I am attempting to delete rows from a databases. The DELETE query is checking for a match in date from an array and that reason is empty. My code is;
<?php
session_start();
include 'connection.php';
include 'DateTest.php';
$deleted = array();
$size = sizeof($dayOfTheWeek) - 1;
for ($count = 0; $count <= $size; $count++) {
$query = "DELETE FROM daysoff WHERE DATE(start) = '$dateMonthYearArr[$count]' AND reason = ''";
mysql_query($query) or die("im dead1");
$deleted[] = "Rota deleted for ". $dateMonthYearArr[$count] .".</br>";
} $_SESSION['delete'] = $deleted;
header('Location: '. $_SERVER['HTTP_REFERER']) ;
?>
This DELETE query is dying, if I remove one of the WHERE arguments, either one, it works, but the AND seems to be an issue. Where is this failing?
Try
$query = "DELETE FROM daysoff WHERE DATE(start) = '" . $dateMonthYearArr[$count] . "' AND reason = ''";
And see how it goes...
Related
So I thought this would be a simple query to just delete rows that didn't have any data stored under certain columns, but for some reason my query is returning that zero rows have been deleted, I checked the table and they are still there.
What I want to do is delete from my gps_routes table where the route_lat and route_long do not contain a location (empty).
I have checked my to make sure I have delete permissions enabled as well.
$sql = "SELECT * FROM gps_routes";
$result = $link->query($sql);
$rowCount = $result->num_rows; $rows_deleted = 0; $delete_row = false;
if ($rowCount > 0)
{
while($row = $result->fetch_assoc())
{
$user = $row['user_email'];
$id = $row['route_id'];
$lat = $row['route_lat'];
$lng = $row['route_long'];
if (empty($lat) || empty($lng)){
$delete_row = true;
}
if (ctype_space($lat) || strlen(trim($lat)) == 0){
$delete_row = true;
}
if ($lat == '' || $lat == ""){
$delete_row = true;
}
if ($delete_row){
$rows_deleted++;
mysqli_query($link, "DELETE FROM gps_routes WHERE user_email = '$user' AND route_id = '$id'");
}
}
echo "Routes deleted: $rows_deleted";
}
From your code is suggest that you just want to go through your DB and check to see if the lat and long are empty. If they are then delete them.
Sounds like you can just use this query to get the job done.
mysqli_query($link, "DELETE FROM gps_routes WHERE (route_lat = '' OR route_lat IS NULL) OR (route_long = '' OR route_long IS NULL)");
This is how I would do it based off the code you have provided:
$query = "DELETE FROM gps_routes WHERE (route_lat = '' OR route_lat IS NULL) OR (route_long = '' OR route_long IS NULL)";
$result = $link->query($query);
echo 'Routes deleted: ' . $result->num_rows;
So I'm trying to delete a comment on the website and also from database, but it just works find on web site. After I click delete button, the comment is gone, but nothing changed in my database. After I refresh the page, the comments I deleted appear again.
So I think, somehow, ajax makes php disconnect to MySQL database anymore.
jquery:
$(".delete").each(function (index4) {
$(this).on("click",function (event) {
$(this).parent().parent().load("../public/form/delete_comments.php", {index4:index4}, function () {
$(this).remove();
});
})
php:
<?php
require_once "../../private/initialize.php";
$id = $_SESSION['id'];
$thread_clicked = isset($_POST['index4'])?$_POST['index4']:'';
$req_user = "SELECT * FROM log_in WHERE id='" .$id. "'";
$result_user = mysqli_query($db,$req_user);
$subject_user = mysqli_fetch_assoc($result_user);
$req = "DELETE FROM comments WHERE user=`" .$subject_user['account']. "` AND c_id=`" .$thread_clicked. "`";
$result = mysqli_query($db,$req);
UPDATE: i changed ajax to :$(this).parent().parent().load("/yyqGS/public/form/delete_comments.php",{index4:index4});
but still doesn't do any change to database.
UPDATE:
<?php
require_once "../../private/initialize.php";
session_start();
$id = $_SESSION['id'];
$thread_clicked = isset($_POST['index4'])?$_POST['index4']:'';
$thread_clicked = $thread_clicked +1;
$req_user = "SELECT * FROM log_in WHERE id='.$id.'";
$result_user = mysqli_query($db,$req_user);
$subject_user = mysqli_fetch_assoc($result_user);
$req = "DELETE FROM comments WHERE user='" .$subject_user['account']. "' AND c_id='" .$thread_clicked. "'";
$result = mysqli_query($db,$req);
if ( !$req ) {
printf("Error: %s\n", $mysqli_error($db));
}
else{
echo $result;
}
and i got 1 everytime i delete a comment, but database still doesn't change!
Magic just happened! I don't even know what have I done (I fixed quotation marks problem), but it just works know!
