PHP Basics.pdf

PHP files may contain HTML, CSS, and JavaScript.
1. PHP files are executed server-side.
2. The end user cannot see the PHP source code.
3. You cannot put PHP code in .html files.
4. You can put HTML, CSS, JavaScript code in .php files.
5. MySQL is an open source database server.
6. Each line in PHP must end with a semicolon.
7. You don't have to declare variables in PHP.
8.
1. PHP stands for Hypertext Preprocessor.
2. We use PHP for server-side scripting and dynamic website creation.
3. Examples of dynamic websites that use PHP include Facebook, Wikipedia, and WordPress.
4. Echo in PHP outputs text to the screen.
5. The function phpinfo() displays information about PHP installation.
6. `$variable = 10;` assigns a number to a variable.
7. Types of variables in PHP include integer, double, string, boolean, array, object, NULL.
8. Comments in PHP are inserted using `//` for single-line or `/ /` for multi-line comments.
9. The basic structure of an HTML page includes ``, ``, ``, `` sets the title of an HTML page.
17. PHP code to list the answers for the 3 times tables using a for loop: `for ($x = 1; $x <= 10; $x++) { echo "$x 3 = " . $x 3 . "
"; }`.
18. Statements to connect to a MySQL database and select the database: `$conn = mysqliconnect($servername, $username, $password); mysqliselect_db($conn, $dbname);`.
19. SQL query to display all records from the table "repair": `SELECT * FROM repair;`.