hi i have several columns in my table if any of the column is empty it should be count as 1...at the same time if 2 or more columns empty in same row...it should not count as 2...
help me the mysql query.....
<?php
include("connect.php");
$unit=$_GET['unit'];
$chapter=$_GET['chapter'];
//$dept=$_GET['dept'];
$result=mysql_query("select * from `$unit` where stopic='$chapter'");
if(mysql_num_rows($result)>0)
{
while($row=mysql_fetch_array($result))
{
$a=$row['ch1'];
$b=$row['ch2'];
$c=$row['ch3'];
$d=$row['ch4'];
$e=$row['ans'];
$f=$row['ques'];
}
}
else
{
echo "";
}
?>
if $a or $b or $c or $d or $e or $f is empty...it should count as 1...per row only once..not to count as 2 for the same row
Try this simple code
<?php
include("connect.php");
$unit=$_GET['unit'];
$chapter=$_GET['chapter'];
//$dept=$_GET['dept'];
$result=mysql_query("select * from `$unit` where stopic='$chapter'");
$empty_record = 0;
if(mysql_num_rows($result)>0)
{
while($row=mysql_fetch_array($result))
{
$a=$row['ch1'];
$b=$row['ch2'];
$c=$row['ch3'];
$d=$row['ch4'];
$e=$row['ans'];
$f=$row['ques'];
if($a=='' || $b=='' || $c=='' || $d=='' || $e=='' || $f=='')
{
$empty_record++;
}
}
}
else
{
echo "";
}
echo $empty_record;
?>
I would try something like this:
<?php
include("connect.php");
$unit=$_GET['unit'];
$chapter=$_GET['chapter'];
//$dept=$_GET['dept'];
$result=mysql_query("select * from `$unit` where stopic='$chapter'");
if(mysql_num_rows($result)>0)
{
$numOfEmpty = 0;
while($row=mysql_fetch_row($result))
{
for($i = 0;$i<count($result);$i++) {
if ($result[$i] == "") {
$numOfEmpty++;
break;
}
}
}
echo $numOfEmpty;
}
else
{
echo "";
}
?>
Please let me know however, if the code works. :)
I don't really understand your problem.
Maybe this will help - you can use the isempty() function, which will return true if your variable is empty.
Make a variable named empty and give it value 0. Then on your for loop add this:
if(isempty($a)||isempty($b)||isempty($c)||isempty($d)||isempty($e)||isempty($f))
$empty++;
Related
I am trying to get dynamic $_SESSION[$id] on the second page shown below, but its not working (as per the printout):
First page url
https://example.com/test.php?id=1548393
First page code
<?php
session_start();
$id = $_GET['id'];
$_SESSION[$id] = "mysecretstringline";
?>
Second page url
https://example.com/test2.php?id=1548393
Second page code
<?php
session_start();
$id = $_GET['id'];
if(isset($_SESSION[$id])){
echo "working";
}else{
echo "not working";
}
?>
i found problem we can not use numeric index for $_SESSION
but we can use number in $_SESSION by convert number to roman numerals
first page url
https://example.com/test.php?id=1548393
first page code
<?php
session_start();
$roman_id = romanic_number($_GET['id']);
$_SESSION[$roman_id] = "mysecretstringline";
function romanic_number($integer, $upcase = true)
{
$table = array('M'=>1000, 'CM'=>900, 'D'=>500, 'CD'=>400, 'C'=>100, 'XC'=>90, 'L'=>50, 'XL'=>40, 'X'=>10, 'IX'=>9, 'V'=>5, 'IV'=>4, 'I'=>1);
$return = '';
while($integer > 0)
{
foreach($table as $rom=>$arb)
{
if($integer >= $arb)
{
$integer -= $arb;
$return .= $rom;
break;
}
}
}
return $return;
}
?>
second page url
https://example.com/test2.php?id=1548393
second page code
<?php
session_start();
$roman_id = romanic_number($_GET['id']);
if(isset($_SESSION[$roman_id])){
echo "working";
}else{
echo "not working";
}
function romanic_number($integer, $upcase = true)
{
$table = array('M'=>1000, 'CM'=>900, 'D'=>500, 'CD'=>400, 'C'=>100, 'XC'=>90, 'L'=>50, 'XL'=>40, 'X'=>10, 'IX'=>9, 'V'=>5, 'IV'=>4, 'I'=>1);
$return = '';
while($integer > 0)
{
foreach($table as $rom=>$arb)
{
if($integer >= $arb)
{
$integer -= $arb;
$return .= $rom;
break;
}
}
}
return $return;
}
?>
output
working
thanks #gre_gor and #Katie
Could be that in your normal code (this just looks like a quick mockup), you have a space after ?> somewhere. That could cause issues.
