PHP Learning Diary (1)---php Quick start

1.1 Submitting data through form form forms

Index.html

<form action= "test.php" method= "POST" >

<input type= "text" name= "username" value= "/>

<input type= "Submit" value= "Submission"/>

</form>

The form jumps to the test.php page, and the form data is passed through the post.

test.php

<?php

$username =$_post[' username '];

echo $username;

?>

$_post is a super global variable that is passed to the array of variables in the script via the Post method.

Other Super Global variables:

$GLBALS all global variable arrays

$_get An array of variables passed to the script by the GET method

$_cookie array of COOKIE variables

$_files array of variables related to file uploads

$_ENV environment variable Array

$_request array of variables for all user input

$_sessioin Session Variable Array

1.2 mutable variables

$a = "B";

$b = "zzz";

echo $ $a; Equivalent to $b

PHP Learning Diary (1)---php Quick start