pdo

问题 This question already has answers here : Why are certain types of prepared queries using PDO in PHP with MySQL slow? (3 answers) Closed last year . I am running a PDO prepared statement to select from a table of around ~6k rows. This particular query ends up returning all of the rows due to the WHERE statement which has ~5k pIds. The table has an index on the pId column as well. SELECT * FROM table_a WHERE pId in (?, ? ,? ....) This query takes 4.5 seconds to run in php and when run in the

问题 I am new to PDO and I was wondering if there was an equivalent to a mysql statement that checks if a parameter is not null such as: SELECT * FROM table WHERE param IS NOT NULL I tried this: $pdo->prepare('SELECT * FROM ' . $tablename . ' WHERE ' . $field . ' = :' . $field . 'AND param IS NOT NULL'); without any success. I also looked on the web, but did not find anything relevan, can anyone help please ? 回答1: You can use any query in pdo that you could use in mysql directly but your way of

问题 I wish to let a user add records to an empty database table. As a matter of fact I have a database and an empty table which has to be filled using a form the first file handles the db connection (I use PDO )returns an empty page and a link named add which goes to a form <?php error_reporting(-1); ini_set('display_errors', 'On'); ?> <?php $servername = "localhost"; $username = "xxx"; $password = "xxx"; $dbname = "xxxx"; try { $dbh = new PDO("mysql:host=$servername;dbname=$dbname", $username,

问题 I'm trying to add a record, and at the same time return the id of that record added. I read it's possible to do it with a RETURNING clause. $stmt->prepare("INSERT INTO tablename (field1, field2) VALUES (:value1, :value2) RETURNING id"); but the insertion fails when I add RETURNING. There is an auto-incremented field called id in the table being added to. Can someone see anything wrong with my syntax? or maybe PDO does not support RETURNING ? 回答1: I don't think it has anything to do with PDO

问题 I have a problem with PDO, and I see absolutely no where he come. I can not question my MySQL database. Just to test I used the following code (having quite sour previously configured the parameters for the connection: try { $dbh= new PDO('mysql:host=serverName;dbname=Mydatabase','user','password'); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); } catch (Exception $e) { die('Erreur : ' . $e->getMessage()); } var_dump($dbh); // gives : object(PDO)#1 (0) { } $res=$dbh->query(

问题 I have a problem with PDO, and I see absolutely no where he come. I can not question my MySQL database. Just to test I used the following code (having quite sour previously configured the parameters for the connection: try { $dbh= new PDO('mysql:host=serverName;dbname=Mydatabase','user','password'); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); } catch (Exception $e) { die('Erreur : ' . $e->getMessage()); } var_dump($dbh); // gives : object(PDO)#1 (0) { } $res=$dbh->query(

问题 I have already tried checking for related post but it doesn't seem to help me fix my problem at hand. I am trying to create an page for appointments where data are saved in the database. however, these two error message kept appearing on my window: Notice: Undefined index: comments in C:\xampp\htdocs\db\connect2.php on line 29 Error: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'comments' cannot be null here is the code php <form name="appointments" action="" method="POST">

问题 This question already has answers here : UTF-8 all the way through (15 answers) Closed 5 years ago . I am using PHP 5.5 and when I attempt to insert a UTF-8 character in the MySQL database PDO cuts it off at the first non-ASCII character. I have set my connection to be: (DB_TYPE.':host='.DB_HOST.';dbname='.DB_NAME.';charset=utf8', DB_USER, DB_PASS, array(PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING)) I have tried the SET NAMES that everyone posts

问题 This question already has answers here : UTF-8 all the way through (15 answers) Closed 5 years ago . I am using PHP 5.5 and when I attempt to insert a UTF-8 character in the MySQL database PDO cuts it off at the first non-ASCII character. I have set my connection to be: (DB_TYPE.':host='.DB_HOST.';dbname='.DB_NAME.';charset=utf8', DB_USER, DB_PASS, array(PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING)) I have tried the SET NAMES that everyone posts

问题 <?php $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); /* Fetch all of the remaining rows in the result set */ print("Fetch all of the remaining rows in the result set:\n"); $result = $sth->fetchAll(); print_r($result); ?> The above example will fetch all of the remaining rows in the result set and output something similar to: Array ( [0] => Array ( [NAME] => pear [0] => pear [COLOUR] => green [1] => green ) [1] => Array ( [NAME] => watermelon [0] => watermelon [COLOUR