<?<span>php </span><span>$con</span> = <span>mysql_connect</span>("localhost:3306","root",""<span>); </span><span>if</span> (!<span>$con</span><span>) { </span><span>die</span>('Could not connect: ' . <span>mysql_error</span><span>()); } </span><span>mysql_select_db</span>("test", <span>$con</span><span>); </span><span>$result</span> = <span>mysql_query</span>("SELECT * FROM user"<span>); </span><span>echo</span> "<span><table border='1'> <tr> <th>Username</th> <th>Password</th> </tr>"<span>; </span><span>while</span>(<span>$row</span> = <span>mysql_fetch_array</span>(<span>$result</span><span>)) { </span><span>echo</span> "<tr>"<span>; </span><span>echo</span> "<td>" . <span>$row</span>['username'] . "</td>"<span>; </span><span>echo</span> "<td>" . <span>$row</span>['password'] . "</td>"<span>; </span><span>echo</span> "</tr>"<span>; } </span><span>echo</span> "</table>"<span>; </span><span>mysql_close</span>(<span>$con</span><span>); </span>?>
<?<span>php </span><span>$con</span> = <span>mysql_connect</span>("localhost","root",""<span>); </span><span>if</span> (!<span>$con</span><span>) { </span><span>die</span>('Could not connect: ' . <span>mysql_error</span><span>()); } </span><span>mysql_select_db</span>("test", <span>$con</span><span>); </span><span>mysql_query</span>("DELETE FROM user WHERE username = '<span>$_POST</span>[username]'"<span>); </span><span>mysql_close</span>(<span>$con</span><span>); </span>?>
<?<span>php </span><span>$con</span> = <span>mysql_connect</span>("localhost:3306","root",""<span>); </span><span>if</span> (!<span>$con</span><span>) { </span><span>die</span>('Could not connect: ' . <span>mysql_error</span><span>()); } </span><span>mysql_select_db</span>("test", <span>$con</span><span>); </span><span>$sql</span> = "<span>INSERT INTO user (username,password) VALUES ('</span><span>$_POST</span>[username]','<span>$_POST</span>[password]')"<span>; </span><span>if</span> (!<span>mysql_query</span>(<span>$sql</span>,<span>$con</span><span>)) { </span><span>die</span>('Error: ' . <span>mysql_error</span><span>()); } </span><span>echo</span> "1 record added"<span>; </span><span>mysql_close</span>(<span>$con</span><span>); </span>?>
<?<span>php </span><span>$con</span> = <span>mysql_connect</span>("localhost","root",""<span>); </span><span>if</span> (!<span>$con</span><span>) { </span><span>die</span>('Could not connect: ' . <span>mysql_error</span><span>()); } </span><span>mysql_select_db</span>("test", <span>$con</span><span>); </span><span>mysql_query</span>("UPDATE user SET password = '<span>$_POST</span>[password]' WHERE username = '<span>$_POST</span>[username]'"<span>); </span><span>mysql_close</span>(<span>$con</span><span>); </span>?>
<html> <head> <title>用PHP向数据库中实现简单的增删改查</title> </head> <body> <br /> <h1>Insert:</h1> <form action="insert.php" method="post"><span> username</span>:<input type="name" name="username"/> <br /><span> password</span>:<input type="password" name="password"/> <input type="submit" value="submit"/> </form> <br /><hr /><br /> <h1>Delete</h1> <form action="delete.php" method="post"><span> username</span>:<input type="name" name="username" /> <br /><span> Are you sure</span>?<input type="submit" value="sure" /> </form> <br /><hr /><br /> <h1>Update</h1> <form action="update.php" method="post"><span> username</span>:<input type="name" name="username"/> <br /><span> You want to change your password into</span>:<input type="password" name="password"/> <input type="submit" value="submit"/> </form> <br /><hr /><br /> </body> </html>
Das Obige stellt die Verwendung von PHP zum Implementieren einfacher Hinzufügungen, Löschungen, Änderungen und Suchvorgänge in der Datenbank vor (reiner Code, der verbessert werden muss), einschließlich der relevanten Aspekte. Ich hoffe, dass es für Freunde hilfreich ist, die an PHP-Tutorials interessiert sind.