<?php
// start.php
session_start();
$id = $_GET['id'];
$_SESSION[$id] = "mysecretstringline";
and
<?php
// next.php
session_start();
$id = $_GET['id'];
if (isset($_SESSION[$id])) {
echo "working";
} else {
echo "not working";
}
works for me. Notice no ?> characters.
UPDATE:
The following might be of interest regarding session name constraints (can a php $_SESSION variable have numeric id thus : $_SESSION['1234’])
You have that issue in your example you could just add an id_ and then do the same check when validating/getting the session.
I want to check if a certain field of all rows match a criteria.
So if all rows has in the Status field 'RUN' as value then echo "Success".
If there is one row with END as value then echo "Fail":
I'm guessing I need a loop and an IF statement ?
I was thinking something like this but it doesnt return anything:
while($source_row = mysqli_fetch_array($source_selection)){
if ( ($source_row['Stat']) == ("Run" ) {
echo "Success<br />";
} else
echo "Fail";
}
I don't want to echo each row, I want all rows to match a criteria then echo, if one doesn't match a criteria then echo as well.
This should work for you:
First of all you have to fetch all rows with mysqli_fetch_all(). After this I extract only the Stat column with array_column(). Then I just simply array_fill() an array with X values as you have in $states with the value "Run". And check if every value is equals.
$result = mysqli_fetch_all($source_selection, MYSQLI_ASSOC);
$states = array_column($result, "Stat");
if($states == array_fill(0, count($states), "Run")) {
echo "Success";
} else {
echo "Fail";
}
There are some error in the code and you can use the count to match -
$count = 0;
while($source_row = mysqli_fetch_array($source_selection)){
if ($source_row['Stat'] == "Run" ) {
$count++;
}
}
if($count != mysqli_num_rows($source_selection)) {
echo "Fail";
} else echo "Success";
For best performance you can do it directy on the SQL:
select count(*) from table where Stat <> 'Run';
And then test the returning value to check that is greater than zero.
To do it with php you should know that when you find an error you can stop the iterations. The code would look like that:
while($source_row = mysqli_fetch_array($source_selection)){
if ( $source_row['Stat'] != "Run" ){
$fail = true;
break;
}
}
if ($fail) {
echo "Fail";
} else
echo "Success";
}
Try this
$success=true;
while($source_row = mysqli_fetch_array($source_selection)){
if ( ($source_row['Stat']) != ("Run" ) {
$success=false;
}
}
if ($success) {
echo "Success";
} else {
echo "Fail";
}
I am trying to GET different rows from different columns in php/mysql, and pack them into an array. I am able to successfully GET a jason encoded array back IF all values in the GET string match. However, if there is no match, the code echos 'no match', and without the array. I know this is because of the way my code is formatted. What I would like help figuring out, is how to format my code so that it just displays "null" in the array for the match it couldn't find.
Here is my code:
include '../db/dbcon.php';
$res = $mysqli->query($q1) or trigger_error($mysqli->error."[$q1]");
if ($res) {
if($res->num_rows === 0)
{
echo json_encode($fbaddra);
}
else
{
while($row = $res->fetch_array(MYSQLI_BOTH)) {
if($_GET['a'] == "fbaddra") {
if ($row['facebook'] === $_GET['facebook']) {
$fbaddr = $row['addr'];
} else {
$fbaddr = null;
}
if ($row['facebookp'] === $_GET['facebookp']) {
$fbpaddr = $row['addr'];
} else {
$fbpaddr = null;
}
$fbaddra = (array('facebook' => $fbaddr, 'facebookp' => $fbpaddr));
echo json_encode($fbaddra);
}
}
}
$mysqli->close();
UPDATE: The GET Request
I would like the GET request below to return the full array, with whatever value that didn't match as 'null' inside the array.
domain.com/api/core/engine.php?a=fbaddra&facebook=username&facebookp=pagename
The GET above currently returns null.
Requests that work:
domain.com/api/core/engine.php?a=fbaddra&facebook=username or domain.com/api/core/engine.php?a=fbaddra&facebookp=pagename
These requests return the full array with the values that match, or null for the values that don't.
