I have my index.php page that sends values over to edit.php via $_GET/html link. I can see the values go, including the table ID I want to use using echo statements. The problem is that I need the specific ID value used in another form using a submit form($_POST). I've tried different approaches including SESSION, making the $ID = $_GET.... I'm pulling my hair out.
Here is the order of things:
//Edit link on index.php sends the id='summary_id', which works
<td align="center">Edit</td>
//Edit.php grabs the variable and I set it to that variable
if(isset($_GET['id']))
echo "<pre>Value of GET \$_GET:</br>";print_r($_GET);echo"</pre>";
{
$summary_id = $_GET['id'];
$summary_id = $_POST['summary_id'];
But, when I try to use $summary_id in a form (using $_POST this time), I get no value. I'm not sure if what I'm trying to do is "legal". I've tried sending the summary_id as a hidden value in the form, but again, nothing is going through. I'm losing it after that initial $_GET.
You are doing wrong.You are overwriting the variable that is not available $_POST['summary_id']
if you really want to use post method use this
<form action="edit.php" method="POST">
<input type="hidden" value="<?php echo $row['summary_id'];?>" name="summary_id"/>
<input type="submit" value="EDIT"/>
</form>
or you can use header() to post the value
You are overwriting your own variable. Also, it's clear from this that you don't actually have PHP errors turned on.
You could use $_REQUEST instead as it contains both $_GET and $_POST.
Related
It seems pretty simple but I can't find a good way to do it.
Say in the first page I create a variable
$myVariable = "Some text";
And the form's action for that page is "Page2.php". So in Page2.php, how can I have access to that variable? I know I can do it with sessions but I think it's too much for a simple string, and I do only need to pass a simple string (a file name).
How can I achieve this?
Thanks!
HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
Session:
//On page 1
$_SESSION['varname'] = $var_value;
//On page 2
$var_value = $_SESSION['varname'];
Remember to run the session_start(); statement on both these pages before you try to access the $_SESSION array, and also before any output is sent to the browser.
Cookie:
//One page 1
$_COOKIE['varname'] = $var_value;
//On page 2
$var_value = $_COOKIE['varname'];
The big difference between sessions and cookies is that the value of the variable will be stored on the server if you're using sessions, and on the client if you're using cookies. I can't think of any good reason to use cookies instead of sessions, except if you want data to persist between sessions, but even then it's perhaps better to store it in a DB, and retrieve it based on a username or id.
GET and POST
You can add the variable in the link to the next page:
Page2
This will create a GET variable.
Another way is to include a hidden field in a form that submits to page two:
<form method="get" action="page2.php">
<input type="hidden" name="varname" value="var_value">
<input type="submit">
</form>
And then on page two:
//Using GET
$var_value = $_GET['varname'];
//Using POST
$var_value = $_POST['varname'];
//Using GET, POST or COOKIE.
$var_value = $_REQUEST['varname'];
Just change the method for the form to post if you want to do it via post. Both are equally insecure, although GET is easier to hack.
The fact that each new request is, except for session data, a totally new instance of the script caught me when I first started coding in PHP. Once you get used to it, it's quite simple though.
Thanks for the answers above. Here's how I did it, I hope it helps those who follow. I'm looking to pass a registration number from one page to another, hence regName and regValue:
Create your first page, call it set_reg.php:
<?php
session_start();
$_SESSION['regName'] = $regValue;
?>
<form method="get" action="get_reg.php">
<input type="text" name="regName" value="">
<input type="submit">
</form>
Create your second page, call it get_reg.php:
<?php
session_start();
$regValue = $_GET['regName'];
echo "Your registration is: ".$regValue.".";
?>
<p>Back to set_reg.php
Although not as comprehensive as the answer above, for my purposes this illustrates in simple fashion the relationship between the various elements.
Passing data in the request
You could either embed it as a hidden field in your form, or add it your forms action URL
echo '<input type="hidden" name="myVariable" value="'.
htmlentities($myVariable).'">';
or
echo '<form method="POST" action="Page2.php?myVariable='.
urlencode($myVariable).'">";
Note this also illustrates the use of htmlentities and urlencode when passing data around.
Passing data in the session
If the data doesn't need to be passed to the client side, then sessions may be more appropriate. Simply call session_start() at the start of each page, and you can get and set data into the $_SESSION array.
