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.
Related
I'm new to PHP.I have been trying to get data from Database and convert them to json . However when I open the chrome console. It says 500 : Internal Server Error.
Here is my PHP Code
<?php
function get_data(){
$link = mysqli_connect("localhost:8889","root2","root","EMPLOYEE");
if (!$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;
$sql = "SELECT * FROM people";
$result = mysqli_query($link,$sql);
$json_array = array();
while($row = mysql_fetch_array($result))
{
$json_array[] = array(
'id' => $row["id"],
'name' => $row["name"]
);
}
$json_array['name'] = "sarath";
$json_array['age'] = 19;
#echo $json_array;
return json_encode($json_array);
}
echo '<pre>';
print_r(get_data());
echo '</pre>';
?>
I get the following output at http://localhost:8888/peo.php. The json_array was not getting printed.
<pre>Success: A proper connection to MySQL was made! The my_db database is great.
Host information: localhost:8889 via TCP/IP
THE DATABASE IMAGE FROM PHPMyAdmin has been linked here
1) You open the connection using mysqli_connect but later use mysql_fetch_array. Change it to mysqli_fetch_array: those are different drivers.
2) Are you sure that you have got json addon installed? You can check it using phpinfo(); or just try to var dump: var_dump(json_encode(['something']));
I have MySQL database, it contain a table with a column called "downloads"
I want to update this column to 0 every 24h, but it seems my code doesn't work!
I have folder on the server named cron.
Inside it there is two files, one to connect to the database, and the other contain the php code to reset the column downloads to 0
This is my connection code:
<?php
$link = mysqli_connect("localhost", "test", "root", "test1");
if (!$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;
?>
And my php code that I want to use it in cronjob is this one:
<?php
require_once('/home/cron/connect.php'); // connect to db
$mysqli = ("update users set downloads = 0");
$mysqli->close();
?>
I fired the file directly from the browser but it doesn't reset the column downloads to zero! what I'm doing wrong?
Note: of course there is .htaccess file to protect direct access to the connection file
EDIT: There is no error at connection if I run the code of connection, but the second code from cronjob doesn't work!
You do not need $mysqli->close(); at all. Your connection object is called $link. The second line should be:
$link->query("update users set downloads = 0");
You should probably also check if it executed properly and if not do something about it.
Your full code in second file could look like this (assuming the connection is successful):
<?php
require_once('/home/cron/connect.php'); // connect to db
if( $link->query("update users set downloads = 0") ){
// succesful
} else {
// fail
}
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);
?>
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?
I have two blocks of code in the body section of an html ( .php) document. The code block before my heading executes, but the block after the heading does not. I've tried phpinfo(); in the first block and it runs fine. Try it in the second block and it doesn't. I have no idea why this could be. If anyone has suggestions I'm all ears.
I'm currently running xampp on a windows machine.
<body>
<?php
if (isset($_SESSION['ProfileID'])){
echo "<div style='text-align: right'>"
. "<a href='CZSN_Login.php'>Log "
. "Out</a></div>\n";
}
//here phpinfo() executes
?>
<h1>Chinese Zodiac Social Network</h1>
<?php
require_once("Includes/inc_ChineseZodiacDB.php");
//here phpinfo() will not execute
if (isset($_SESSION['ProfileID'])){
echo "<h2>Member Pages</h2>\n";
echo"<p>Below is a list of the members of the Chinese Zodiac Social"
. "Network. Click on a member's name to view that member's detailed information"
. "You may also choose to <a href='CZSN_MyProfile.php'>update your profile</a>.</p>\n";
$SQLQuery="select first_name, last_name, user_name "
. "from zodiac_profiles order by "
. "last_name, first name, user_name;";
$result=$DBConnect->query($SQLQuery);
if ($result===false){
echo $ErrorMsgs[];
}
else{
//This should never happen, but we can check anyway.
if ($result->num_rows==0){
echo "<p>There are no members to show.</p>\n";
}
Here is the code in my inc_ChineseZodiacDB.php file:
<?php
$ErrorMsgs = array();
$DBConnect = #new msqli("localhost", "root", "password", "chinese_zodiac");
if ($DBConnect->connect_error)
$ErrorMsgs[] = "The database server is not available."
. "Connect Error is "
. $mysqli->connect_errno
. " " . $mysqli->connect_error . ".";
?>
Try searching in require_once ("Includes / inc_ChineseZodiacDB.php"); there can be triggered die() or exit();
I guess you get "Error headers already sent", because of the title <h1>Chinese Zodiac Social Network</h1>. For phpinfo() to work there shouldn't be any output yet.
You are closing the php tag in the inc_ChineseZodiacDB file (i.e. you have ?> at the end of that file).
When your first file reads in the inc_ChineseZodiacDB file and sees the ?>, it interprets that as the end of your php section of code, and all the other code after require_once("Includes/inc_ChineseZodiacDB.php"); is ignored and read as regular html.
Remove that line, and your problem should be fixed:
<?php
$ErrorMsgs = array();
$DBConnect = #new msqli("localhost", "root", "password", "chinese_zodiac");
if ($DBConnect->connect_error)
$ErrorMsgs[] = "The database server is not available."
. "Connect Error is "
. $mysqli->connect_errno
. " " . $mysqli->connect_error . ".";
I figured out the ultimate problem. in the include file it reads:
<?php
$ErrorMsgs = array();
$DBConnect = #new msqli("localhost", "root", "password", "chinese_zodiac");
if ($DBConnect->connect_error)
$ErrorMsgs[] = "The database server is not available."
. "Connect Error is "
. $mysqli->connect_errno
. " " . $mysqli->connect_error . ".";
?>
where it should read:
<?php
$ErrorMsgs = array();
$DBConnect = #new mysqli("localhost", "root", "password", "chinese_zodiac");
if ($DBConnect->connect_error)
$ErrorMsgs[] = "The database server is not available."
. "Connect Error is "
. $mysqli->connect_errno
. " " . $mysqli->connect_error . ".";
?>
Note, I was calling msqli rather than mysqli. One simple typo...I'm still not understanding why the error messages were not being thrown for calling an undefined function. I added error_reporting(E_ALL); and ini_set('display_errors', 1); to the top of the file as well, and still no errors thrown. Either way, it works now. Thank you to everyone for the assistance.