I am using mPDF for PDF generation in PHP. It is working fine with no issue.
What I want if user is not logged in then I would like to show error in alert box and after that redirect to index.php.
But due to some reason that I don't know it is not showing any alert box nor redirect. It seems like JavaScript is not working.
Here is the code:
<?php
session_start();
$uid=$_SESSION['uid'];
if($uid== "" or $uid == NULL)
{
echo '<script type="text/javascript">window.alert("Please login first to access this page."); </script>';
echo '<script type="text/javascript">window.location.href("/index.php");</script>';
}
Above code is top of the file and now below I have these code for mPDF:
include("pdf/mpdf.php");
$mpdf=new mPDF('');
$stylesheet = file_get_contents('pdf/tablecss.css');
$mpdf->WriteHTML($stylesheet,1);
//==============================================================
//$mpdf->WriteHTML($html);
$mpdf->SetDisplayMode('fullpage');
$mpdf->SetWatermarkText(' www.somewebsite.com ');
$mpdf->watermarkTextAlpha = 0.1;
$mpdf->watermark_font = 'DejaVuSansCondensed';
$mpdf->showWatermarkText = true;
$mpdf->WriteHTML($html);
$html = '
<html>
<head>
<style>
....
I fixed that. What i did is i put mPdf code inside else.
Like this and it works.
if($uid== "" or $uid == NULL)
{
echo '<script type="text/javascript">window.alert("Please login first to access this page."); </script>';
echo '<script type="text/javascript">window.location.replace("/index.php");</script>';
}else{
mpdf code goes here
Related
I have a remove page where it can remove an entry from my database which is pre loaded into the option box. However, it redirects to my 'remove-module-complete.php' page when I type in any random text. I only want it to direct to the 'remove-module-complete.php' if their is that actual entry from the database. My javascript doesn't seem to be working.
I currently have some validation to say that the entry 'didnt match any item' from jQuery but it still directs me to 'module remove complete' if I press submit.
Any help?
Here is my PHP
<?php
if (isset($_POST['submit'])){
$moduleCode = $_POST['moduleCode'];
$moduleCodeLen = strlen($moduleCode);
if ($moduleCodeLen=6){
$sqlTwo = "DELETE FROM MODULES WHERE id = '$moduleCode'";
mysql_query($sqlTwo);
$resTwo =& $db->query($sqlTwo);
if(PEAR::isError($res)){
$errorVar = ($res->getMessage());
echo "<script type='text/javascript'>alert('Invalid entry, please try again. Error code: $errorVar');</script>";
die;
}
else echo "<script> location.replace('http://project.ac.uk/remove-module-complete.php'); </script>";
}
else echo "<script type='text/javascript'>alert('Invalid entry, please try again');</script>";
}
?>
Seems like you have some errors(commented lines):
if (isset($_POST['submit'])) {
$moduleCode = $_POST['moduleCode'];
$moduleCodeLen = strlen($moduleCode);
// '==', not '='
if ($moduleCodeLen==6) {
$sqlTwo = "DELETE FROM MODULES WHERE id = '$moduleCode'";
mysql_query($sqlTwo);
$resTwo =& $db->query($sqlTwo);
// there is no $res variable in the given part of the code
// maybe you need to use $resTwo variable here?
if (PEAR::isError($res)) {
$errorVar = ($res->getMessage());
echo "<script type='text/javascript'>alert('Invalid entry, please try again. Error code: $errorVar');</script>";
die;
}
else echo "<script> location.replace('http://project.ac.uk/remove-module-complete.php'); </script>";
}
else echo "<script type='text/javascript'>alert('Invalid entry, please try again');</script>";
}
Can I trigger the execution of a php file from another php file when performing an action? More specific, I have an anchor generated with echo, that has href to a pdf file. In addition of downloading the pdf I want to insert some information into a table. Here's my code, that doesn't work:
require('./database_connection.php');
$query = "select author,title,link,book_id from book where category='".$_REQUEST['categorie']."'";
$result = mysql_query($query);
$result2 = mysql_query("select user_id from user where username='".$_REQUEST["username"]."'");
$row2 = mysql_fetch_row($result2);
while($row= mysql_fetch_row($result))
{
echo '<h4>'.$row[0].' - '.$row[1].'</h4>';
if(isset($_SESSION["username"]) && !empty($_SESSION["username"]))
{
echo '<input type="hidden" name="id_carte" value="'.$row[3].'">';
echo '<input type="hidden" name="id_user" value="'.$row2[0].'">';
echo ' <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script language="javascript">
function insert_download() {
$.ajax({
type: "GET",
url: "insert_download.php" ,
success : function() {
location.reload();
}
});
}
</script>
<a onclick="insert_download()" href="'.$row[2].'" download> download </a>';
}
And here's the insert_download.php:
<?php
require('./database_connection.php');
$query = "insert into download(user_id,book_id,date)values(".