Security
Since you state your value is actually a filename, you need to be aware of the security ramifications. If the filename has arrived from the client side, assume the user has tampered with the value. Check it for validity! What happens when the user passes the path to an important system file, or a file under their control? Can your script be used to "probe" the server for files that do or do not exist?
As you are clearly just getting started here, its worth reminding that this goes for any data which arrives in $_GET, $_POST or $_COOKIE - assume your worst enemy crafted the contents of those arrays, and code accordingly!
There are three method to pass value in php.
By post
By get
By making session variable
These three method are used for different purpose.For example if we want to receive our value on next page then we can use 'post' ($_POST) method as:-
$a=$_POST['field-name'];
If we require the value of variable on more than one page than we can use session variable as:-
$a=$_SESSION['field-name];
Before using this Syntax for creating SESSION variable we first have to add this tag at the very beginning of our php page
session_start();
GET method are generally used to print data on same page which used to take input from user. Its syntax is as:
$a=$_GET['field-name'];
POST method are generally consume more secure than GET because when we use Get method than it can display the data in URL bar.If the data is more sensitive data like password then it can be inggeris.
try this code
using hidden field we can pass php varibale to another page
page1.php
<?php $myVariable = "Some text";?>
<form method="post" action="page2.php">
<input type="hidden" name="text" value="<?php echo $myVariable; ?>">
<button type="submit">Submit</button>
</form>
pass php variable to hidden field value so you can access this variable into another page
page2.php
<?php
$text=$_POST['text'];
echo $text;
?>
Sessions would be the only good way, you could also use GET/POST but that would be potentially insecure.
**page 1**
<form action="exapmple.php?variable_name=$value" method="POST">
<button>
<input type="hidden" name="x">
</button>
</form>`
page 2
if(isset($_POST['x'])) {
$new_value=$_GET['variable_name'];
}
It works.
Send data throw URL, without form.
$upit = "SELECT * FROM usluga";
$data = $mysql->query($upit);
while ($row = mysqli_fetch_object($data))
{
echo "<a href='"."index.php?tretmanId=$row->tretman_id"."'>$row->naziv</a>";
echo "<br><br>";
}
and you can get this value on the target page with "$_GET['name from URL']", like this
$TrermanIdFromUrl = $_GET['tretmanId'];
You can for example call the page you want by including variables in the url:
header("Location: ../signup.php?newpwd=passwordupdated");
And on your signup.php page, you would have
if (isset($_GET['newpwd']) && $_GET['newpwd'] == "passwordupdated") {
//code here
}
It seems pretty simple but I can't find a good way to do it.
Say in the first page I create a variable
$myVariable = "Some text";
And the form's action for that page is "Page2.php". So in Page2.php, how can I have access to that variable? I know I can do it with sessions but I think it's too much for a simple string, and I do only need to pass a simple string (a file name).
How can I achieve this?
Thanks!
HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
Session:
//On page 1
$_SESSION['varname'] = $var_value;
//On page 2
$var_value = $_SESSION['varname'];
Remember to run the session_start(); statement on both these pages before you try to access the $_SESSION array, and also before any output is sent to the browser.
Cookie:
//One page 1
$_COOKIE['varname'] = $var_value;
//On page 2
$var_value = $_COOKIE['varname'];
The big difference between sessions and cookies is that the value of the variable will be stored on the server if you're using sessions, and on the client if you're using cookies. I can't think of any good reason to use cookies instead of sessions, except if you want data to persist between sessions, but even then it's perhaps better to store it in a DB, and retrieve it based on a username or id.
GET and POST
You can add the variable in the link to the next page:
Page2
This will create a GET variable.
Another way is to include a hidden field in a form that submits to page two:
<form method="get" action="page2.php">
<input type="hidden" name="varname" value="var_value">
<input type="submit">
</form>
And then on page two:
//Using GET
$var_value = $_GET['varname'];
//Using POST
$var_value = $_POST['varname'];
//Using GET, POST or COOKIE.
$var_value = $_REQUEST['varname'];
Just change the method for the form to post if you want to do it via post. Both are equally insecure, although GET is easier to hack.
The fact that each new request is, except for session data, a totally new instance of the script caught me when I first started coding in PHP. Once you get used to it, it's quite simple though.
