GET Requests in PHP
You already know that when submitting a form using the
GET method, form data appears in the browser's
address bar after the ? sign. This
data will be available in the PHP code in the array
$_GET.
In fact, having a form on the page is not mandatory - we can simply manually type a question mark in the address bar, list parameters with their values after it, and press enter.
In this case, the data we entered will also
be available in the array $_GET. That
is, it will be an imitation of form submission. Such
an imitation is called sending a GET
request. These words mean that we
should manually type a question mark
and request parameters into the address bar.
Request parameters are listed in the following
format: name, then an equals sign, then the parameter
value.
If there are several parameters, then
they are separated by an ampersand sign &.
Let's try with examples. Suppose you
have a certain PHP file. Access it
in the browser, as you usually do. And
then add ?par1=1 to the end of the address bar
and press enter.
As a result, our parameter will be contained
in $_GET['par1']:
<?php
echo $_GET['par1']; // will output '1'
?>
Now let's send not one parameter,
but two. To do this, add this to the end of the address
bar: ?par1=1&par2=2 and press
enter. Here is the result:
<?php
var_dump($_GET); // ['par1' => '1', 'par2' => '2']
?>
Send a number using a GET request.
Display it on the screen.
Send a number using a GET request.
Display the square of this number on the screen.
Send two numbers using a GET request.
Display the sum of these numbers on the screen.
Suppose a number is sent via a GET request.
Make it so that if the number 1 is passed, the word 'hello' is displayed,
and if 2, then the word 'bye'.
Given an array:
<?php
$arr = ['a', 'b', 'c', 'd', 'e'];
?>
Suppose a number can be passed via a GET request.
Make it so that the array element with the number passed in the request
is displayed on the screen.
