Q.1 (a) Describe the role of variables and constants in PHP. (b) How do you loop through an associative array in PHP? (c) Create a PHP script that takes a number as input and print... Q.1 (a) Describe the role of variables and constants in PHP. (b) How do you loop through an associative array in PHP? (c) Create a PHP script that takes a number as input and prints its multiplication table using loops. Q.2 (a) How do you loop through an associative array in PHP? (b) What is the difference between single-quoted and double-quoted strings in PHP? OR (b) Explain the concept of a recursive function with an example. (c) Explain the difference between cookies and sessions in PHP. OR (c) How do you capture data from an HTML form using PHP? Q.3 (a) What is the scope of a variable inside a function? (b) What is the purpose of a conditional structure in PHP? (c) Write a PHP script to connect to a MySQL database and create a new table. OR (b) List different types of loops in PHP. (c) Create a PHP script to display data from a MySQL table in an HTML table format. Q.4 (a) Define the purpose of the mysqli_connect() function.
Understand the Problem
The question set is asking for explanations, code creation, and details regarding PHP concepts, data structures, and database interactions related to PHP with Laravel. It covers topics like variables, loops, functions, and connecting to a MySQL database.
Answer
Variables can change; constants cannot. Use `foreach` for associative arrays. `mysqli_connect()` opens a MySQL connection.
1(a) Variables store data that can change, while constants hold static data. 1(b) Use foreach($array as $key => $value). 1(c) Accept input and use a for loop to print the table. 2(a) Use foreach. 2(b) Single quotes treat variables as plain text; double quotes parse them. 2(c) Cookies store data client-side; sessions store on the server. Capture form data using $_POST or $_GET. 3(a) A variable's scope in a function is local. 3(b) Conditional structures control the flow based on conditions. Connect to MySQL using mysqli_connect(). 4(a) mysqli_connect() opens a connection to a MySQL server.
Answer for screen readers
1(a) Variables store data that can change, while constants hold static data. 1(b) Use foreach($array as $key => $value). 1(c) Accept input and use a for loop to print the table. 2(a) Use foreach. 2(b) Single quotes treat variables as plain text; double quotes parse them. 2(c) Cookies store data client-side; sessions store on the server. Capture form data using $_POST or $_GET. 3(a) A variable's scope in a function is local. 3(b) Conditional structures control the flow based on conditions. Connect to MySQL using mysqli_connect(). 4(a) mysqli_connect() opens a connection to a MySQL server.
More Information
Using foreach for associative arrays is common for iterating through key-value pairs. For string handling, double quotes parse variables, while single quotes do not. Cookies and sessions manage user state differently, affecting data security and persistence.
Tips
When working with strings, remember that single quotes do not parse variables, leading to common mistakes. Also, handling cookies and sessions can be tricky if you're not aware of client-server data storage differences.
Sources
- PHP Associative Arrays - W3Schools - w3schools.com
- How to loop through an associative array and get the key in PHP? - geeksforgeeks.org
- PHP foreach Loop - W3Schools - w3schools.com
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