Thanks for the answers above. Here's how I did it, I hope it helps those who follow. I'm looking to pass a registration number from one page to another, hence regName and regValue:
Create your first page, call it set_reg.php:
<?php
session_start();
$_SESSION['regName'] = $regValue;
?>
<form method="get" action="get_reg.php">
<input type="text" name="regName" value="">
<input type="submit">
</form>
Create your second page, call it get_reg.php:
<?php
session_start();
$regValue = $_GET['regName'];
echo "Your registration is: ".$regValue.".";
?>
<p>Back to set_reg.php
Although not as comprehensive as the answer above, for my purposes this illustrates in simple fashion the relationship between the various elements.
Passing data in the request
You could either embed it as a hidden field in your form, or add it your forms action URL
echo '<input type="hidden" name="myVariable" value="'.
htmlentities($myVariable).'">';
or
echo '<form method="POST" action="Page2.php?myVariable='.
urlencode($myVariable).'">";
Note this also illustrates the use of htmlentities and urlencode when passing data around.
Passing data in the session
If the data doesn't need to be passed to the client side, then sessions may be more appropriate. Simply call session_start() at the start of each page, and you can get and set data into the $_SESSION array.
Security
Since you state your value is actually a filename, you need to be aware of the security ramifications. If the filename has arrived from the client side, assume the user has tampered with the value. Check it for validity! What happens when the user passes the path to an important system file, or a file under their control? Can your script be used to "probe" the server for files that do or do not exist?
As you are clearly just getting started here, its worth reminding that this goes for any data which arrives in $_GET, $_POST or $_COOKIE - assume your worst enemy crafted the contents of those arrays, and code accordingly!
There are three method to pass value in php.
By post
By get
By making session variable
These three method are used for different purpose.For example if we want to receive our value on next page then we can use 'post' ($_POST) method as:-
$a=$_POST['field-name'];
If we require the value of variable on more than one page than we can use session variable as:-
$a=$_SESSION['field-name];
Before using this Syntax for creating SESSION variable we first have to add this tag at the very beginning of our php page
session_start();
GET method are generally used to print data on same page which used to take input from user. Its syntax is as:
$a=$_GET['field-name'];
POST method are generally consume more secure than GET because when we use Get method than it can display the data in URL bar.If the data is more sensitive data like password then it can be inggeris.
try this code
using hidden field we can pass php varibale to another page
page1.php
<?php $myVariable = "Some text";?>
<form method="post" action="page2.php">
<input type="hidden" name="text" value="<?php echo $myVariable; ?>">
<button type="submit">Submit</button>
</form>
pass php variable to hidden field value so you can access this variable into another page
page2.php
<?php
$text=$_POST['text'];
echo $text;
?>
Sessions would be the only good way, you could also use GET/POST but that would be potentially insecure.
**page 1**
<form action="exapmple.php?variable_name=$value" method="POST">
<button>
<input type="hidden" name="x">
</button>
</form>`
page 2
if(isset($_POST['x'])) {
$new_value=$_GET['variable_name'];
}
It works.
Send data throw URL, without form.
$upit = "SELECT * FROM usluga";
$data = $mysql->query($upit);
while ($row = mysqli_fetch_object($data))
{
echo "<a href='"."index.php?tretmanId=$row->tretman_id"."'>$row->naziv</a>";
echo "<br><br>";
}
and you can get this value on the target page with "$_GET['name from URL']", like this
$TrermanIdFromUrl = $_GET['tretmanId'];
You can for example call the page you want by including variables in the url:
header("Location: ../signup.php?newpwd=passwordupdated");
And on your signup.php page, you would have
if (isset($_GET['newpwd']) && $_GET['newpwd'] == "passwordupdated") {
//code here
}
I have a have in PHP and I have common fields such as 'Name' and 'Surname'.
Now when the user visits the page e.g. http://www.example.com/form.php the form fields 'Name' and 'Surname' are empty.
I would like to now have a link similar to this http://www.example.com/form.php?name=John
so that when the client hits the link the PHP form will now have the name field already filled with 'John' in it.
I know this can be done in HTML but how can I do it in PHP?
Just to let to know I do not own the PHP form - I just want a link from my website to fill the PHP form (which I do not have control over).
Thanks in advance.
Can be done using $_GET
An associative array of variables passed to the current script via the URL parameters.
e.g.:
<? php
if(isset($_GET['name']))
{
$test = $_GET['name'];
}
?>
<html>
<body>
<form>
<input type="text" name="test" value="<?php if(isset($test)){echo "$test";}?>"/>
</form>
</body>
</html>
Note: code isnt tested or anything.. Also, there are possible security risks with getting values from your URL (can be considered user input), so make sure you are aware of that and how to prevent
You could store that value and then when you're about to output the input fields
you just pass along the stored value.