TL;DR
I need assistance figuring out how to format code to give back the full array with a value of 'null' for no match found in a row.
rather than assigning as 'null' assign null. Your full code as follows :
include '../db/dbcon.php';
$res = $mysqli->query($q1) or trigger_error($mysqli->error."[$q1]");
if ($res) {
if($res->num_rows === 0)
{
echo json_encode('no match');
}
else
{
while($row = $res->fetch_array(MYSQLI_BOTH)) {
if($_GET['a'] == "fbaddra") {
if ($row['facebook'] === $_GET['facebook']) {
$fbaddr = $row['dogeaddr'];
//echo json_encode($row['dogeaddr']);
} else {
$fpaddr = null;
}
if ($row['facebookp'] === $_GET['facebookp']) {
$fbpaddr = $row['dogeaddr'];
//echo json_encode($row['dogeaddr']);
} else {
$fbpaddr = null;
}
$fbaddra = (array('facebook' => $fbaddr, 'facebookp' => $fbpaddr));
echo json_encode($fbaddra);
}
}
}
$mysqli->close();
You can even leave else part altogether.
Check your code in this fragment you not use same names for variables:
if ($row['facebook'] === $_GET['facebook']) {
$fbaddr = $row['dogeaddr'];
//echo json_encode($row['dogeaddr']);
} else {
$fpaddr = 'null';
}
$fbaddr not is same as $fpaddr, this assign wrong result to if statement.
It was the mysql query that was the problem.
For those who come across this, and need something similar, you'll need to format your query like this:
** MYSQL QUERY **
if ($_GET['PUTVALUEHERE']) {
$g = $_GET['PUTVALUEHERE'];
$gq = $mysqli->real_escape_string($g);
$q1 = "SELECT * FROM `addrbook` WHERE `facebookp` = '".$gq."' OR `facebook` = '".$gq."'";
}
** PHP CODE **
if($_GET['PUTVALUEHERE']{
echo json_encode($row['addr']);
}
I have a query on my site and if there is no results, I'd like to say something else rather than have a blank page...
$sth = $conn->prepare("SELECT * FROM directory WHERE user_active != '' AND County = :county");
$sth->execute(array(':county' => $county));
$c = 1;
while ($row = $sth->fetch(PDO::FETCH_ASSOC)) {
RETURNED DATA GOES HERE
$c++;
}
$sth->execute(array(':county' => $county));
if ($sth->rowCount() == 0) {
echo 'no rows';
} else {
while(yada yada yada) { ... }
}
Relevant docs: http://php.net/manual/en/pdostatement.rowcount.php
You're counting the results in $c, so you can check which value that has by appending your code with this:
if($c == 1) { // Counter is stuck at 1
echo "No results were found.";
}
2 possible solution,
execute a SELECT COUNT
execute a fetchall check it and later display the result
Good day guys,
I've made a sweet favorites function with php mysql and ajax, and its working great. Now I want to show 'favorite' when favorite = 0 and show 'unfavorite' when favorite = 1
if ($favorites == 0) {
$favorite = 'Favorite';
}
if ($favorites == 1) {
$unfavorite = 'unFavorite';
}
and echo it in the row as :
<div id="favorites">' .($favorite). ' ' .($unfavorite). '</div>
The problem is: when favorite = 0, both $favorite and $unfavorite are being shown. When favorite = 1 only $unfavorite is being shown correctly. Of course it should be $favorite OR $unfavorite. I assume the problem is clear and simple to you, please assist :)
Thanks in advance
It's easier to use just one variable:
$text = ''
if ($favorites == 0) {
$text = 'Favorite';
} else {
$text = 'unFavorite';
}
...
echo $text;
If you want to check $favorite, you are using the wrong variable in your control statement. Also, it is better coding practice to use elseif rather than if for that second if. One more thing: it's easier to manage one resulting variable.
$output = "";
if ($favorite == 0) {
$output = 'Favorite';
}
elseif ($favorite == 1) {
$output = 'unFavorite';
}
...
echo $output; // Or whatever you want to do with your output
Is $favorites an integer?
Anyway try using three equal signs (===) or else instead of the second if:
if ( $favorites === 0 )
{
// ...
}
else // or if ($favorites === 1)
{
// ...
}
You're making a toggle, so you only need one variable:
if(empty($favourites)){
$fav_toggle = 'Favorite';
} else {
$fav_toggle = 'unFavorite';
}
echo $fav_toggle;
Same code is working on me if I assigned $favorites = 0; or $favorites = 1;
You can also use if else
$favorites = 1;
if ($favorites == 0) {
$favorite = 'Favorite';
}
else if ($favorites == 1) {
$unfavorite = 'unFavorite';
}