$_REQUEST["id_carte"].",".
$_REQUEST["id_user"].",".
date("Y-m-d h:i:s").")";
mysql_query($query,$con);
mysql_close($con);
?>
Can anyone help me with this? Thanks!
As I understand correctly, you want to display a link, and when the user clicks that link,
some data is inserted into a database or something;
the user sees a download dialog, allowing him to download a file?
If this is correct, you can use this code:
On your webpage:
download
result.php:
<?php
$file = isset($_GET['file']) ? $_GET['file'] : "";
?>
<!DOCTYPE html>
<html>
<head>
<title>Downloading...</title>
<script type="text/javascript">
function redirect(url) {
//window.location.replace(url);
window.location.href = url;
}
</script>
</head>
<body>
Download is starting...
<script type="text/javascript">
redirect("http://example.com/download.php?file=dummy.pdf");
</script>
</body>
</html>
download.php:
<?php
$file = isset($_GET['file']) ? $_GET['file'] : "nullfile";
$file_url = "download_dir_or_something/".$file;
// Put some line in a log file...
file_put_contents("logfile.txt", "successful on ".date("Y-m-d H:i:s")."\n", FILE_APPEND);
// ...or anything else to execute, for example, inserting data into a database.
header("Content-Type: application/octet-stream");
header("Content-Transfer-Encoding: Binary");
header("Content-disposition: attachment; filename=\"".basename($file_url)."\"");
readfile($file_url);
?>
Why not use a redirection instead of "complicated" AJAX?
<!-- in your first document -->
echo '<input type="hidden" name="id_carte" value="'.$row[3].'">';
echo '<input type="hidden" name="id_user" value="'.$row2[0].'">';
echo 'download';
and in download_pdf.php
<?php
require('./database_connection.php');
...
mysql_close($con);
header("location: " . $_GET['redirect']);
You're lacking basic skill of debugging. If I was you, I should:
Use a browser which supporting, ex: Chrome with "Network" inspecting tab ready
Try click on the link <a onclick="insert_download()" ... and see if the ajax request is performed properly (via Network inspecting tab from your chrome). If not, re-check the generated js, otherwise, something wrong with the download_pdf.php, follow next step
Inspecting download_pdf.php: turn on error reporting on the beginning (put error_reporting(E_ALL); and ini_set('display_errors', 1); on top of your file) try echoing something before and/or after any line you suspect that lead to bugs. Then you can see those ajax response from your Network inspecting tab... By doing so, you're going to narrow down which line/scope of code is causing the problem.
Note that the "echoing" trick can be avoid if you have a solid IDE which is supporting debugger.
Hope it can help
I've been staring at code too long however when I used a simple script to save a form with:
endif;
header('Location: http:/mysite.com/evo/codesaveindex.php');
?>
at the end the page redirected back to itself just fine, however now I have a longer script here I can't quite figure out where or how to code my redirect:
<?php
session_start();
$directory = 'users/'.$_SESSION['username'].'/';
//here you can even check if user selected 'Delete' option:
if($_POST['Action'] == "DELETE"){
$file_to_delete = $_POST['CodeList'];
if(unlink($directory.'/'.$file_to_delete))
echo $file_to_delete." deleted.";
else
echo "Error deleting file ".$file_to_delete;
}
if($_POST['Action'] == "SAVE"){
// If a session already exists, this doesn't have any effect.
session_start();
// Sets the current directory to the directory this script is running in
chdir(dirname(__FILE__));
// Breakpoint
if( empty($_SESSION['username']) || $_SESSION['username'] == '' ) echo 'There is no session username';
if( empty($_POST['CodeDescription']) || $_POST['CodeDescription'] == '' ) echo 'There is no POST desired filename';
// This is assuming we are working from the current directory that is running this PHP file.
$USER_DIRECTORY = 'users/'.$_SESSION['username'];
// Makes the directory if it doesn't exist
if(!is_dir($USER_DIRECTORY)):
mkdir($USER_DIRECTORY);
endif;
// Put together the full path of the file we want to create
$FILENAME = $USER_DIRECTORY.'/'.$_POST['CodeDescription'].'.txt';
if( !is_file( $FILENAME ) ):
// Open the text file, write the contents, and close it.
file_put_contents($FILENAME, $_POST['Code']);
endif;
}
?>
may be you should use querystring variable while redirecting.
if($_POST['Action'] == "DELETE") {
$file_to_delete = $_POST['CodeList'];
if(unlink($directory.'/'.$file_to_delete)) {
header('Location: http:/mysite.com/evo/codesaveindex.php?deleted=1&file='.$file_to_delete);
} else {
header('Location: http:/mysite.com/evo/codesaveindex.php?deleted=0& file='.$file_to_delete);
}
}
In codesaveindex.php:
if(isset($_GET['deleted'])&& $_GET['deleted']==1) {
echo $file_to_delete." deleted.";
} elseif(isset($_GET['deleted'])&& $_GET['deleted']==0) {
echo "Error deleting file ".$file_to_delete;
}
You can't redirect if the page after html has been outputted.