$name = $_GET['name'];
// ... later on
echo '<input type="text" value="'.$name.'"/>';
By using $_GET superglobal
<input name="name" value="<?php echo !empty($_GET['name']) ? $_GET['name'] : '';?>" />
<input name="surname" value="<?php echo !empty($_GET['surname']) ? $_GET['surname'] : '';?>" />
You can use the get method in php to get the name and make use of it
You can retrive this information by the $_GET["name"] function, or $_REQUEST["name"].
Reserver variables
Be carefull with those operations, you might have validation a/o security problem.
Note: if you are not sure that the "name" variable is set or not, you have to use also the
isset function to test it.
You can use the $_GET superglobal, so your input could look like this:
<input type="text" name="name" value="<?php if(isset($_GET['name'])) { echo $_GET['name']; } ?>" />
The $_REQUEST superglobal does a similar thing but I would just use $_GET.
It looks like everyone's answers here assume you are building the form yourself, which doesn't appear to be the case based on your question.
The thing that you want to do may or may not be possible. If the form accepts certain kinds of parameters in certain ways, you may be able to hook in to that functionality and set it up so that when someone clicks a link on your page, that information gets passed to the other page.
One way forms can accept this information is in the form of a "get" request. With this method, values are passed as part of the url, as in your example: http://www.example.com/form.php?name=John. Assuming your page has access to a php variable called $name, you can create a link from your code to build this kind of url like this:
Sign up!
If the page does not accept get parameters in this way (and I have a hard time imagining that they would), you may have to try other techniques to send along the information (assuming that they will even accept it!). The two other ways I imagine you could do this are by passing the value with "post" or creating a cookie for the page. If you tell us what page you are trying to set up this behavior on, we might be able to examine it and give you a better answer.
I have a page in php that gets from the url such as this code example
<form action="welcome.php" method="get">
//some interesting code here
</form>
The issue now is that when i do the GET depending on its value I need to do a POST,
How can I use action="get" and action="post" in the same page?, I am kind of new to PHP so I am not sure if I can use two tags ("i dont think so but please correct me if i am wrong").
PS: I am getting to the same page "welcome.php" and posting to itself again, and depending on the value I am going to show different content.
Thank you
Your question is a little unclear, but if I'm understanding it correctly, you can certainly pass GET variables via the form's action:
<form action="welcome.php?these=are&get=variables" method="post">
//some interesting code here
</form>
You may access both through $_REQUEST if necessary. So no matter what your method type is, $_REQUEST will contain all of your submitted values. This way you don't need to determine whether it was by post, or by get that the data was submitted.
You will have to trap the $_GET value as a hidden var, so when the post is submitted again, your $_GET value will be available:
if (array_key_exists('myVar', $_GET)) {
echo '<input type="hidden" name="myVar" value="' . $_GET['myVar'] .'" />
}
// Now when you resubmit the form you should have access to 'myVar'
echo $_REQUEST['myVar'];
You could also add the get value to the session super global:
if (array_key_exists('myVar', $_GET)) {
$_SESSION['myVar'] = $_GET['myVar'];
}
// Now when you resubmit the form you should have access to 'myVar'
echo $_SESSION['myVar'];
It seems pretty simple but I can't find a good way to do it.
Say in the first page I create a variable
$myVariable = "Some text";
And the form's action for that page is "Page2.php". So in Page2.php, how can I have access to that variable? I know I can do it with sessions but I think it's too much for a simple string, and I do only need to pass a simple string (a file name).
How can I achieve this?
Thanks!
HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
Session:
//On page 1
$_SESSION['varname'] = $var_value;
//On page 2
$var_value = $_SESSION['varname'];
Remember to run the session_start(); statement on both these pages before you try to access the $_SESSION array, and also before any output is sent to the browser.
Cookie:
//One page 1
$_COOKIE['varname'] = $var_value;
//On page 2
$var_value = $_COOKIE['varname'];
The big difference between sessions and cookies is that the value of the variable will be stored on the server if you're using sessions, and on the client if you're using cookies. I can't think of any good reason to use cookies instead of sessions, except if you want data to persist between sessions, but even then it's perhaps better to store it in a DB, and retrieve it based on a username or id.
