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Web Development Lecture 9: PHP Loops and Functions

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Web Development Lecture 9: PHP Loops and Functions

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Questions and Answers

What is the purpose of the while loop in PHP?

To loop through a block of code for each element in an array

To execute a block of code as long as the specified condition is true (correct)

To execute a block of code a specified number of times

To skip a block of code if the specified condition is true

What is the syntax of the while loop in PHP?

while (condition); code to be executed;

while { condition; code to be executed; }

while condition { code to be executed; }

while (condition) { code to be executed; } (correct)

What is the difference between the while loop and the do...while loop in PHP?

The while loop loops through a block of code a specified number of times

The do...while loop loops through a block of code once, and then repeats the loop as long as the specified condition is true (correct)

The while loop executes a block of code once, and then repeats the loop as long as the specified condition is true

The do...while loop executes a block of code as long as the specified condition is true

How many types of loops are available in PHP?

<p>4</p> Signup and view all the answers

What is the purpose of the foreach loop in PHP?

<p>To loop through a block of code for each element in an array</p> Signup and view all the answers

Study Notes

PHP Loops

There are four types of loops in PHP: while, do...while, for, and foreach.
While loop: executes a block of code as long as a specified condition is true.
Syntax of while loop: while (condition) { code to be executed; }

The While Loop

Example: Set a variable i to 1, then the while loop will run as long as i is less than or equal to 5.
In each iteration, i will increase by 1.

PHP Functions and Arrays to be discussed later

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Description

This quiz covers PHP loops, functions, arrays, and super global variables, including while, do-while, for, and foreach loops.