I have Apache (with PHP) and MySQL installed and running on my Raspberry Pi. I've done some simple tests with PHP, and it seems to be working. And MySQL is working perfectly from the terminal, and even another computer.
I made this PHP file:
<?php
echo("Connecting");
$connection = new mysqli("127.0.0.1", "admin", "password", "test");
if ($connection->connect_error) {
die("Connection error");
}
echo("Connection successful");
?>
Yet when I go to this page in my web browser, all I see is "Connecting". If I comment out the connection command, I see "Connecting Connection successful" in the browser.
It seems as if the PHP code stops running or hangs at the connection command.
Any ideas why I'm having this strange behavior?
Try adding these lines at the top: error_reporting(E_ALL);
ini_set('display_errors',1);
I hope You should do following
if ($connection->connect_error) {
echo "Connection error";
}else{
echo "Connection successful";
}
Try this instead
<?php
$link = mysqli_connect("127.0.0.1", "admin", "password", "test");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
?>
Related
I have been trying to connect my PHP file to MySQL database for a while, now I'm using WAMP server and encountering error 1045, I have also setup a password and tried various settings given on net.
this is the scenario
<?php
$link = mysqli_connect("127.0.0.1", "root", "password", "registration");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
?>
here is the code I'm running, registration is the database,I have created it using phpmyadmin
<?php
$link = mysqli_connect("127.0.0.1", "root", "", "registration");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
?>
I have a file login.php to try to connect to my database.
I put the file login.ph inside the server folder and started the server.
Then i call the file in the browser and it shows a blank page. It does not respond even if i change the values of the database to an incorrect value.
I don't know if the error is inside the code or if it is another problem.
Thanks.
login.php:
<?php
$username = $_GET['fname'];
$password = $_GET['fpass'];
$con=mysqli_connect("localhost","user","pass","db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$qz = "SELECT contact_id FROM contacts" ;
$qz = str_replace("\'","",$qz);
$result = mysqli_query($con,$qz);
while($row = mysqli_fetch_array($result))
{
echo $row['contact_id'];
}
mysqli_close($con);
?>
You must check $con variable that you have set with the result of the connection:
if (!$con) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
Do you have web server (say apache) installed and running on your server? You have to. Then put your file on the web server folder (say /var/www/html) and test in the browser.
I am trying to get my PHP pages to connection to a remote server hosting the MySQL database. I can connect via the command line just fine with the same username and password. Below is a simple test file I created. The only thing I've done to the code is remove the password, but I know that's not the issue. Like I said I can connect via the CLI. This is a Linux install. When viewed from the web browser, all I get is an error 500 page. If I comment out the mysqli statement, the page displays the Connected successfully.
<?php
$servername = "12.0.1.170";
$username = "jason";
$password = "";
// Create connection
$conn = mysqli_connect($servername, $username, $password);
// Check connection
if (!$conn) {
/ die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully";
?>
Per the php documentation for mysqli_connect()
$link = mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
Your code appears to be lacking all four parameters required.
You have:
$conn = mysqli_connect($servername, $username, $password);
Perhaps try:
$conn = mysqli_connect($servername, $username, $password, $database);
with a $database='db_name'; value added into your variables section.
There are two possible issues with remote mysql connection:
1. Firewall of the server: You must enable incoming connection on port (for. e.g. 3306).
2. User in mysql: You must have a user created (for e.g. jason in this case)
Try connecting this way
$con = mysqli_connect('localhost','root','','db_name');
if($con)
echo "hell yeah its connected";
else
echo "i m boned"
How can I catch and ignore errors when connecting to a database and display a simple text message instead?
My connection looks like this:
$connection = mysqli_connect($dbhost, $dbuser, $dbpw, $dbname);
If the connection fails I want it simply to echo "Error connecting to the database" instead of the big error box.
EDIT:
Although error_reporting(0) did work, what worked better was just putting '#' in front of mysqli_connect:
$connection = #mysqli_connect($dbhost, $dbuser, $dbpw, $dbname);
if (!$connection) {
$connection_status = 'Connection to database failed';
} else {
$connection_status = null;
}
?>
<?php echo $connection_status; ?>
Taken from the documentation of mysqli_connect:
Examples
Example #1 mysqli_connect() example
<?php
$link = mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
?>
mysqli_connect:
$connection = mysqli_connect($dbhost, $dbuser, $dbpw, $dbname);
if (!$connection)
{
error_reporting(0);
die("Error: Unable to connect to MySQL." . PHP_EOL);
}
To disable "big error boxes" (I assume standart messages?), write error_reporting(0); above this.
You may set your custom handler for errors
register_shutdown_function("shutdownHandler");
function shutdownHandler()
{
if (!is_null($e = error_get_last())).
{
echo $e['message'];
}
}
I have a script that connects to a MySQL database in localhost, when I run it from the console it runs just fine, but when I run it from the web, I get this:
Warning: mysqli_connect(): (HY000/2002): No such file or directory in /var/www/html/tests/mysql.php on line 3
Error: Unable to connect to MySQL. Debugging errno: 2002 Debugging error: No such file or directory
I checked my php.ini file and it has the correct location of mysql.sock, the file exist, but php won't connect via web.
Also, I have Fedora Linux with Firewall disabled as well as SELinux, so I have no idea what can be causing this.
This is the test code I'm using:
<?php
$link = mysqli_connect("localhost", "root", "password", "my_db");
if (!$link) {
echo "Error: Unable to connect to MySQL." . PHP_EOL;
echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
exit;
}
echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
mysqli_close($link);
?>
Any ideas?