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hey i just want a query which will be printing only the result of count query . put in the else part
<?php
$con = mysql_connect('localhost', 'root', '') or die(mysql_error());
$db = mysql_select_db('quiz', $con) or die(mysql_error());
$q="count(*) from question where ans=uanswer";
$rq=mysql_query($q,$con);
if(!$rq)
{
echo " the sql query faiiled to work ";
}
else
{
}
?>
You would use the function mysql_fetch_row() to return a row from your database query as an array. You can then access the result for the count(*) as the first element in the returned array.
<?php
$con = mysql_connect('localhost', 'root', '') or die(mysql_error());
$db = mysql_select_db('quiz', $con) or die(mysql_error());
$q="count(*) from question where ans=uanswer";
$rq=mysql_query($q,$con);
if(!$rq)
{
echo " the sql query faiiled to work ";
}
else
{
$row = mysql_fetch_row($rq);
echo $row[0];
}
?>
Related
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Here is my function .Earlier it was working in a very better way but now a day it is not working well .
function table_rows()
{
$sql="SELECT `COLUMN_NAME` FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE `TABLE_SCHEMA`='check_db' AND `TABLE_NAME`='tbl_details'";
$result= mysql_query($sql);
return $result;
}
The function results..Something like this .I want only field names.
COLUMN_NAME
tbl_structure.php?change_column=1&field=id&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=fnme&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=lnme&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=age&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=dob&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=mail&token=8a5756ad27bfde74d341bfed684767e5
tbl_structure.php?change_column=1&field=ads&token=8a5756ad27bfde74d341bfed684767e5
first, mysql_ is deprecated. Use mysqli_ or PDO
second, you are only executing the sql query, but not fetching any data. Try the code below. Note that $con is the variable to connect to db. You should change it to your own
(Edited)
https://www.w3schools.com/php/func_mysqli_query.asp
https://www.w3schools.com/php/func_mysqli_fetch_array.asp
function db () {
static $con;
if ($con===NULL){
$con = mysqli_connect ("localhost", "root", "", "database");
}
return $con;
}
function table_rows()
{
$con = db();
$sql="SELECT `COLUMN_NAME` FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE `TABLE_SCHEMA`='check_db' AND `TABLE_NAME`='tbl_details'";
$query= mysqli_query($con,$sql);
$result= mysqli_fetch_array($query,MYSQLI_ASSOC);
return $result;
}
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I want to execute these lines When I click on the button:
$cijfer = mt_rand(1, 25);
$query = "select word from dba_tblwords where wordId = '$cijfer'";
It will pick another word from the database using that query.
The button in the HTML page:
echo "<A HREF=$self?n=$n>Play again.</A>\n\n";
How can I do this?
To actually run the query you can use MySQLi. Here is a good beginners guide.
//Connect to database.
$db = new mysqli('localhost', 'user', 'pass', 'database');
//The code you provided.
$cijfer = mt_rand(1, 25);
$query = "select word from dba_tblwords where wordId = '$cijfer'";
//Run the query.
$result = $db->query($sql);
//Get the first (and presumably only) row
$row = $result->fetch_assoc();
//Output the word.
echo $row['word'];
//Free up some memory.
$result->free();
To get the link to work, you need to have the name of the page. You can either hardcode it, or use $_SERVER['PHP_SELF']:
echo 'Play again!'
(I don't know what you use the $n for so I just left it in there.)
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a.php
include 'function.php';
$avg = get_ecomm_avg_rating();
echo "Avg rating :- $avg";
function.php
$conn = mysqli_connect("myserver","abc","red", "live");
if (mysqli_connect_errno())
{
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
function get_ecomm_avg_rating()
{
$query = "SELECT AVG(ROUND((r.ratings_sum / r.ratings_qty),1)) AS total_rating
FROM abc AS c, xyz AS r
WHERE c.store
IN (994,094)
AND r.reviewid = c.id
AND c.published = '1'";
$avg_rating_result = mysqli_query($conn,$query);
$avg_rating_row = mysqli_fetch_array($avg_rating_result);
$avg_rating_count = $avg_rating_row[0];
$avg_rating_count_final = number_format($avg_rating_count, 1);
return $avg_rating_count_final;
}
Always return 0.0. What should I do? Any batter approach? I'm New to functions and PHP
There is a problem with a variable scope, var $conn doesn't exists in the function.
You need to add this var by parameter:
function get_ecomm_avg_rating($conn, $storeno) {
....
}
// and here when calling the function you pass there a DB connection
$avg = get_ecomm_avg_rating($conn);
// $conn has to be defined elsewhere, like $conn = mysqli_connect(...)
Then, you have there parameter $storeno which is unused.
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I am trying to select a table and I don't know what I am doing wrong:
$result = mysql_query('SELECT * FROM sfat WHERE done="0" LIMIT 0,10');
$row = mysql_fetch_array($result)
$url = $row["web"];
use
while ($row = mysql_fetch_array($result) ) {
$url = $row["web"];
echo $url;
}
in stead of
$row = mysql_fetch_array($result)
$url = $row["web"];
Because your query indicates you are expecting up to 10 rows. But your code will only show the first one.
The following example will be used to create database
<?php
$con=mysqli_connect("hostname","username","password");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Create database
$sql="CREATE DATABASE my_db";
if (mysqli_query($con,$sql))
{
echo "Database my_db created successfully";
}
else
{
echo "Error creating database: " . mysqli_error($con);
}
?>
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I am not experienced in PHP so I need your help on this. I would like to create on array from two, if I can say like that.
Basically, I would like to make from this:
[{"Naziv":"Nemanja","duzina":"45.475","sirina":"23.423"},{"Naziv":"Aleksandar","duzina":"45.427","sirina":"21.124"}]
to something like this:
[{"Naziv":"Nemanja","duzina":["45.475","23.423"]},{"Naziv":"Aleksandar","duzina":["45.427","21.124"]}]
Here is my PHP:
// Create connection
$con = mysqli_connect($host, $user, $pwd, $db);
// Check connection
if(mysqli_connect_errno($con)) {
die("Failed to connect to MySQL: " . mysqli_connect_error());
}
// query the application data
$sql = "SELECT Naziv,duzina,sirina FROM lokacije";
$result = mysqli_query($con, $sql);
// an array to save the application data
$rows = array();
// iterate to query result and add every rows into array
while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
$rows[] = $row;
}
// close the database connection
mysqli_close($con);
// echo the application data in json format
echo json_encode($rows);
Instead of
$rows[] = $row;
create a new array in your desired format:
$rows[] = array(
'Naziv' => $row['Naziv'],
'duzina' => array($row['duzina'], $row['sirina'])
);