I want to delete mySQL rows with checkboxes. This is a code that should work according to someone on the internet, but some reason it doesn't for me. When I click delete it only refreshes but the row doesn't disappear. Has this something to do with my ID in the table?
<body>
<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password="*****"; // Mysql password
$db_name="test"; // Database name
$tbl_name="deviation"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">Åtgärda</td>
<td align="center" bgcolor="#FFFFFF"><strong>Chassinummer</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Problem detail</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Fault code</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Position</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Help object</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Operation step</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<?php echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><?php echo $rows['chassi']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['problem_detail']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['fault_code']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['fault_code']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['position']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['help_object']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['operation_step']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
**$checkbox = $_POST['checkbox'];**
**$delete = $_POST['delete'];**
// Check if delete button active, start this
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
**$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";**
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=deletetable.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>
</body>
There are certain things I want to direct your attention towards:
1) There are a number of lines in PHP enclosed in nonsensical double-asterisks. I'm shocked the PHP actually ran through those.
2) You have a $result defined within the global scope at the top of your script (where it was given a resource pointer from mysql_query()). This means that at the bottom, where you check for if($result), that check will always come to true (unless there were syntactic errors). This also means that the page will always refresh when you click submit regardless of whether the deletion actually happened.
As I've mentioned in the comments, that code is (frankly speaking) a piece of crap. It's vulnerable to SQL injection, the code doesn't actually do what it's supposed to do, it's using deprecated attributes and functions... The failure of the code to do what you want isn't because of the IDs in your table, it's because of the broken, non-functioning code you copied off the Internet.
Don't iterate over whole table
Replace this
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
**$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";**
$result = mysql_query($sql);
}
with
if(isset($_POST['checkbox']) && is_array($_POST['checkbox')){
foreach($_POST['checkbox'] as $id){
$id = (int)$id;
$sql = "DELETE FROM $tbl_name WHERE id='$id'";
$result = mysql_query($sql);
}
}
Related
Please look why this code dosen't work, I didn't remove the lines.
Connection to server is ok. I can add new rows, but when I press DELETE on selected rows - noting happends. I think that something is wrong in 'for'..
Thank you in advance!
<?php
$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name=""; // Database name
$tbl_name="test_mysql"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" align="center" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Imię</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Nazwisko</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Wiek</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Płeć</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['name_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['lastname_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['old_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['sex_client']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
// Check if delete button active, start this
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=login_success.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>
To make things work, just replace the code below with the ones in lines 59-69.
if(isset($_POST) && isset($_POST['checkbox']))
{
$toDelete = $_POST['checkbox'];
for($i=0; $i<count($toDelete); $i++)
{
$del_id = $toDelete[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result)
echo "<meta http-equiv=\"refresh\" content=\"0;URL=login_success.php\">";
}
Besides, you're better to reconsider your code:
I believe the '' in the "delete" query are redundant,
mysql_connect() is deprecated,
short opening tags (<?) are discouraged,
You can delete all the selected items in one SQL query, instead of doing it repeatedly:
$idsToDelete = implode(',', $_POST['checkbox']);
$sql = "DELETE FROM $tbl_name WHERE id IN ($idsToDelete);";
I'm Trying To Delete Multiple Rows By Using Check Boxes. But The Values Are Not Deleting.
I Don't Understand Where I'm Going Wrong.
Please Help Me.
Connect.php
<?php
$host="localhost"; // Host name
$username="DB_USERNAME"; // Mysql username
$password="DB_PASSWORD"; // Mysql password
$db_name="DB_NAME"; // Database name
$tbl_name="TABLE_NAME"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
?>
exe.php
<?php
include "connect.php";
// Check if delete button active, start this
if($_POST['delete'])
{
$id = $_POST['data'];
$count = count($id);
for($i=0;$i<$count;$i++){
//echo "<br> value = ".$id[$i]."Jumlah = ".$count ;
$sql = "DELETE FROM $tbl_name WHERE id='$id[$i]'";
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result){echo "<meta http-equiv=\"refresh\" content=\"0;URL=index.php\">";}
}
mysql_close();
?>
index.php
<?php
include "connect.php";
$result=mysql_query("SELECT * FROM $tbl_name ORDER BY ts DESC");
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="exe.php">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Order Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Username</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Link</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Type</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="data[]" type="checkbox" id="data" value="<?php echo $rows['oid']; ?>">
</td>
<td bgcolor="#FFFFFF"><?php echo $rows['oid']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['user']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['data']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['type']; ?></td>
</tr>
<?php
}unset($rows);
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete">
</td>
</tr>
</table>
</form>
</td>
</tr>
</table>
Someone please help me with this and tell me where am i wrong. I'm still learning PHP.
