncommitted transactions you run into trouble.
What is Pconnect in CodeIgniter?
hostname – The hostname of your database server. This permits multiple CodeIgniter installations to share one database. pconnect – TRUE/FALSE (boolean) – Whether to use a persistent connection. db_debug – TRUE/FALSE (boolean) – Whether database errors should be displayed.
Why is MySQL CPU so high?
High CPU almost always means inefficient queries. Such are usually solved via better indexing (especially ‘composite’) and/or reformulating the query.
Does mysql_real_escape_string prevent SQL injection?
3 Answers. mysql_real_escape_string ALONE can prevent nothing. Moreover, this function has nothing to do with injections at all. Whenever you need escaping, you need it despite of “security”, but just because it is required by SQL syntax.
