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updating mysql db with PDO php

424 Contributor
is it possible to run an UPDATE sql to update multiple rows in the same way the i insert data into multiple rows? this is my code to insert

Expand|Select|Wrap|Line Numbers
  1. // configuration
  2. $dbtype     = "sql"; 
  3. $dbhost     = "$hostname"; 
  4. $dbname     = "$database"; 
  5. $dbuser     = "$username"; 
  6. $dbpass     = "$password"; 
  8. // database connection 
  9. $conn = new PDO("mysql:host=$dbhost;dbname=$dbname",$dbuser,$dbpass); 
  11. // query 
  12. $sql = "INSERT flashGallery (imageNo,tempID,imageLoc,thumbLoc,imageCap) VALUES (:imageNo,:tempID,:imageLoc,:thumbLoc,:imageCap)"; 
  13. $q = $conn->prepare($sql); 
  15. foreach ($_POST['picT'] as $key => $value)
  16. {
  17.   $q->execute(array(':tempID'=>$random_digit,
  18.                     ':imageNo'=>$value,
  19.                       ':imageLoc'=> $_POST['imageT'][$key],
  20.                     ':thumbLoc'=> $_POST['thumbnailT'][$key], 
  21.                     ':imageCap'=> $_POST['captionT'][$key])); 
  22. }
Aug 26 '09 #1
22 5433
6,050 Recognized Expert Expert

For instance, the following will update all rows that have the user_id 3.

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  1. $sql = "UPDATE `tbl` SET `col1` = 'column 1' WHERE `user_id` = 3;";
Aug 26 '09 #2
424 Contributor
i've tried as much and all i got was an error saying PDO finds it invalid and when i use single quotes for the values to change it just enters :value into the db.

do i have to do it exactly as you wrote it with the backquotes as well?
Aug 26 '09 #3
6,050 Recognized Expert Expert
Can you show me how you're doing it?
Aug 26 '09 #4
8,658 Recognized Expert Moderator Expert
that’s reasonable, because it is treated as string. at least there seems nothing wrong with the SQL code (I use it the same way).

what says the PDO exception exactly?

although it is not necessary, there are the PDOStatement::b indValue() and PDOStatement::b indParam() methods, which give you control over the data type to pass.

those backticks are the standard SQL quotation chars.
Aug 26 '09 #5
424 Contributor
using this code just inputs the last set of values into the db

Expand|Select|Wrap|Line Numbers
  1. // query 
  2. $sql = "UPDATE flashGallery SET imageNo = :imageNo, imageLoc = :imageLoc, thumbLoc = :thumbLoc, imageCap = :imageCap WHERE tempID='{$random_digit}'"; 
  3. $q = $conn->prepare($sql); 
  5. foreach ($_POST['picT'] as $key => $value)
  6. {
  7.   $q->execute(array(':imageNo'=>$value,
  8.                       ':imageLoc'=> $_POST['imageT'][$key],
  9.                     ':thumbLoc'=> $_POST['thumbnailT'][$key], 
  10.                     ':imageCap'=> $_POST['captionT'][$key])); 
  11. }
Aug 26 '09 #6
8,658 Recognized Expert Moderator Expert
because the WHERE condition doesn’t change. you repeatedly overwrite one row.

that doesn’t make sense. mind that you use a Prepared Statement!
Aug 26 '09 #7
424 Contributor
i've changed it for WHERE tempID = :tempID and it still does the same thing
Aug 26 '09 #8
8,658 Recognized Expert Moderator Expert
do you pass a new tempID every time?
Aug 26 '09 #9
424 Contributor
no, the tempID gets created at the start of the template process and its posted to all pages that filter off the 1st page
Aug 26 '09 #10

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