I have first table name is conference.
I want to insert table conference row id (81) to another second table name conf_dates
and that have field conf_id use for save conference row id
The issue is that value is empty insert in second table conf_dates as shown in second table image
Here is php code
<?php
$id = $_GET["id"];
$trans = array("strtdate"=>$strtdate,"enddate"=>$enddate,"conf_id"=>$id);
$query = $db->insert($trans,PREFIX."conf_dates");
?>
Here is html code
<p>
<label>Conference ID</label>
<input name="conf_id" class="text-input medium-input" type="text" id="conf_id" value="" />
</p>
Please tell me how to insert row id to another table field?
what are the values of $strtdate, $enddate
Also please share the table structure of "conf_dates" .
$id = intval($_GET["id"]);
check you are getting correct types, and values for variables you trying to insert
You named the input field conf_id while you try to insert $_GET['id'].
You should insert $_GET['conf_id']` instead.
Related
Let us assume there is a form which has a text field and a submit button.
Every time I type a text and submit it should be stored in the database and displayed in a table.
Additionally, when I again submit the form the old text in SQL column value should be overwritten with this new value and both values should be displayed in table rows.
So every time I do this I want old data and new data to be appended to table rows.
How to achieve this??
Instead of overwriting the data, why not create a new entry and mark it as active, such that to get the latest data using sql, you order by primary key desc limit 1. If you need the old data you ust get the previous entry.
We have very few information, but here is some idea to achieve it :
1/ Add an last field in your table and update it each time you add a new data, then when you display it just get all data and check the last field to see which one is the last :
So imagine this table :
Table data
===============================
id_data | id_user | data | last
When you display it for your user :
select * from data where id_user = :id_user order by last desc;
This way you will get the last one with last = 1 (true) first then the other.
And when you submit a new data :
// you update all old data as "old"
update data set last = 0 where id_user = :id_user;
// you create a new data
insert into data (id_user, data, last) values (:id_user, :data, 1);
2/ Add a field date so you know wich one are older than other
Table data
==================================
id_data | id_user | data | created
When you display it for your user :
select * from data where id_user = :id_user order by created desc;
This way you will get the data order by the created date with the last one first.
And when you submit a new data :
// you create a new data with the current date
insert into data (id_user, data, created) values (:id_user, :data, NOW());
This solution is better I think so you can have some "historic" of each data.
Is it what you are looking for?
why not just append it with a pipe character like so... "|entry_data" then just explode it when you need it.
var data_array = explode("|",data);
print_r(data_array);
If you want to show all changes only for some users then better to save you last value in main table and create new history table for changes.
table_history
id | id_row | field | before | after
In this case you can without additional query show last value for some users and all data for others.
In this structure you also can save multiple fields data if you need.
And believe me, saving previous value in your table will make you life is easy in future.
In given below code i update field with new one insert data and also append your new data with old I hope this help you
Form from which you insert and update data
if(isset($_POST['submit']) && $_POST['submit']){
$text_field = $_POST['text_field'];
$query ="SELECT * FROM `table_name`"; //replace with your table name
$run=mysqli_query($conn,$query);
$result = mysqli_fetch_row($run);
$data = $result[1];
if(count($result)){
$last_string = $data.','.$text_field;
$update= "UPDATE `table_name` SET `text`='".$last_string."'";
mysqli_query($conn,$update);
}else{
$query = "INSERT INTO `table_name`(`text`) VALUES ('".$text_field."')";
mysqli_query($conn,$query);
}
}
?>
<form action="" method="POST">
<input type="text" name="text_field">
<input type="submit" name="submit">
</form>
view of data which is inserted
<?php
$query ="SELECT * FROM `table_name`";
$run=mysqli_query($conn,$query);
$result = mysqli_fetch_row($run);
if(isset($result) && count($result)){
echo "<p>$result[1]</p>";
}
I want to prevent duplicate values into a database table from a form using PHP.
I have a table data on database that have atribute dataid(auto increment as primary key), data1, data2.