Instead of using a loop an running several SQL queries, you can just use the built in SQL WHERE IN clause:
$ids = join(',',$id); //same as using implode()
$sql = "DELETE FROM $tbl_name WHERE id IN '$ids'";
It will be more efficient!
Hope this helps!
I have a page that displays all of the contents of my table. Alongisde each row of the table I also have a column containing a checkbox. I have implemented this for deleting rows. If in case i want to edit and save changes in the table how am i supposed to deal with?Below is the code which i have implemented for delete.
<?php
// Connect to server and select databse.
mysql_connect("localhost", "root", "")or die("cannot connect");
mysql_select_db("project")or die("cannot select DB");
$sql="SELECT * FROM menu";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Vendor_id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Item_id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Item_name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Price</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<?php echo $rows['item_id']; ?>"></td>
<td bgcolor="#FFFFFF"><?php echo $rows['vendor_id']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['item_id']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['item_name']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['Price']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
// Check if delete button active, start this
if(isset($_POST['delete'])){
$checkbox = $_POST['checkbox'];
for($i=0;$i<count($_POST['checkbox']);$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM menu WHERE item_id='$del_id'";
$result = mysql_query($sql);}
if($result){echo "<meta http-equiv=\"refresh\" content=\"0;URL=delete_menu.php\">";}}
mysql_close();
?>
</table></form></td></tr></table>
first of all use PDO instead of mysql...
and for your answer ..
there are many ways to do this... but the simplest that i can think of is.. creating an edit button/(link) in each table rows. this sends the id of the data to be edited to a php page where u can do the editand saving it to the database table part...
for an example...
i will add this to your table..
HTML
<td bgcolor="#FFFFFF"><a href="saveEdit.php?id=".<?php echo $rows['vendor_id']; ?>EDIT</a></td>
this will take u to the saveEdit.php page with an id...
u can get the id value in saveEdit.php by
$vendor_id=$_GET['id'];
u have an id now...create a form...get related data of that vendor from the table and show it in the form...let user edit it...and save it to the database table..like u did, to delete the vendor..
I am trying very hard for the last 2 hours but am not able to understand. Why am I getting undefined variable in DELETE. Please please look in to my code and help me out.
My main intention is to delete multiple rows at once using checkboxes.
When I am trying to run the below codes it gives me following errors:
Undefined variable: delete in C:\xampp\htdocs\xampp\Test\HRMS\try\search1.php on line 61
But I already have used it in following way:
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
Thanks in advance.
my php codes :
<?php
$host="localhost"; // Host name
$username="a"; // Mysql username
$password="a"; // Mysql password
$db_name="b"; // Database name
$tbl_name="emp_info"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Password</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Address</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Source</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>salary</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Zip</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Mobile</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Email</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['eid']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['eid']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['ename']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['password']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['address']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['source']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['salary']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['zip']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['mobile']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['email']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
// Check if delete button active, start this
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE eid='$del_id'";
$result = mysql_query($sql);
}
// if successful redirect to search1.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=search1.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>
Register globals is off (and this is good) so the line
if($delete){
should be
if (isset($_POST['delete'])) { ...
Moreover you need to restructure your code as it's absolutely unnecessery to make a select query to database when you have a post request to delete records.
Here is a complete code you need. Just replace yours with this one.
<?php
error_reporting(E_ALL);
$host = "localhost"; // Host name
$username = "a"; // Mysql username
$password = "a"; // Mysql password
$db_name = "b"; // Database name
$tbl_name = "emp_info"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Delete records
if (isset($_POST['delete']))
{
// Concatenate ids in a comma-separated string
$ids = implode(',', $_POST['checkbox']);
if (!empty($ids))
{
$sql = "DELETE FROM $tbl_name WHERE eid IN ($ids)";
$result = mysql_query($sql) or die(mysql_error());
}
// Redirect back
header('Location: search1.php');
die();
}
// Select records
$sql = "SELECT * FROM $tbl_name";
$result = mysql_query($sql);
$count = mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td>
<form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong></td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Name</strong></td>
</tr>
<?php while ($rows = mysql_fetch_array($result)) { ?>
<tr>
<td align="center" bgcolor="#FFFFFF">
<input name="checkbox[]" type="checkbox" id="checkbox[]"
value="<?php echo $rows['eid']; ?>">
</td>
<td bgcolor="#FFFFFF"><?php echo $rows['eid']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['ename']; ?></td>
</tr>
<?php } ?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF">
<input name="delete" type="submit" id="delete" value="Delete">
</td>
</tr>
</table>
</form>
</td>
</tr>
</table>
Before looping results from MySQL result variable, you should ALWAYS have to make sure that it contain any values:
if($total > 0)
{
while ($rows = mysql_fetch_array($result))
{
//your code goes here
}
}
Another issue you have here, is same as in your previous question, variable $delete is not defined, based on your code, it is not clear where it is coming from.
