Undefined Variable PHP + MySQL -
this question has answer here:
i know stackoverflow disapproves of repeat questions, bear me have scanned many similar questions without finding specific resolutions me. (mostly mention things avoiding database insertions)
i encounter these error messages:
here db connection success notice: undefined variable: firstname in c:\xampp\htdocs\practice_connection_app\submit.php on line 10 notice: undefined variable: lastname in c:\xampp\htdocs\practice_connection_app\submit.php on line 10 notice: undefined variable: conn in c:\xampp\htdocs\practice_connection_app\submit.php on line 11 fatal error: call member function exec() on null in c:\xampp\htdocs\practice_connection_app\submit.php on line 11 the first result shows have connected database made using phpmyadmin.
here relevant code (my html submission page calls on php action):
<!doctype html> <html> <head> <meta charset="utf-8"> <title>student info</title> </head> <body> <br> enter first name , last name in corresponding boxes. <br> <form action="submit.php" method="post"> first: <input type="text" name="firstname"/> <br> last: <input type="text" name="lastname"/> <br> <input type="submit"> </form> </body> </html> the database connection (i think)
<?php echo 'here'; $dsn = 'mysql:host=localhost;dbname=practice_students'; $username = 'test_usr'; $password = 'pa55word'; try { $db = new pdo($dsn, $username, $password); echo 'db connection success'; } catch (pdoexception $e) { $error_message = $e->getmessage(); include('database_error.php'); exit(); } ?> and php submit page
<?php echo 'here '; $dsn = 'mysql:host=localhost;dbname=practice_students'; try { $db = new pdo($dsn); echo 'db connection success'; $sql = "insert people (firstname, lastname) values ('$firstname', '$lastname')"; $conn->exec($sql); echo "now know name! hi," . " " . $firstname . " " . $lastname; } catch (pdoexception $e) { $error_message = $e->getmessage(); include('database_error.php'); exit(); } ?> i understand may need 'cleaning up' avoid database insertions, know how can ensure submissions going database , can returned.
thanks in advance!
not sure manual ahve been reading end code....
you need access post variables (using $_post['firstname']) after sanitizing them of course....
edit:
to access posted variable, can following:
$firstname = $_post['firstname']; but need santization going on, use php's filter_var:
$firstname = filter_var($_post['firstname'], filter_sanitize_string); though, can better that, , strict in allow through filters / sanitizers... please go investigate part after code "working" :)
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