And I have a simple form like this
<h2>Enter your data</h2>
<form action="script.php" method="post">
Data 1:<input type="text" name="data1" /></p>
Data 2:<textarea name="data2"></textarea></p>
<input type="submit" name="submit" value="Add Data" />
</form>
It's script.php for inserting data to database
<?php
if(isset($_POST['submit']))
{
//connect to the database
$conn = mysql_connect('host', 'username', 'password', 'dbname') or die(mysql_error());
//insert results from the form input
$query = "INSERT INTO data(data1, data2) VALUES('$_POST[data1]', '$_POST[data2]')";
$result = mysql_query($conn, $query) or die(mysql_error());
}
?>
but it will insert any data from the form to database.
How can I prevent insert data to database if data1 already exist?
The solution to your problem is to make the column unique so the database takes care of enforcing this constraint. You can do this by creating a unique index or constraint:
alter table data add constraint unq_data_data1 unique (data1);
You can then use this in an insert to ignore duplicates by using on duplicate key update:
INSERT INTO data(data1, data2)
VALUES('$_POST[data1]', '$_POST[data2]')
ON DUPLICATE KEY UPDATE data1 = VALUES(data1);
The ON DUPLICATE KEY part doesn't really do anything. It is a no-op.
Also, you should parameterize your queries, so you are not subject to SQL injection and so the query plans can be cached. But that is another matter.
make column data1 unique
ALTER TABLE `data` ADD UNIQUE (`data1`);
change your query like this to ignore insert when data exist
$query = "INSERT IGNORE INTO data(data1, data2) VALUES('$_POST[data1]', '$_POST[data2]')";
How to loop 2 values from a submitted form that begins with specific names, insert it in a mysql table row and loop for more?
I have a post form with many input select and textareas, in a part of that form there are 2 fields (link, description) then i have a button which generate an extra line with the same fields but adding the number 1 2 3 in the name. So here how it looks like when i click to generate the new line of that 2 fields:
<label for="stack_input"><input id="stack_input" name="extravalue" value="" type="text"></label>
<label for="flow_input"><input id="flow_input" name="secondextravalue" value="" type="text"></label>
<label for="stack_input"><input id="stack_input" name="extravalue1" value="" type="text"></label>
<label for="flow_input"><input id="flow_input" name="secondextravalue1" value="" type="text"></label>
<label for="stack_input"><input id="stack_input" name="extravalue2" value="" type="text"></label>
<label for="flow_input"><input id="flow_input" name="secondextravalue2" value="" type="text"></label>
Now i post the form together with the rest inputs and textareas of the form, but i want those each 2 extra fields at a time to be added to a new database row, as a pair to be added on same row each time. For now i can make a foreach but i can add only 1 of the 2 fields at a time to a new table row.
Here the code to make this happen for 1 field. I say to php to take all post data that begins with "extravalue" which is the first of the two (pair generated) input fields, and each time that find a post value begins with "extravalue" to be inserted in the table. Because each time i generate a new line of that two input fields have as base name "extravalue" and "secondextravalue" respectively and each time add the number 1 2 3 etc at the end of the name. Here the code:
foreach($_POST as $key => $value)
{
if (strpos($key, 'extravalue') === 0)
{
mysql_query("INSERT INTO tablename VALUES ('','','$value','','','')")or die("ADD Error: ".mysql_error());
}
}
Now i want to take each pair of the generated input fields and insert in the database in same row.
So i want to do the following:
For each,
"extravalue" "secondextravalue"
"extravalue1" "secondextravalue1"
"extravalue2" "secondextravalue2"
mysql_query("INSERT INTO tablename VALUES ('','','$value','$value2','','')")or die("ADD Error: ".mysql_error());
mysql_query("INSERT INTO tablename VALUES ('','','$value','$value2','','')")or die("ADD Error: ".mysql_error());
mysql_query("INSERT INTO tablename VALUES ('','','$value','$value2','','')")or die("ADD Error: ".mysql_error());
In short i want to say to php that every time you find values that begin with "extravalue" and "secondextravalue" to insert them in the same table row, and then to loop to continue searching for the next pair of that two values which begins with the same names.
