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Make various corrections to notes

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Marcello 2021-07-12 16:18:53 +02:00
parent 411d740dd4
commit 23c1d6578f
16 changed files with 82 additions and 79 deletions
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17
PHP/Web.md
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@ -25,9 +25,9 @@ Handling of HTTP requests happend using the following global variables:
```html
<!-- method MUST BE post -->
<!-- must have enctype="multipart/form-data" attribute -->
<form name="invio_file" action="file.php" method="POST" enctype="multipart/form-data">
<form name="<name>" action="file.php" method="POST" enctype="multipart/form-data">
<input type="file" name="photo" />
<input type="submit" name="Invio" />
<input type="submit" name="Send" />
</form>
```
@ -36,13 +36,13 @@ Files in `$_FILES` are memorized in a system temp folder. They can be moved with
```php
if (! isset($_FILES['photo']['error'])) {
http_response_code(400); # send a response code
echo'<h1>Non è stato inviato nessun file</h1>';
echo'<h1>No file has been sent</h1>';
exit();
}
if ($_FILES['photo']['error'] != UPLOAD_ERR_OK) {
http_response_code(400);
echo'<h1>Il file inviato non è valido</h1>';
echo'<h1>The sent file is invalid</h1>';
exit();
}
@ -50,11 +50,11 @@ $path = '/path/to/' . $_FILES['photo']['name'];
if (! move_uploaded_file($_FILES['photo']['tmp_name'], $path)) {
http_response_code(400);
echo'<h1>Errore durante la scrittura del file</h1>';
echo'<h1>Error while writing the file</h1>';
exit();
}
echo'<h1>File inviato con successo</h1>';
echo'<h1>File succesfully sent</h1>';
```
### `$_SERVER`
@ -80,7 +80,7 @@ $_SERVER["HTTP_USER_AGENT"];
All sites **must** have a page for the consensus about using cookies.
**Cookies** are HTTP headers used to memorize key-value info *on the client*. They are sent from the server to the client to keep track of info on the user that is visting the website.
**Cookies** are HTTP headers used to memorize key-value info *on the client*. They are sent from the server to the client to keep track of info on the user that is visting the website.
When a client recieves a HTTP response that contains `Set-Cookie` headers it has to memorize that info and reuse them in future requests.
```http
@ -127,7 +127,8 @@ if(isset($_COOKIE["cookie_name"])) {}
PHP generates a cookie named `PHPSESSID` containing a *session identifier* and an *hash* generated from `IP + timestamp + pseudo-random number`.
To use the session it's necesary to recall the function `session_start()` at the beginning of a PHP script that deals with sesssions; after starting the session information in be savend in the `$_SESSION` array.
To use the session it's necesary to recall the function `session_start()` at the beginning of a PHP script that deals with sessions.
After starting the session information in be savend in the `$_SESSION` array.
```php
$_SESSION["key"] = value; // save data in session file (serialized data)