PHP Basics Quiz

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of array in PHP uses named keys?

  • Multidimensional arrays
  • Associative arrays (correct)
  • Scalar arrays
  • Indexed arrays

A variable in PHP must start with a number.

False (B)

What symbol is used to declare a variable in PHP?

$

An array in PHP can be created using the function ______.

<p>array()</p> Signup and view all the answers

Match the following PHP variable characteristics with their descriptions:

<p>No declaration command = Variables are created upon first value assignment Case-sensitive = Variable names are treated as different if their case differs Unique naming = No two variables can share the same name Underscore allowed = Variable names can start with an underscore character</p> Signup and view all the answers

What is the purpose of the global keyword in PHP?

<p>To access a global variable from within a function (A)</p> Signup and view all the answers

Static variables in PHP are deleted when a function execution is completed.

<p>False (B)</p> Signup and view all the answers

What are the two basic output statements used in PHP?

<p>echo and print</p> Signup and view all the answers

A variable declared within a function has a __________ scope.

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

Match the following PHP terms with their definitions:

<p>Local Scope = Can only be accessed within the function it is declared in Global Scope = Can be accessed outside the function it is declared in Static Variable = Retains its value between function calls Echo = Outputs data to the screen without a return value</p> Signup and view all the answers

Which of the following is NOT a data type supported by PHP?

<p>Character (D)</p> Signup and view all the answers

In PHP, comments are executed as part of the program.

<p>False (B)</p> Signup and view all the answers

What symbol is used to end statements in PHP?

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

A PHP variable is case __________.

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

Match the PHP functions with their descriptions:

<p>strlen() = Returns the length of a string str_word_count() = Counts the number of words in a string strrev() = Reverses a string strpos() = Searches for a specific text within a string</p> Signup and view all the answers

Which function is used to reverse a string in PHP?

<p>strrev() (C)</p> Signup and view all the answers

The PHP strlen() function counts the number of words in a string.

<p>False (B)</p> Signup and view all the answers

To install a database for PHP, you could use __________.

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

What does PHP stand for?

<p>PHP: Hypertext Preprocessor (C)</p> Signup and view all the answers

PHP scripts run on the client side.

<p>False (B)</p> Signup and view all the answers

What file extension is typically used for PHP files?

<p>.php</p> Signup and view all the answers

PHP can be used to _______ data in your database.

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

Which of the following features is NOT associated with PHP?

<p>Real-time chat applications (A)</p> Signup and view all the answers

Match the following PHP functionalities with their descriptions:

<p>Dynamic Page Content = Allows real-time data updates on a webpage File Manipulation = Create, open, read, write, and delete files Database Interaction = Add, modify, or delete data in databases Cookie Handling = Send and receive small pieces of data between server and client</p> Signup and view all the answers

PHP is free to download and use.

<p>True (A)</p> Signup and view all the answers

List one advantage of using PHP.

<p>Compatibility with various platforms</p> Signup and view all the answers

What does the str_replace() function do in PHP?

<p>Replaces characters in a string (D)</p> Signup and view all the answers

An integer in PHP can include a decimal point.

<p>False (B)</p> Signup and view all the answers

What character prefix is used to indicate a hexadecimal integer in PHP?

<p>0x</p> Signup and view all the answers

An array in PHP can hold ___ values under a single name.

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

Which of the following is true about PHP Booleans?

<p>They represent TRUE or FALSE. (C)</p> Signup and view all the answers

Match the PHP data types with their definitions:

<p>Integer = Non-decimal number Float = Number with decimal point Boolean = TRUE or FALSE value Array = Stores multiple values</p> Signup and view all the answers

What does the var_dump() function return for integers?

<p>data type and value</p> Signup and view all the answers

The output of the example showing an integer would display as 'int(5985)'.

<p>True (A)</p> Signup and view all the answers

Flashcards

PHP str_replace()

A function that replaces specific characters in a string with other characters.

PHP Integer

A whole number without decimal points. It can be positive, negative, or zero. It has a range of values from -2,147,483,648 to 2,147,483,647.

PHP Float

A number that can have decimal points or be in exponential form.

PHP Boolean

A data type that represents either TRUE or FALSE. It's often used for conditions and decision-making.

Signup and view all the flashcards

PHP Array

A special variable that holds multiple values under a single name. Each value is accessed using an index number.

Signup and view all the flashcards

PHP Script

A set of instructions written in the PHP programming language that a web server can execute.

Signup and view all the flashcards

PHP Syntax

The rules and structure that define how PHP code is written and interpreted by the server.

Signup and view all the flashcards

PHP Comments

Lines of text in a PHP script that are ignored by the server during execution. Used for explaining code and making it easier to understand.

Signup and view all the flashcards

PHP Variable

A container that stores data in a PHP script. Its value can change throughout the script execution.

Signup and view all the flashcards

PHP String

A sequence of characters used to represent text in PHP, enclosed in double quotes or single quotes.

Signup and view all the flashcards

PHP strlen() Function

A PHP function that calculates and returns the length of a string by counting the number of characters it contains.

Signup and view all the flashcards

PHP str_word_count() Function

A function that counts the number of words in a string, considering spaces as word separators.

Signup and view all the flashcards

PHP strrev() Function

A function that reverses the order of characters within a string.

Signup and view all the flashcards

What is PHP?

