php insert data into mysql
<html> <head> <title>Add New Record in MySQL Database</title> </head> <body> <?php if(isset($_POST['add'])) { $dbhost = 'localhost:3306'; $dbuser = 'root'; $dbpass = 'root'; $conn = mysql_connect($dbhost, $dbuser, $dbpass); if(! $conn ) { die('Could not connect to mysql'); } if(! get_magic_quotes_gpc() ) { $emp_name = addslashes ($_POST['emp_name']); $emp_address = addslashes ($_POST['emp_address']); } else { $emp_name = $_POST['emp_name']; $emp_address = $_POST['emp_address']; } $emp_salary = $_POST['emp_salary']; $sql = "INSERT INTO employee ". "(emp_id, emp_name,emp_address, emp_salary) ". "VALUES(1, '$emp_name','$emp_address',$emp_salary)"; mysql_select_db('test_db'); $retval = mysql_query( $sql, $conn ); if(! $retval ) { die('Could not enter data: '); } echo "Entered data successfully\n"; mysql_close($conn); } else { ?> <form method="post" action="<?php $_PHP_SELF ?>"> <table width="400" border="0" cellspacing="1" cellpadding="2"> <tr> <td width="100">Employee Name</td> <td><input name="emp_name" type="text" id="emp_name"></td> </tr> <tr> <td width="100">Employee Address</td> <td><input name="emp_address" type="text" id="emp_address"></td> </tr> <tr> <td width="100">Employee Salary</td> <td><input name="emp_salary" type="text" id="emp_salary"></td> </tr> <tr> <td width="100"> </td> <td> </td> </tr> <tr> <td width="100"> </td> <td> <input name="add" type="submit" id="add" value="Add Employee"> </td> </tr> </table> </form> <?php } ?> </body> </html>

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita

ToretrievedatafromaPHPsession,startthesessionwithsession_start()andaccessvariablesinthe$_SESSIONarray.Forexample:1)Startthesession:session_start().2)Retrievedata:$username=$_SESSION['username'];echo"Welcome,".$username;.Sessionsareserver-si

The steps to build an efficient shopping cart system using sessions include: 1) Understand the definition and function of the session. The session is a server-side storage mechanism used to maintain user status across requests; 2) Implement basic session management, such as adding products to the shopping cart; 3) Expand to advanced usage, supporting product quantity management and deletion; 4) Optimize performance and security, by persisting session data and using secure session identifiers.

The article explains how to create, implement, and use interfaces in PHP, focusing on their benefits for code organization and maintainability.

The article discusses the differences between crypt() and password_hash() in PHP for password hashing, focusing on their implementation, security, and suitability for modern web applications.

Article discusses preventing Cross-Site Scripting (XSS) in PHP through input validation, output encoding, and using tools like OWASP ESAPI and HTML Purifier.


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