


PHP reads sql files and imports them into the database (supports phpmyadmin export)_PHP tutorial
php reads sql files and imports them into the database (supports phpmyadmin export) In situations like this where PHP reads SQL files and imports them into the database, the most commonly used method is database backup and restoration. The principle is very simple and can be imported into a .sql file according to the specified format or exported using phpmyadmin. You can use this program to achieve the import.
php tutorial to read sql file and import database tutorial (supports phpmyadmin export)
In situations like this where PHP reads SQL files and imports them into the database, the most commonly used method is database backup and restoration. The principle is very simple and can be imported into a .sql file according to the specified format or exported using phpmyadmin. You can use this program to achieve the import.
*/
function into_sql($file)
{
global $mysql tutorial_host,$mysql_user,$mysql_password,$mysql_db,$mysql_table_prefix,$dbcharset;//Get database configuration information
Mysql_connect($mysql_host,$mysql_user,$mysql_password);
Mysql_select_db($mysql_db);if( mysql_get_server_info() //Return the server version used by link_identifier. If link_identifier is omitted, the last open connection is used.
{
$dbcharset='';//Set the character set. If the mysql version is lower than 4.1, the character set information will not be set
}
if(empty($dbcharset))
{
$dbcharset='gbk';
}
$dbcharset && mysql_query("set names '$dbcharset'");//Set character set
If( mysql_get_server_info() > '5.0' )
{
mysql_query("set sql_mode=''");
}
$file2=file_get_contents($file);
$file2=iconv("utf-8","gbk",$file2);
$file2=str_replace("seo tutorial_",$mysql_table_prefix,$file2);//Replace the database table prefix in the file with the prefix set by the user
$file2=explode("n",$file2);//Read the file content into the array line by line
$c1=count($file2);
for($j=0;$j {
$ck=substr($file2[$j],0,4);//Get the first 4 characters of each line
If( ereg("#",$ck)||ereg("--",$ck) )//Remove comments
{
continue;
}
$arr[]=$file2[$j];//Read the uncommented file contents into the array $arr line by line, each element of the array corresponds to one line
}
$read=implode("n",$arr); //Reorganize the file content into a string (line by line according to the original division)
$sql=str_replace("r",'',$read);//Remove "r (carriage return character)"
$detail=explode(";n",$sql);
//Import the above-organized file contents into the array $detail,
again as a complete sql statement (separated by ; and n) //At this time, each element of the array detail corresponds to a complete sql statement
$count=count($detail);
for($i=0;$i {
$sql=str_replace("r",'',$detail[$i]);//Remove the carriage return
in each line of sql $sql=str_replace("n",'',$sql);//Remove the newline character
$sql=trim($sql);//Remove leading and trailing spaces
//Current $sql
if($sql)
{
If(eregi("create table",$sql))//If the current SQL statement is to create a new table, consider version compatibility and reset the character set
{
//$mysqlv=mysql_get_server_info();
$sql=preg_replace("/default charset=([a-z0-9]+)/is","",$sql);//Remove the original character set setting information
$sql=preg_replace("/type=myisam/is","engine=myisam",$sql);
If($dbcharset)
{
$sql=str_replace("engine=myisam"," engine=myisam default charset=$dbcharset ",$sql);
}
If(mysql_get_server_info() {
$sql=preg_replace("/engine=myisam/is","type=myisam",$sql);//
}
}
mysql_query($sql);
}
}
}
?>

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.

To protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.

Methods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.

Thesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi

In PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.


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