Function in php to get user input

PHP provides a variety of functions for obtaining user input: 1. $_GET: Get data from the URL query string; 2. $_POST: Get data from the HTTP request body; 3. $_REQUEST: Combine $_GET and $_POST, handles various HTTP requests; 4. readfile(): Read data from the file; 5. stream_get_contents(): Get data from the file pointer or URL; 6. fgets() / freadline(): Read from the file pointer Get a row of data; 7. parse_str(): parse the query string.

PHP functions to obtain user input

PHP provides a variety of functions to obtain user input, mainly including the following Several types:

1. $_GET

Gets data from the query string of the URL for GET requests. For example:

<code class="php"><?php
$name = $_GET["name"];
?></code>

2. $_POST

Gets data from the HTTP request body for POST requests. For example:

<code class="php"><?php
$email = $_POST["email"];
?></code>

3. $_REQUEST

merges $_GET and $_POST and can be used to handle various HTTP requests. For example:

<code class="php"><?php
$username = $_REQUEST["username"];
?></code>

4. readfile()

Read data from the file. For example:

<code class="php"><?php
$data = readfile("input.txt");
?></code>

5. stream_get_contents()

Get data from file pointer or URL. For example:

<code class="php"><?php
$handle = fopen("input.txt", "r");
$data = stream_get_contents($handle);
?></code>

6. fgets() / freadline()

Read a line of data from the file pointer. For example:

<code class="php"><?php
$handle = fopen("input.txt", "r");
$line = fgets($handle);
?></code>

7. parse_str()

Parse the query string into an array of key-value pairs. For example:

<code class="php"><?php
$data = "name=John&email=john@example.com";
parse_str($data, $params);
?></code>

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