I have problem in print PDF from forms.
When new user go to my site and fill the forms and click submit to send data, i need to get this data in PDF file, So i can get the data for this user from :-
$lastid = mysql_insert_id();
But this i think is not good, When any other user go in this form and click print PDF, he get the last id.
So what can i do to delete the last id and cannot print any data for any user else have fill forms ??
I assume that you are getting data into $lastid because of mysql query execution if that so your query will be executed every time and the result will change depending upon users and their requirement.
But if you still want to do so you can use unset() function of php.
unset() destroys the specified variables. The behavior of unset() inside of a function can vary depending on what type of variable you are attempting to destroy. If a globalized variable is unset() inside of a function, only the local variable is destroyed. The variable in the calling environment will retain the same value as before unset() was called.
To unset() a global variable inside of a function, then use the $GLOBALS array to do so:
<?php
function foo()
{
unset($GLOBALS['bar']);
}
$bar = "something";
foo();
?>
Complete documentation can be found over here
Related
I want to add different stuffs to costumers cart but before adding the stuff transition in the database costumer must pay and then redirect to another page after Successful transition i need the chosen stuffs id's i tried using $_POST but the browser does not send the post value because of payment system in the middle i tried using sessions instead
I want to add array of integers to a session control i already tried using this code
$t=array(1,2,3,4,5);
$_SESSION['exam_id']=$t
I don't know if i can do such a thing or not but what is the parallels
What you specified is working correctly. Sessions can hold arrays.
The session superglobal is an represented as an array itself within PHP, so you can just get and set values by doing the following
Setting:
$_SESSION['exam_id'][] = "new value";
or
$_SESSION['exam_id'] = array("new value", "another value");
Getting:
$_SESSION['exam_id'][0]; // returns a value
This returns the first value in the exam_id array within the session variable
You will need to start the session. Make your code;
<?php
session_start();
$t = array(1,2,3,4,5);
$_SESSION['exam_id'] = $t;
You need session_start()
You didn't have a semi-colon ; at the end.
you can use array in session like this..
you have to start session with session_start();
and then store your array to session $_SESSION['items'][] = $item;
and then you use it, whenever you want:
foreach($_SESSION['items'][] as $item)
{
echo $item;
}
You can set PHP sessions equal to an array just like you're doing.
To set the $_SESSION variable equal to all POST data, you can do this:
$_SESSION['exam_id'] = $_POST;
Be sure to add session_start() prior to declaring any session variables.
$t=array(1,2,3,4,5);
$_SESSION['exam_id'] = array();
array_push($_SESSION['exam_id'],$t[0]);
array_push($_SESSION['exam_id'],$t[1]);
array_push($_SESSION['exam_id'],$t[2]);
array_push($_SESSION['exam_id'],$t[3]);
array_push($_SESSION['exam_id'],$t[4]);
Let me first say I've spent a day reading three google pages of articles on this subject, as well as studied this page here.
Ok, here's my dilemma. I have two functions. Both called upon via AJAX. This first one assigns a value to the variable and the second one uses that variable. Both functions are triggered by two separate buttons and need to stay that way. The AJAX and the firing off of the functions work fine, but the variable isn't passed. Here is my code:
if( $_REQUEST["subjectLine"] ) //initiate first function
{
$CID = wpCreateChimpCampaign();
echo $CID; //this works
}
if( $_REQUEST["testEmails"] ) //initiate second function
{
echo $CID; //does not return anything but should contain "apple"
wpSendChimpTest($CID);
}
function wpCreateChimpCampaign () //first function
{
$CID = "apple";
return $CID;
}
function wpSendChimpTest ($CID) //second function
{
echo $CID; //does not return anything but should contain "apple"
}
I'm open to using a class but I haven't had much luck there either. I was hoping to solve this issue without using classes. Thanks for the help in advance!
If you are making 2 separate calls to this file, it may be helpful for you to visualise this as being 2 functions in 2 totally separate files. Although they exist in the same PHP file, because they used called in different calls, they don't retain the value of the variable $CID. Once the file has run, the variable is destroyed and when you call the file again, the value is null again.
So you need to store that variable between calls. You can either store it in a database or store it in a session variable.
So call session_start(); at the beginning of the file, then rather than use $CID, just use $_SESSION['CID'];
I'm not sure where the hold up is. The code you have will work:
$CID = wpCreateChimpCampaign(); // returns 'apple'
wpSendChimpTest($CID); // echos 'apple'
The code looks fine, but are you certain that all requirements are being met so both functions execute?
In other words are you supplying values for both $_REQUEST["subjectLine"] and $_REQUEST["testEmails"]?
I have an html page with a form. In the form I have a search function and a delete function that will be available in each results’ row, in this way:
..<td><img src="delete.gif" style="cursor: pointer" onClick="javascript:delete();"></td>..
<input type="submit" value="search" onClick="javascript:search();">
In a . js file I have both functions passing the parameters to a php file via jquery’s ajax function.
Let’s go to the php file:
There are no problems with the search function: I get the parameters by $_REQUEST and I do a select query.
