How to do project with database with php and mysql?

To clarify your question, you have 3 tables as below for Teachers, Students and Requests. Most of us can't read Arabic, would you mind translating what you are looking for?  Google translates as

Dialing Required:
Photos for clarification:

In case the teacher has logged in, you will see the following page:



 Student ID If you click on any

Please leave a page with the following:


   ♥ Very conciliators

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Teacher
ID – primary key
name
password

Student
ID- primary key
Name
Email
Password
Age
Department
File
Phone number

Request
ID- primary key
Name
Email
Password
Age
Department
File
Phone number
Comment
Status

With questions like this, the best thing to do is break things into parts such as:
How do I create new tables in a database and assign a primary key?
How do I join tables?
How do I connect to a a mysql database using php?
How do I list all records in a table or query using mysql an dphp?
How do I show just one record using mysql and php?
How do I create a link in html?
How do I create a link in html generated from my database that links to a page to show just one record?

Just take one step at a time. But first, I think you need to give us more details of what you want and narrow the scope of this question even if it is, "Where do I begin?" or one of the questions above. Once you have one question answered move to the next. Splitting up like that will make it easier on you and the Experts.

How do I connect to a a mysql database using php?
How do I list all records in a table or query using mysql an dphp?
How do I show just one record using mysql and php?

You can use PDO or MySQLi

http://php.net/manual/en/pdo.connections.php

Assume you have a table called FOO with two fields, ID and Name

// Assume database is located on localhost and the name of the database is called test
$user = "myUserName";
$pass = "myPassword";
try {
    $dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass);
    foreach($dbh->query('SELECT ID, Name from FOO') as $row) {
                       $id = $row['ID'];
                       $name = $row['Name'];
         echo "<a href='detail.php?id=$id'>Click to go to detail for $name</a><br>";
    }
    $dbh = null;
} catch (PDOException $e) {
    print "Error!: " . $e->getMessage() . "<br/>";
    die();
}

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You html will looks like thing like

<a href="detail.php?id=1">Click to go to detail for thing1</a><br>
<a href="detail.php?id=2">Click to go to detail for thing2</a><br>
<a href="detail.php?id=3">Click to go to detail for thing3</a><br>

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Try and get that far and see how it goes.  If you have any issues, post back here.

If there is something similar to the online student and teacher and register if you know send me

I don't know of any outside of searching, "online course registration system project in php" which includes

https://github.com/gauravgaikwad777/Course-Registration-System-PHP-MySQL
https://github.com/iamtusharbhatia/Online-Course-Registration-System

You may want to look at those systems and get an idea of how to make your own.