So, if $delete is actually a $_POST variable, your if statement should look like this:
if(isset($_POST['delete'])){}
Another issue, $checkbox it is not defined to. I would recommend you to read more about filter_input method as it can be very handy on sanitizing user submitted data.
Also you are using incorrect html tags instead of:
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
use correct TD tag which aligns text in center and makes it bold, also bgcolor should be defined in CSS file.
<th bgcolor="#FFFFFF">Id</th>
Your final code should look like this:
<?php
$host = "localhost"; // Host name
$username = "a"; // Mysql username
$password = "a"; // Mysql password
$db_name = "b"; // Database name
$tbl_name = "emp_info"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Make sure that delete action was called using
//$delete = isset($_POST['delete']);
//OR
//$delete = array_key_exists('delete', $_POST);
//OR
$delete = filter_input(INPUT_POST, 'delete');
$selected = filter_input(INPUT_POST, 'checkbox', FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY);
if ($delete && !empty($selected))
{
foreach ($selected as $id)
{
$sql = "DELETE FROM $tbl_name WHERE eid='$id'";
$result = mysql_query($sql);
}
// if successful redirect to search1.php
echo "<meta http-equiv=\"refresh\" content=\"0;URL=search1.php\">";
}
$sql = "SELECT * FROM $tbl_name";
$result = mysql_query($sql);
$count = mysql_num_rows($result);
?>
<form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<th bgcolor="#FFFFFF"> </th>
<th colspan="9" bgcolor="#FFFFFF">Delete multiple rows in mysql</th>
</tr>
<tr>
<th bgcolor="#FFFFFF">#</th>
<th bgcolor="#FFFFFF">Id</th>
<th bgcolor="#FFFFFF">Name</th>
<th bgcolor="#FFFFFF">Password</th>
<th bgcolor="#FFFFFF">Address</th>
<th bgcolor="#FFFFFF">Source</th>
<th bgcolor="#FFFFFF">salary</th>
<th bgcolor="#FFFFFF">Zip</th>
<th bgcolor="#FFFFFF">Mobile</th>
<th bgcolor="#FFFFFF">Email</th>
</tr>
<?php
if ($count)
{
while ($rows = mysql_fetch_array($result))
{
?>
<tr>
<td align="center" bgcolor="#FFFFFF">
<input name="checkbox[]" type="checkbox" id="checkbox" value="<?php echo $rows['eid']; ?>">
</td>
<td bgcolor="#FFFFFF"><?php echo $rows['eid']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['ename']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['password']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['address']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['source']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['salary']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['zip']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['mobile']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['email']; ?></td>
</tr>
<?php
}
}
mysql_close();
?>
<tr>
<td colspan="10" align="center" bgcolor="#FFFFFF">
<input name="delete" type="submit" id="delete" value="Delete">
</td>
</tr>
</table>
</form>
Please don't just copy paste it, read it and try to understand it.
How do I get data from a database using php and show it?
The database table has columns, labeled as ID & Number. ID is unique & fixed whereas Number is just a non-unique number. If someone visits
http://example.com/show.php?ID=32, and show.php should fetch the Number & display "Your number is XXX”
Please provide the code-samples.
<?php
//Connect to DB
$db = mysql_connect("localhst","user","pass") or die("Database Error");
mysql_select_db("db_name",$db);
//Get ID from request
$id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
//Check id is valid
if($id > 0)
{
//Query the DB
$resource = mysql_query("SELECT * FROM table WHERE id = " . $id);
if($resource === false)
{
die("Database Error");
}
if(mysql_num_rows($resource) == 0)
{
die("No User Exists");
}
$user = mysql_fetch_assoc($resource);
echo "Hello User, your number is" . $user['number'];
}
This is very basic but should see you through.
First get the id of the user(it may given while visiting or based on the details given while visiting)
Then write select query to the table which contains 'number' field.like
SELECT number FROM table1 WHERE table1.ID=IDFromtheuser;
try
SELECT number from numberTable nt
JOIN idTable it ON it.ID = nt.ID
WHERE it.ID = `your given id`
as i think your both tables are referenced with id
<?php
$host="localhost";
$username="";
$password="";
$db_name="multiple_del";
$tbl_name="test_mysql";
// Connect to server and select databse.
mysql_connect("$host", "root", "")or die("cannot connect");
mysql_select_db("multiple_del")or die("cannot select DB");
$sql="SELECT * FROM test_mysql";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Lastname</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Email</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['name']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['lastname']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['email']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM test_mysql WHERE id='$del_id'";
$result = mysql_query($sql);
}
}
?>
</table>
</form>
</td>
</tr>
</table>
its my code but its not working and error are show in this code:-
<?php
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM test_mysql WHERE id='$del_id'";
$result = mysql_query($sql);
}
}
?>
please help me.