In my php script I have additional variables I don't want visible to the user to be sent in a _post from a to another php script. How do I do that?
Hidden input fields:
<input type="hidden" name="var" value="..." />
use sessions (pros: does not need to be reposted, stays in php between scripts)
use input hidden html fields
Related
I'm trying to create a cookie for a web page. The cookie value will vary based on the users name. Does PHP have an input type function? I just want to add an input field to the page an then the PHP will use that to define the users name for the page. I have the create cookie code, just can't figure out how to get the name from the screen and insert it to the cookie code. Appreciate any suggestions. This is on a WP website.
Not natively because php does not execute in browser, it executes on your server, but it can be used to write an HTML input.
The syntax would look something like this:
echo '<input type="text" name="myinput">';
or
?>
<input type="text" name="myinput">
<?php
You would then use a form post, CURL, or AJAX function to send the data back to the server where a second PHP script would process the input.
That said, it would help to post your create cookie code, since you may not even need to send it back to the server, but just handle it all in the browser using Javascript in which case your submit button only needs to pass the input to a Javascript function instead of posting it.
Is this something you are looking for?
Here it just takes the value user input from the browser and set it as a cookie
<?php
if(isset($_POST['name']) && !empty($_POST['name'])){
setcookie('setcookie_name',$_POST['name']); // setting cookie
}
?>
<form action="" method="post">
<input name="name" value="" placeholder="Enter your name" />
<input name="submit" type="submit" value="Submit"/>
</form>
How can I submit a form to itself without clearing the data in the fields using HTML, javascript and PHP?
You could take different approaches (e.g. cookies, jquery, etc...), however HTML + a line in PHP are more than enough in this case. Try this example code:
<form name="test" method="post">
Your Name: <input type="text" name="YourName" <?php if (isset($_POST['YourName'])) echo 'value="'.$_POST['YourName'].'"';?> >
<input type="submit" value="Submit">
</form>
In the code above if something has been posted to the receiving page (that can be the same page, such as in your case), then the posted value is printed out in the corresponding field. You can use this approach for all the fields composing your form.
If you want, you can also use similarly the $_GET method in the form.
If you use the traditional form submit, you need to save the parameters and rewrite the form input elements when you write the form the next time. But a better way is to use AJAX -- then the field data is sent without a form submission, and the input elements retain their data. See this link: http://www.w3schools.com/ajax/default.asp
After filling the form when submit, accidentally due to some filling error ,the form is not submit and return to back,in this condition the value of all text box is blank. i want to stable value of all fields in this condition . I'm using php with smarty framework. Please reply with solution as soon as possible.
Thanks.
If the form is submitted to the page that contains it then you will have access to the submitted values, and can use them to populate your form. For example, if you are submitting the form via POST:
<input name="something" value="<?=$_POST['something']?>" />
If you are submitting the form to a different script, you could send the values back to the page with the form as URL parameters, or you could use temporary session variables, and unset them when the input passes whatever validation you are using:
$_SESSION["temp_something"] = $_POST["something"]; //In form processing script
Then in your form:
<input name="something" value="<?=$_SESSION['temp_something']?>" /> <!--In form-->
You can fill the form fields, on the second round, by filling the content inside the value attributes of html tags, like so:
<input type="text" value="<?php echo $_REQUEST['test']; ?>" name="test">
Pay attention: this is a fast and simple solution. It gives you an idea. In good web programming practice you should sanitize the form data received by client in order to avoid security issues.
When you send a form through HTML, if you send a form to the original page, will the PHP variables defined previously keep their values?
No, every time you refresh the page the variables will change, unless you use session variables.
No. Script will run as new, all variables will be initiated again. If you want to keep some values - use session to store it.
No, any variables you to keep will have to be passed in the query string or form data. If you want to repopulate the form fields with the same data, you'll have to do that yourself as well, which may be as simple as doing this for each field:
<input type="text" name="city" value="<?= $_REQUEST['city'] ?>">
Unless you use those magic-defined variables (highly-unrecommended!!) that puts each form variable into a equally-named variable in php and you load that variable into the form, you will need to explicitly put all the variables into the form.
You can do that as follows:
<input type="text" value="<?php print($_POST['name']); ?>" name="name" />
Replace $_POST with $_GET according to your form method and the name with the name of the field!
is there a way to create custom post variables when a user presses submit, like this:
$_POST['var'] = 'hi';
In order to set post values on the page with the form you should use hidden input tags.
i.e.
<input type="hidden" name="var" value="hi" />
It will be invisible and your receiving script will see that key/value passed along.
Variables POSTed by the browser to your PHP script will only correspond to the fields of the form that was used in the browser -- which means you have to put your custom data in that form.
If you don't want them displayed, you can use a hidden input field :
<input type="hidden" name="var" value="hi" />
But note that the data will still be sent by the browser -- which means you have to escape/filter/protect it, like any other value that comes from the user ; and it cannot be trusted : anyone can pretty easily modify the value of that form field, even if it's not visible.
while $_POST variable is an array, you can also define var like this
$_POST['var'] = 'hi';
it is same like hidden field. :)