By clicking delete.gif in the form, I get to the delete function. The query deletes the selected row and right after I need to call the search function so I can show the results without the deleted row.
And here comes the trouble: both functions use $_REQUEST to build the queries so when calling search function after deleting I have the delete parameters stored in $_REQUEST.
How can I recover the search parameters I had in $_REQUEST in the first search so I can do that search again after deleting??
Here’s a glimpse of the delete function in the php file:
function deleteResult($_REQUEST['param1'],$_REQUEST['param2'], $_REQUEST['param3'])
{
$strSqlDelete = "DELETE FROM …"; // query working in database
//here the connecting to the database code
$result = search($_REQUEST['param1'],$_REQUEST['param2'], $_REQUEST['param3']);
echo utf8_encode($result);
exit();
}
Thanks a lot!!
It's not too safe to use $_REQUEST superglobal. Use $_POST or $_GET depending on your method. To store something for later use use $_SESSION suberglobal array.
session_start(); // In the beginning of your script
...
$_SESSION['param1'] = $_REQUEST['param1'];
Then you can use $_SESSION['param1'] anywhere else within your site even after page reloading.
Store it in the local variables or you can store them into the cookies. So that you can use it as many times you want.
you can also do that by javascript
it's prefer to delete this row by deleting it instead of calling server side again to render the result again
now you save unwanted hit to server side
FOR EXAMPLE
// in JS
function delete(this){
$.ajax({}); // call ajax to delete from server side (php)<br>
delete this row (tr);<br>
}
I am trying to do a variable_set() when clicking 'Reset default values' on my module's admin page form. This runs through system_settings_form_submit(). The #default_value inside my form is reset, but my module relies on this stored variable to display some data. Clicking reset fills in the form with the default, but does not 'Save' it to recreate the variable in the database, so my module's function breaks. It appears that nothing happens after clicking Reset, other than it deleting the variable from the database. Thanks in advance.
My submit function looks like this:
function faculty_submit(&$form, &$form_state){
if($form_state['values']['op'] == 'Reset to defaults') {
global $faculty_detail_template_default;
variable_set('faculty_detail_template', $faculty_detail_template_default);
}
elseif ($form_state['values']['op'] == 'Save configuration') {
// Clear caches for list and detail pages.
cache_clear_all('faculty_list', 'cache', TRUE);
cache_clear_all('faculty_detail_load', 'cache', TRUE);
}
}
First of all that's what system_settings_form_submit does when you press the Reset to defaults button. It calls variable_del which will delete all your defined variables in the form from the variables table.
Now your form's #default value is probably filled because you do something like this:
global $faculty_detail_template_default;
$form = array (
'#default_value' => variable_get('faculty_detail_template', $faculty_detail_template_default),
);
I don't see why you insist of adding a default value in the variables table. This entire approach is flawed. Just use variable_get($name, $default) wherever your code depends on faculty_detail_template. That's precisely what the second parameter of this function is used for: $default The default value to use if this variable has never been set. So for Drupal, the absence of a variable from the variable table means it's up to the coder how to handle this case (provide a default for example). Default value which is specified using variable_get.
Second, if you used system_settings_form then you already have a submit function, the one mentioned above (system_settings_form_submit) so your faculty_submit won't be called unless you add it specifically to the array of submit callbacks to be executed. Something like this:
$form['#submit'][] = 'faculty_submit';
return system_settings_form($form);
BTW, using global variables is a bad idea (in general) and you should try to avoid using them. That's what variables are used for :) Pieces of information which can be retrieved in different parts of the code. So instead add a .install file to your module and in that file you define these global variables using variable_set. This is a lot cleaner than just magically popping some global variables in the middle of the code.
you need to use &$form_state['values']['yourVariableNameOfForm'] instead of what I have made bold below.
variable_set('faculty_detail_template', $faculty_detail_template_default);
In my project, I am using pagination and I used these statements to get the page number detail:
$page=$this->uri->segment(3);
$this->session->set_userdata('page',$page);
echo $this->session->userdata('page');
When I print this session value in that page itself, I get the value correctly and when I click on the particular link and then print that data, I am getting the value like 'images'.
Why is this happening?
However, when I write the statements like
$page=$this->uri->segment(2);
$this->session->set_userdata('page',$page);
echo $this->session->userdata('page');
it's working fine.
My URL is: http://localhost/CI/user/index/4
I have the same problem with you, the session variable always get value 'images'. Then i realize that: if we made a session variable, then we must call redirect() directly.
This is my example:
$page=$this->uri->segment(3);
$this->session->set_userdata('page',$page);
redirect('control/function2');
Then, you can get continue your code in the 'function2'.
Solved the issue by writing another function, setting the session and redirecting to above function like this:
function set_session(){
$id=$this->uri->segment(3);
$this->session->set_userdata('id',$id);
redirect('set_uri_session');
}
function set_uri_session(){
$id=$this->uri->segment(3);
$this->session->set_userdata('id',$id);
echo $this->session->userdata('id');
}