Instead of doing it like this, create the fieldnames as an array: name="extravalue[]"
THat will give you all extra values in an array in your $_POST, allowing you to loop through them at ease, and insert them easily too. Add a counter ($i++;) to the loop, so you can also get the second extra value at ease.
I'm working on a school manager script.
I don't know how to insert a custom unique id of subscription...
I just use this function to show it's unique subscription's id when showing his/her full informations from the database:
$year = date('Y');
$ID = substr($student->dateNaissance,8,10).$student->id_etudiant."/".$year;
The function is combined of 3 things:
The 2 last digits of the year of birth (example: 01/01/1981.. i take only this -->81 using the substr function)
The row id from the table on the database (ex: 50).
And the year of subcription(example: 2013)
all that gives me , for example, as result 8150/2013
what i want here is when inserting the student data into the database , i want this unique ID to be inserted as well..
The problem here is i don't know how to get the last id of a row !
Yeah, I tried to insert the student data and then update the id_subscription using this:
if(isset(....){
......
$mysqli->query("INSERT INTO table (a,b,c, ...etc) VALUES('','',''..etc)");
$year = date('Y');
$mysqli_query("SELECT * FROM table_name");
$studentID = $mysqli_insert_id();
$ID = substr($student->dateNaissance,8,10).$ID."/".$year;
$mysqli->query("UPDATE table_name SET id_subscription = $ID");
}
But its not working :\
By the way: in my table Im using an auto_increment id + the subscription_id in which i want to insert the customized id I showed above.
Assuming that row id is an auto_increment field, then you'd have to do it in two stages:
start transaction
insert everything into the DB EXCEPT your id field
use last_insert_id() to get the mysql-generated ID field
build your own id field
update the record with this new id
commit the transaction.
On Database Structure:
1. you can use auto-incremented primary key in your table and store the data(student_id) as a seperate column(recommended).
On getting 'the last id of a row':
1. Use mysql_insert_id() .. check this out
I have a form where the user inserts data but they can go back to the same page to edit their information. My table structure is:
id (auto int index),
user id (links to other tables),
Doc_Name,
Abstract
I have an insert query:
$user_id = intval($_SESSION['user_id']);
$Doc_Name = mysql_real_escape_string($_POST['Doc_Name']);
$abstract = mysql_real_escape_string($_POST['abstract']);
$the_query = sprintf("INSERT INTO `document` (`user_id`,`Doc_Name`,`abstract`) VALUES
('%d','%s','%s')", $user_id, $Doc_Name, $abstract);
However, if their is already a row for this user_id then I want the update query instead:
mysql_query("UPDATE document SET `Doc_Name` = '$Doc_Name', 'abstract='$abstract'
WHERE id='$_SESSION[user_id]'") or die(mysql_error());
Also, so the user knows what they entered, I tried to use this echo in the text box but that didn't work either,
<textarea name="Doc_Name" style="width:500px; height:150px" type="text" id="Doc_Name"
value="<? echo $row_settings['Doc_Name']; ?>" size="300"> </textarea>
You can use INSERT ... ON DUPLICATE KEY UPDATE Syntax
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html
INSERT INTO table (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE
c=c+1;
You want the INSERT ... ON DUPLICATE UPDATE syntax
for the textarea you can use
<textarea name="Doc_Name" style="width:500px; height:150px" type="text" id="Doc_Name" size="300"><? echo $row_settings['Doc_Name']; ?></textarea>
everything between the tags is displayed and editable
EDIT: to the other posters: nice, did not know INSERT ON DUPLICATE
the query:
SELECT * FROM document WHERE id='{$SESSION['user_id']}'
php:
if(mysql_num_rows(mysql_query($query)) > 0) {
//code to be executed if id exists
}