You need to either use output buffering or redirect using javascript,
or organise it so that the redirect happens before the html is shown.
i have a class written for such thing, should be very easy to use class.route.php
simply do this where you want to redirect: route::redirect('page', http_status);
This is a part of my code. The code is moving to the location, but the echo below is not working.
I am sure this header is affecting it somehow
else {
header('location: index.php');
echo '<script>
document.getElementById("nick").value = "invalid email";
document.getElementById("nick").className = "invalidemail";
</script>';
If you read something about header in php functions, you will came to know that nothing gets printed after header as you are giving instructions to redirect on index.php
However to achieve the same, you can use session variables.
So, on the page where you are redirecting to index.php:
$_SESSION['error']=true;
header('location: index.php');
On index.php, check if session variable is true:
if($_SESSION['error']== true)
{
echo '<script type="text/javascript">
document.getElementById("nick").value = "invalid email";
document.getElementById("nick").className = "invalidemail";
</script>';
}
i have referred to this two questions call php page under Javascript function and Go to URL after OK button in alert is pressed. i want to redirect to my index.php after an alert box is called. my alert box is in my else statement. below is my code:
processor.php
if (!empty($name) && !empty($email) && !empty($office_id) && !empty($title) && !empty($var_title) && !empty($var_story) && !empty($var_task) && !empty($var_power) && !empty($var_solve) && !empty($var_result)) {
(some imagecreatefromjpeg code here)
else{
echo '<script type="text/javascript">';
echo 'alert("review your answer")';
echo 'window.location= "index.php"';
echo '</script>';
}
it's not displ ying anything(no alert box and not redirecting). when i delet this part echo 'window.location= "index.php"'; it's showing the alert. but still not redirecting to index.php. hope you can help me with this. please dont mark as duplicate as i have made tose posts as reference. thank you so much for your help.
You're missing semi-colons after your javascript lines. Also, window.location should have .href or .replace etc to redirect - See this post for more information.
echo '<script type="text/javascript">';
echo 'alert("review your answer");';
echo 'window.location.href = "index.php";';
echo '</script>';
For clarity, try leaving PHP tags for this:
?>
<script type="text/javascript">
alert("review your answer");
window.location.href = "index.php";
</script>
<?php
NOTE: semi colons on seperate lines are optional, but encouraged - however as in the comments below, PHP won't break lines in the first example here but will in the second, so semi-colons are required in the first example.
if (window.confirm('Really go to another page?'))
{
alert('message');
window.location = '/some/url';
}
else
{
die();
}
window.location = mypage.href is a direct command for the browser to dump it's contents and start loading up some more. So for better clarification, here's what's happening in your PHP script:
echo '<script type="text/javascript">';
echo 'alert("review your answer");';
echo 'window.location = "index.php";';
echo '</script>';
1) prepare to accept a modification or addition to the current Javascript cache.
2) show the alert
3) dump everything in browser memory and get ready for some more (albeit an older method of loading a new URL
(AND NOTICE that there are no "\n" (new line) indicators between the lines and is therefore causing some havoc in the JS decoder.
Let me suggest that you do this another way..
echo '<script type="text/javascript">\n';
echo 'alert("review your answer");\n';
echo 'document.location.href = "index.php";\n';
echo '</script>\n';
1) prepare to accept a modification or addition to the current Javascript cache.
2) show the alert
3) dump everything in browser memory and get ready for some more (in a better fashion than before) And WOW - it all works because the JS decoder can see that each command is anow a new line.
Best of luck!
Like that, both of the sentences will be executed even before the page has finished loading.
Here is your error, you are missing a ';'
Change:
echo 'alert("review your answer")';
echo 'window.location= "index.php"';
To:
echo 'alert("review your answer");';
echo 'window.location= "index.php";';
Then a suggestion:
You really should trigger that logic after some event. So, for instance:
document.getElementById("myBtn").onclick=function(){
alert("review your answer");
window.location= "index.php";
};
Another suggestion, use jQuery
Working example in php.
First Alert then Redirect works.... Enjoy...
echo "<script>";
echo " alert('Import has successfully Done.');
window.location.href='".site_url('home')."';
</script>";
<head>
<script>
function myFunction() {
var x;
var r = confirm("Do you want to clear data?");
if (r == true) {
x = "Your Data is Cleared";
window.location.href = "firstpage.php";
}
else {
x = "You pressed Cancel!";
}
document.getElementById("demo").innerHTML = x;
}
</script>
</head>
<body>
<button onclick="myFunction()">Retest</button>
<p id="demo"></p>
</body>
</html>
This will redirect to new php page.