GET and POST
You can add the variable in the link to the next page:
Page2
This will create a GET variable.
Another way is to include a hidden field in a form that submits to page two:
<form method="get" action="page2.php">
<input type="hidden" name="varname" value="var_value">
<input type="submit">
</form>
And then on page two:
//Using GET
$var_value = $_GET['varname'];
//Using POST
$var_value = $_POST['varname'];
//Using GET, POST or COOKIE.
$var_value = $_REQUEST['varname'];
Just change the method for the form to post if you want to do it via post. Both are equally insecure, although GET is easier to hack.
The fact that each new request is, except for session data, a totally new instance of the script caught me when I first started coding in PHP. Once you get used to it, it's quite simple though.
Thanks for the answers above. Here's how I did it, I hope it helps those who follow. I'm looking to pass a registration number from one page to another, hence regName and regValue:
Create your first page, call it set_reg.php:
<?php
session_start();
$_SESSION['regName'] = $regValue;
?>
<form method="get" action="get_reg.php">
<input type="text" name="regName" value="">
<input type="submit">
</form>
Create your second page, call it get_reg.php:
<?php
session_start();
$regValue = $_GET['regName'];
echo "Your registration is: ".$regValue.".";
?>
<p>Back to set_reg.php
Although not as comprehensive as the answer above, for my purposes this illustrates in simple fashion the relationship between the various elements.
Passing data in the request
You could either embed it as a hidden field in your form, or add it your forms action URL
echo '<input type="hidden" name="myVariable" value="'.
htmlentities($myVariable).'">';
or
echo '<form method="POST" action="Page2.php?myVariable='.
urlencode($myVariable).'">";
Note this also illustrates the use of htmlentities and urlencode when passing data around.
Passing data in the session
If the data doesn't need to be passed to the client side, then sessions may be more appropriate. Simply call session_start() at the start of each page, and you can get and set data into the $_SESSION array.
Security
Since you state your value is actually a filename, you need to be aware of the security ramifications. If the filename has arrived from the client side, assume the user has tampered with the value. Check it for validity! What happens when the user passes the path to an important system file, or a file under their control? Can your script be used to "probe" the server for files that do or do not exist?
As you are clearly just getting started here, its worth reminding that this goes for any data which arrives in $_GET, $_POST or $_COOKIE - assume your worst enemy crafted the contents of those arrays, and code accordingly!
There are three method to pass value in php.
By post
By get
By making session variable
These three method are used for different purpose.For example if we want to receive our value on next page then we can use 'post' ($_POST) method as:-
$a=$_POST['field-name'];
If we require the value of variable on more than one page than we can use session variable as:-
$a=$_SESSION['field-name];
Before using this Syntax for creating SESSION variable we first have to add this tag at the very beginning of our php page
session_start();
GET method are generally used to print data on same page which used to take input from user. Its syntax is as:
$a=$_GET['field-name'];
POST method are generally consume more secure than GET because when we use Get method than it can display the data in URL bar.If the data is more sensitive data like password then it can be inggeris.
try this code
using hidden field we can pass php varibale to another page
page1.php
<?php $myVariable = "Some text";?>
<form method="post" action="page2.php">
<input type="hidden" name="text" value="<?php echo $myVariable; ?>">
<button type="submit">Submit</button>
</form>
pass php variable to hidden field value so you can access this variable into another page
page2.php
<?php
$text=$_POST['text'];
echo $text;
?>
Sessions would be the only good way, you could also use GET/POST but that would be potentially insecure.
**page 1**
<form action="exapmple.php?variable_name=$value" method="POST">
<button>
<input type="hidden" name="x">
</button>
</form>`
page 2
if(isset($_POST['x'])) {
$new_value=$_GET['variable_name'];
}
It works.
Send data throw URL, without form.
$upit = "SELECT * FROM usluga";
$data = $mysql->query($upit);
while ($row = mysqli_fetch_object($data))
{
echo "<a href='"."index.php?tretmanId=$row->tretman_id"."'>$row->naziv</a>";
echo "<br><br>";
}
and you can get this value on the target page with "$_GET['name from URL']", like this
$TrermanIdFromUrl = $_GET['tretmanId'];
You can for example call the page you want by including variables in the url:
header("Location: ../signup.php?newpwd=passwordupdated");
And on your signup.php page, you would have
if (isset($_GET['newpwd']) && $_GET['newpwd'] == "passwordupdated") {
//code here
}