Beginners PHP Question: What the difference between $_POST and $_FILES?
PHP.net says:
$_POST is an associative array of variables passed to the current script via the HTTP POST method
$_FILES is an associative array of items uploaded to the current script via the HTTP POST method
Could anyone explain what this means in practical terms?
Both $_POST and $_FILES are so called in php "superglobals". They are predefined variables(arrays), which means they are available in all scopes throughout a script. There is no need to declare them to access them within functions or methods.
$_POST contains all the data from forms (except files)
$_FILES contains all files sent to server via forms (only from <input type="file" />)
$_POST and $_FILES are called 'superglobals'.
$_POST contains the data from the form without displaying it in the url address. So it's safe in posting data.
But for files you have to use $_FILES, because files can not be posted using $_POST.
Hope it will work for you.
Both $_POST and $_FILES are so called in php "superglobals".
They are predefined variables(arrays), which means they are available in all scopes throughout a script.
There is no need to declare them to access them within functions or methods.
$_POST contains all the data from forms (except files)
$_FILES contains all files sent to server via forms
(only from )
Related
The variables in $_REQUEST are provided to the script via the GET, POST, and COOKIE input mechanisms.
Is there a way in code igniter to access GET and POST both data through one predefined variable or function
You can use
$this->input->post_get('some_data', TRUE);
This will work like $_REQUEST.More function are there like cookie,server.
For more information check here
I am bit confused about these super global variable ($_POST, $_GET, and $_REQUEST) in PHP. In which scenario do I need to use these variables in PHP, and what are the main differences these three stand for?
$_POST is an associative array of variables passed to the current script via the HTTP POST method when using application/x-www-form-urlencoded or multipart/form-data as the HTTP Content-Type in the request.
You can use when you are sending large data to server or if you have sensitive information like passwords, credit card details etc
$_GET is an associative array of variables passed to the current script via the URL parameters. you can use when there is small amount of data, it is mostly used in pagination, page number is shown in the url and you can easily get the page number from URL using $_GET
$_REQUEST is a 'superglobal' or automatic global, variable. This simply means that it is available in all scopes throughout a script. It is an associative array that by default contains the contents of $_GET, $_POST and $_REQUEST (depending on request_order=)
Difference is:
$_GET retrieves variables from the querystring, or your URL.>
$_POST retrieves variables from a POST method, such as (generally) forms.
$_REQUEST is a merging of $_GET and $_POST where $_POST overrides $_GET.
There are 2 methods to send HTML form data from 1 Page to another or HTML page to server side (In PHP).
POST
It is a method in which data gets sent using packet which is not visible to any user on web-browser. it is secured compared to GET method.
GET
It is a method in which data gets sent with URL which is visible to user in address-bar of any web-browser. So, it’s not secure as POST method.
Now, There are total three super global variables to catch this data in PHP.
$_POST: It can catch the data which is sent using POST method.
$_GET: It can catch the data which is sent using GET method.
$_REQUEST: It can catch the data which is sent using both POST & GET methods.
Also with $_GET superglobal variable can collect data sent in the URL from submit button.
Well, to know better, please visit GET vs. POST:
1) Both $_GET and $_POST create an array e.g. array( key => value, key2 => value2, key3 => value3, ...). This array holds key/value pairs, where keys are the names of the form controls and values are the input data from the user.
2) Both GET and POST are treated as $_GET and $_POST. These are superglobals, which means that they are always accessible, regardless of scope - and you can access them from any function, class or file without having to do anything special.
3) $_GET is an array of variables passed to the current script via the URL parameters.
4) $_POST is an array of variables passed to the current script via the HTTP POST method.
---- whereas $_REQUEST contains $_POST, $_GET and $_COOKIE .
For my RESTFUL API server I'm trying to use the "PUT" method for uploading a file.
Actions started as reading php://input.
So, how can pass file name or some other parameters to action and display them?
You can use post method therefore, you can collect data from form-data using $_POST the super global variable because, there is no super global like $_PUT for put method.
I call my php file in the browser with "...test.php?text=Hello" but the $_POST variable stays empty (also print_r($_POST) returns array() ).
Why? Do I need to activate the post variable or something?
Thanks.
Variables passed in through the URL end up inside $_GET, not $_POST.
$_POST contains variables parsed by reading the HTTP request body when the method is POST. In this case the method is not POST and there is also no request body.
If you pass the variable through the URL you use $_GET.
Also, you will access the variable with:
$_GET['text']
This is a array that is sent through and you need to specify what item in the array you want to use.
...test.php?text=hello passes data via the GET method (accessible via $_GET in the processing script).
$_POST gets populated by forms or cURL access (when the transfer method is defined as "post")
Does anyone have experience with this
I wanted to use $_files in my class
like
$Uploadfile= $_FILES['file'];
but then the script errors
I thought superglobals were acccessible anywhere
thanks, Richard
Yes, $_FILES is a superglobal, which means that it's accessible from every scope. It's only set if the request actually contains a multipart/form-data body.