From my PHP Skript I try to execute a query at a MS-SQL Database.
The connection can be established, but I got everytime error: "Segmentation fault".
What is the cause for this error?
the line which cause the error ist the FETCH statement!!
My PHP Code:
<?PHP
try
{
$db = new PDO("odbc:ms-sql","<user>","<passwort>");
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo"Connection established";
echo"\n";
}
catch (PDOException $Exception)
{
echo " No connection established.";
echo"\n";
echo $Exception->getMessage();
exit(UNKNOWN);
}
try
{
$query_result = $db->query(select * from dbo.TEST where MAKE_DATE LIKE '%2014-08%');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(Exception $Exceptionsql)
{
echo " SQL-Query failed. \n\n";
echo $Exceptionsql->getMessage();
exit(UNKNOWN);
}
$result = $query_result->fetch(PDO::FETCH_ASSOC);
//close DB connection
$db = null;
var_dump($result);
?>
I guess that the string to execute the query is wrong.
I would be grateful if somebody could help me.
Related
I have a download script which get id of file and search in database and find it's name. But when I include my db connection the files get corrupted on download.
when I comment my db connection and give file name manually file downloading work fine.
I test my db connection and there wasn't any excpetion or any html output , what do you think my problem is?
<?php
session_start();
try{
$db= new PDO("mysql:host=localhost;dbname=dbname","user","pass");
$db->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->setAttribute( PDO::ATTR_EMULATE_PREPARES, false );
$db->exec("SET NAMES 'utf8'");
}catch (Exception $e){
//echo "something wrong in db.php";
echo $e->getMessage();
exit;
}
?>
I run my code on windows server IIS, if it does matter
Just try with this code..
error_reporting(E_ALL);
ini_set('display_errors','1');
$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';
try {
$dbh = new PDO($dsn, $user, $password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
It will return your error.
after few days struggling and headache finaly problem resolved by deleting try catch block
I'm running the following very basic PDO:MySql connection:
<?php
$host = '127.0.0.1:8888';
$db = 'communities';
$user = 'root';
$pass = 'yY5MF)q/DCzc';
// Create connection
try {
$conn = new PDO('mysqli:host=$host;dbname=$db', $user, $pass);
foreach($conn->query('SELECT * from city_detail') as $row) {
print_r($row);
}
$conn = null;
// Check connection
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
echo "Connected successfully";
?>
I've modified php.ini to allow for extension=php_pdo_mysql.dll with no effect. Is there something else that I'm missing. I am using PHP7.0.3. The error message output is Error!: could not find driver Kudos!
You need to use double quotes to get variable data inside string:
$conn = new PDO("mysqli:host=$host;dbname=$db", $user, $pass);
The problem was using msqli instead of mysql.
I have a mac with OSX 10.8.4. I have installed my localhost and it works just fine. I have made a php script, from where I would like to connect MySQL workbench database to. My apache tomcat server runs, and also mysql on the computer, and I use XAMPP. This is my code:
<?php
// Establish connection to DB using PDO
try {
$pdo = new PDO('127.0.0.1:3306', 'root', '');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->exec('SET NAMES "utf8"');
echo "Connected!";
} catch (PDOException $e) {
$error = 'ERROR - Connection to DB failed: ' . $e->getMessage();
echo "Connection failed";
exit();
}
I have tried this script to connect to a remote mysql server, where it works fine, but I cannot use it for my localhost. I also tried just to put in localhost in new PDO, but still the same. Does anybody have a clue to what is wrong?
Best Regards
Mads
You'll have an easier time knowing what's not working if you echo the exception being thrown.
Your code
} catch (PDOException $e) {
$error = 'ERROR - Connection to DB failed: ' . $e->getMessage();
echo "Connection failed";
}
doesn't actually print the exception! Try this instead:
} catch (PDOException $e) {
$error = 'ERROR - Connection to DB failed: ' . $e->getMessage();
echo $error;
}
That will at least give you some helpful debugging info.
I am starting to use PDO and I successfully connected to MySQL using PDO. However, when I try to SELECT stuff from my DB, nothing happens. Nothing is echoed. (even though I have records in that table, and the column username exists) No error in my PHP log.
I am using MAMP and all PDO components seem to be working in phpinfo() (since I was able to connect to db in the first place)
Please let me know what could have gone wrong. Thanks a lot
<?php
try
{
$connection = new PDO('mysql:host=localhost;dbname:my_db','my_username',
'xxxxxxx');
$stmt=$connection->prepare("SELECT * FROM users");
$stmt->execute();
while ($row=$stmt->fetch(PDO::FETCH_OBJ)){
echo $row->username;
}
}
catch(Exception $e)
{
echo "There was an error connecting to the database";
}
?>
You need to tell PDO that you want it to throw exceptions:
$connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
Following your comment below, it is apparent that your DSN is incorrect. It should be:
$connection = new PDO('mysql:host=localhost;dbname=my_db','my_username','xxxxxxx');
Note that the syntax is dbname= rather than dbname: (which you had originally).
First, get your query out of your PDO connection segment...
<?php
try
{
$connection = new PDO('mysql:host=localhost;dbname:my_db','my_username',
'xxxxxxx');
}
catch(Exception $e)
{
echo "There was an error connecting to the database";
}
?>
Then, do it.
<?php
$SQL = 'SELECT * FROM users';
foreach($connection->query($SQL) as $row){
print $row['username'] . "\n".'<br />';
}
?>
Why not ask PHP?
catch(Exception $e)
{
die($e);
}
Looks like your either don't have data in that table or have an error:
Try to add this code after $stmt->execute();:
$arr = $sth->errorInfo();
print_r($arr);
I have a problem with my database! Here is my code:
<?php
$host = "/homes/49/jc192699/public_html/dbase";
$database = "EduPro.db";
$dbhandle = new PDO("sqlite:".$host.$database);
if (!$dbhandle){
echo "Error connecting to database.\n";
}
else{
echo "<br>";
echo "<br>";
echo "Database connection successful!";
}
mysql_select_db($database);
?>
The problem is that it's saying "Database connection successful!" No matter what I do, if I type the address in wrong, it still says successful, when I renamed the database to a database that doesn't exist, it still says successful. I can't see what the problem is here?
If anybody could help me out it would be GREATLY appreciated!
Thank you!
For starters, the PDO constructor throws an exception if there is an error. It does not return false. Check for errors using
try {
$dbhandle = new PDO("sqlite:".$host.$database);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
Secondly, as you are using SQLite, provided your dbase directory is writeable by the script, your connection attempt will create an empty database.
Try this:
<?php
try {
/*** connect to SQLite database ***/
$dbh = new PDO("sqlite:/path/to/database.sdb");
}
catch(PDOException $e)
{
/*** real error message prints here ***/
echo $e->getMessage();
}
?>
This is directly taken from here:
http://www.phpro.org/tutorials/Introduction-to-PHP-PDO.html#4.2