<?php
require_once "../../private/initialize.php";
session_start();
$id = $_SESSION['id'];
$thread_clicked = isset($_POST['index4'])?$_POST['index4']:'';
$thread_clicked = $thread_clicked +1;
$req_user = "SELECT * FROM log_in WHERE id='".$id."'";
$result_user = mysqli_query($db,$req_user);
$subject_user = mysqli_fetch_assoc($result_user);
$req = "DELETE FROM comments WHERE user='" .$subject_user['account']. "' AND c_id='" .$thread_clicked. "'";
$result = mysqli_query($db,$req);
if ( !$req ) {
printf("Error: %s\n", $mysqli_error($db));
}
else{
echo $req;
}
?>
<?php
require_once "../../private/initialize.php";
$id = $_SESSION['id'];
$thread_clicked = isset($_POST['index4'])?$_POST['index4']:'';
$req_user = "SELECT * FROM log_in WHERE id='$id'";
$result_user = mysqli_query($db,$req_user);
$subject_user = mysqli_fetch_assoc($result_user);
$req = $result = mysqli_query($db,$req);
$req = "DELETE FROM comments WHERE user='"$subject_user['account']"' AND c_id='"$thread_clicked"'";
$result = mysqli_query($db,$req);
Try this code for your php. If it works fine i will edit with explanation.
Your using the wrong quotes in your delete statement - your using back ticks which is used to identify fields, not surround values.
$req = "DELETE FROM comments WHERE user=`" .$subject_user['account']. "` AND c_id=`" .$thread_clicked. "`";
should be
$req = "DELETE FROM comments WHERE user='" .$subject_user['account']. "' AND c_id='" .$thread_clicked. "'";
with single quotes rather than backticks.
Edit: It's also useful to check the return values from queries...
if ( !$result ) {
printf("Error: %s\n", $mysqli_error($db));
}
Should let you know if there are any problems with the delete.
I'm new to PHP and SQL. I'm trying to make a rule so that it will only show certain information for certain pages. The code I'm using is
include 'dbh-login.php';
$id = $_GET['id'];
$i = 1;
while ($i != 100) {
$sql = "SELECT * FROM ui_off WHERE id='$i'";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
if ($row['link'] = $id) {
echo $row['title']."<br>";
}
$i++;
}
The if statement seems to have no effect on weather the script echoes the title or not.
You are missing == assignment. Here is the working code.
$id = $_GET['id'];
$i = 1;
while ($i != 100) {
$sql = "SELECT * FROM ui_off WHERE id='$i'";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
if ($row['link'] == $id) {
echo $row['title']."<br>";
}
$i++;
}
Your code does not make any sense.
You are using a while loop and looping in it 100 times just to check if 1 row have the given id.
Why don't you search directly for the id? Your code will be cleaner and you will free some memory on the server by deducting 100 queries each time the page is opened.
$id = $_GET['id'];
$sql = "SELECT * FROM ui_off WHERE id!='100' AND link='$id'" ;
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
if ($row['link'] != '') {
echo $row['title']."<br>";
}
I had this query using php in inserting images after submitting the form It says "Requirements submitted succesfully" but there is no data inserted in database.
This is my code so far:
if(isset($_POST['sumit'])){
$count = count($_FILES);
$query = "SELECT * FROM dummyclients_tbl WHERE user_id = '".$_SESSION['user']."'";
if (!$result = mysql_query($query)) {
exit(mysql_error());
}
if(mysql_num_rows($result)){
$row = mysql_fetch_assoc($result);
$sid = $row['user_id'];
$coll =$row['college'];
$stat = "Pending";
$query = "INSERT INTO request_tbl (user_id,document_id,imgreq1,imgreq2,imgreq3,imgreq4,imgreq5,imgreq6,imgreq7,request_status,college) VALUES ('$sid','$passed_id'";
for($i = 1; $i <= $count; ++$i){
if(is_uploaded_file($_FILES['imgreq'.$i]['tmp_name']) && $_FILES['imgreq'.$i]['size']){
$query .= ",'" . base64_encode(file_get_contents(addslashes($_FILES['imgreq'.$i]['tmp_name']))) . "'";
}else{
$query .= ",NULL";
}
}
$query .= ",'$stat','$coll')";
?>
<script>alert('Requirements Successfully Submitted!');</script>
<?php
// saveimage($query);
}
else{
?>
<script>alert('Error while submitting form!');</script>
<?php
}
}
I dont know where did I go wrong so please if anyone can help I appreciate it. Thanks.
So it is true that I did not execute the query and forgot to put mysql_query($query); after $query .= ",'$stat','$coll')"; . And that lead me to solving another problem wherein I did not set the fields in the database to receive NULL values which is the cause of the error.
after:
$query .= ",'$stat','$coll')";
add
mysql_query($query)
I'm new to PHP, now I face some strange issue about updating the value.
From these codes
for($i=0; $i < $count; $i++){
$sql = ("UPDATE applicant_skill SET App_skill_performance_score = '".$s_score[$i]."', App_skill_knowledge_score = ".$k_score[$i]."' WHERE App_Data_ID ='".$a_id."' && Position_ID = '".$p_id."' && Skill_ID = '".$skill_id[$i]."' ");
$resultt = "";
if ($conn->query($sql) == TRUE) {
$resultt = "FINISH";
} else {
$resultt = "ERROR";
}
}
At first I use INSERT and it works fine. Now I change to UPDATE but it updates nothing (the field is already in database waiting for update).
I don't know where mistake is, please help.
Try
$sscrore = $s_score[$i];
$kscore = $k_score[$i];
$aid = $a_id;
$pid = $p_id;
$skillid = $skill_id[$i];
$sql = ("UPDATE applicant_skill SET App_skill_performance_score = '$sscrore', App_skill_knowledge_score = '$kscore' WHERE App_Data_ID ='$aid' AND Position_ID = '$pid' AND Skill_ID = '$skillid' ");
Basically, you are missing one ' before ".$k_score[$i]."'
use AND instead of &&