PHP stands for "PHP: Hypertext Preprocessor". It's a widely-used, open-source scripting language that runs on the server to generate dynamic web content.

Signup and view all the flashcards

What does a PHP file do?

A PHP file contains text, HTML, CSS, JavaScript, and PHP code. The PHP code is executed on the server and the result is sent back to the browser as plain HTML.

Signup and view all the flashcards

What can PHP do?

PHP can generate dynamic page content, work with files, collect form data, send/receive cookies, manage databases, control user access, encrypt data, and generate various output formats like images, PDFs, and Flash movies.

Signup and view all the flashcards

Why use PHP?

PHP runs on various platforms, compatible with most servers, supports many databases, is free and easy to learn, and runs efficiently on the server.

Signup and view all the flashcards

PHP file extension

PHP files have the extension ".php".

Signup and view all the flashcards

Server support for PHP

If your web server already supports PHP, you can simply create .php files and place them in your web directory. The server automatically parses and executes them.

Signup and view all the flashcards

Prerequisites for learning PHP

Before learning PHP, you should have a basic understanding of HTML, CSS, and JavaScript.

Signup and view all the flashcards

How to start using PHP

Find a web host with PHP and MySQL support, or install a web server on your own PC and then install PHP and MySQL.

Signup and view all the flashcards

Indexed Arrays

PHP arrays where elements are accessed using numerical indices, starting from 0.

Signup and view all the flashcards

Associative Arrays

PHP arrays that use descriptive keys (strings) instead of numbers to access their elements.

Signup and view all the flashcards

Multidimensional Arrays

PHP arrays that contain other arrays, allowing you to create hierarchical data structures.

Signup and view all the flashcards

Variable Scope

The region of a program where a variable is accessible. It determines which parts of the code can use the variable.

Signup and view all the flashcards

Local Scope

A variable's scope is limited to the function or code block where it's declared. Variables defined inside a function are only visible within that function.

Signup and view all the flashcards

Global Scope

A variable's scope spans the entire PHP program. Variables declared outside of any function are accessible from any part of the script.

Signup and view all the flashcards

The 'global' Keyword

This keyword lets you modify a global variable from inside a function. Use it before the global variable's name within the function to access it.

Signup and view all the flashcards

The 'static' Keyword

Keeps a local variable's value preserved between function calls. It prevents the variable from being deleted when the function ends.

Signup and view all the flashcards

Study Notes

Introduction to PHP & Features

  • PHP is a server-side scripting language, useful for creating dynamic and interactive web pages.
  • It's an alternative to Microsoft's ASP.
  • It's widely used, freely available, and efficient.

PHP Scripts

  • PHP code can be placed anywhere in an HTML document.
  • PHP code blocks begin with .

Data Types

  • PHP supports various data types for variables:
    • String: Sequence of characters, e.g., "Hello world!".
    • Integer: Whole numbers, e.g., 5, -10.
    • Float (Double): Floating-point numbers, e.g., 3.14, -2.5.
    • Boolean: True or False.
    • Array: Ordered collection of values.
    • Object: Complex data structures.
    • NULL: Represents the absence of a value.
    • Resource: Represents external resources.

Variables

  • Variables in PHP start with a dollar sign ($).
  • Variable names are case-sensitive.
  • Example: $name = "John Doe"; $age = 30;

Operators

  • PHP uses various operators for performing calculations and comparisons:
    • Arithmetic operators (+, -, *, /, %, **)
    • Assignment operators (=, +=, -=, *=, /=, %=)
    • Comparison operators (==, ===, !=, !==, >, <, >=, <=)
    • Logical operators (&&, ||, !)
    • String operators (., .=)

Conditional Statements

  • if statements: Execute code based on a condition.
  • if...else statements: Execute different code blocks based on whether a condition is true or false.
  • if...elseif...else statements: Execute different code blocks based on multiple conditions.
  • switch statements: Select one code block from multiple options based on a value.

Arrays

  • Indexed arrays: Elements are accessed by numerical index (starting at 0).
  • Associative arrays: Elements are accessed by named keys.
  • Multidimensional arrays: Arrays containing other arrays.

Loops

  • while loops: Repeat code blocks as long as a condition is true.
  • do...while loops: Execute code once, then repeat as long as a condition is true.
  • for loops: Repeat code blocks a specific number of times.
  • foreach loops: Iterate over each element in an array.

Functions

  • User-defined functions: Perform specific tasks, reusable code blocks.
  • Built-in functions: Perform common tasks, already available in PHP.

Working with Files

  • Functions for common file operations: open, read, write, close, etc.

Working with Databases

  • MySQL: Database system commonly used with PHP.
  • PDO (PHP Data Objects): Database access abstraction layer in PHP.
  • Database interactions (CRUD): Creating, Reading, Updating, and Deleting data.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

PHP Study Material PDF

More Like This

PHP Programming Fundamentals Quiz
20 questions

PHP Programming Fundamentals Quiz

TrustingPeridot avatar
TrustingPeridot
Programación Web
119 questions

Programación Web

BeautifulBongos avatar
BeautifulBongos
PHP Programming Basics
12 questions

PHP Programming Basics

LyricalComputerArt4498 avatar
LyricalComputerArt4498
PHP Variables Scope Quiz
10 questions

PHP Variables Scope Quiz

HelpfulLosAngeles avatar
HelpfulLosAngeles
Use Quizgecko on...
Browser
Open
Browser
Browser