Podcast
Questions and Answers
What is the main purpose of declaring a variable as static within a function?
What is the main purpose of declaring a variable as static within a function?
- To make the variable accessible across different functions
- To maintain the variable's value between function calls (correct)
- To limit the variable's scope to the file
- To ensure the variable is destroyed after the function exits
What will be the output after calling incCount() for the third time?
What will be the output after calling incCount() for the third time?
- You have called this function 3 times
- You have called this function 5 times
- You have called this function 2 times
- You have called this function 4 times (correct)
What happens to the $counter variable within the BuggyResetCount function?
What happens to the $counter variable within the BuggyResetCount function?
- It retains its value from incCount function
- It overwrites the static $counter variable
- It is reinitialized to 1 and is independent of incCount (correct)
- It becomes static as well
How does the behavior of the static variable affect memory usage during the page load?
How does the behavior of the static variable affect memory usage during the page load?
What is the result of calling the BuggyResetCount function multiple times in relation to the $counter variable in incCount?
What is the result of calling the BuggyResetCount function multiple times in relation to the $counter variable in incCount?
What is the maximum length for logging errors specified in the php.ini file?
What is the maximum length for logging errors specified in the php.ini file?
In which directory can the php.ini file typically be found on a Windows system?
In which directory can the php.ini file typically be found on a Windows system?
Which keyword search format is recommended for finding the php.ini file?
Which keyword search format is recommended for finding the php.ini file?
What configuration value indicates that repeated errors will be shown in PHP?
What configuration value indicates that repeated errors will be shown in PHP?
What would be a plausible key:value pair found in php.ini based on the example given?
What would be a plausible key:value pair found in php.ini based on the example given?
What action should be taken after opening the php.ini file to submit your work?
What action should be taken after opening the php.ini file to submit your work?
What is required when demonstrating PHP code with XAMPP?
What is required when demonstrating PHP code with XAMPP?
Which suggestion may help if one cannot locate the php.ini file?
Which suggestion may help if one cannot locate the php.ini file?
What is the primary purpose of the PHP scope tag within HTML?
What is the primary purpose of the PHP scope tag within HTML?
Why is it recommended not to memorize PHP syntax?
Why is it recommended not to memorize PHP syntax?
Which of the following statements is true regarding the execution of PHP code?
Which of the following statements is true regarding the execution of PHP code?
What does the semicolon (;) signify in PHP code?
What does the semicolon (;) signify in PHP code?
Which HTML tag directly contains the PHP scope tag?
Which HTML tag directly contains the PHP scope tag?
What keyword is typically used in PHP to output text to the screen?
What keyword is typically used in PHP to output text to the screen?
Which of the following tools is mentioned as useful for running PHP code?
Which of the following tools is mentioned as useful for running PHP code?
What is regarded as a smarter approach to programming with PHP?
What is regarded as a smarter approach to programming with PHP?
What effect does defining a variable in a function scope have on its availability in the main execution?
What effect does defining a variable in a function scope have on its availability in the main execution?
Which statement correctly describes the concept of scope in programming?
Which statement correctly describes the concept of scope in programming?
If a variable is defined in both main execution and function scope, what will be the result when accessing the variable in the function?
If a variable is defined in both main execution and function scope, what will be the result when accessing the variable in the function?
What is the memory address implication when a variable is defined in both main execution and a function?
What is the memory address implication when a variable is defined in both main execution and a function?
Which of the following scenarios will cause an error related to variable scope?
Which of the following scenarios will cause an error related to variable scope?
What happens when you define two variables with the same name in different scopes?
What happens when you define two variables with the same name in different scopes?
Which statement accurately describes the relationship between function scope variables and global variables?
Which statement accurately describes the relationship between function scope variables and global variables?
In the provided code example, what is the value of $cost in the main execution scope?
In the provided code example, what is the value of $cost in the main execution scope?
What is the output of the expression echo 5 % 5;
?
What is the output of the expression echo 5 % 5;
?
Which statement correctly explains the use of the modulo operator in determining even numbers?
Which statement correctly explains the use of the modulo operator in determining even numbers?
What does the expression echo 2 ** 3;
evaluate to?
What does the expression echo 2 ** 3;
evaluate to?
In PHP, which of the following is the correct expansion of x += y
?
In PHP, which of the following is the correct expansion of x += y
?
Given the logical condition $sunny_today = true; $weekday = false;
, what will be the output of echo $sunny_today or $weekday;
?
Given the logical condition $sunny_today = true; $weekday = false;
, what will be the output of echo $sunny_today or $weekday;
?
What is the purpose of the assignment operator =
in PHP?
What is the purpose of the assignment operator =
in PHP?
Which condition accurately checks for a 'sunny weekend' based on the stated variables?
Which condition accurately checks for a 'sunny weekend' based on the stated variables?
What does x %= y
represent in PHP's syntax?
What does x %= y
represent in PHP's syntax?
When is it appropriate to use the GET method over the POST method?
When is it appropriate to use the GET method over the POST method?
What distinguishes superglobals from regular variables in PHP?
What distinguishes superglobals from regular variables in PHP?
What would happen if the GET method were used in registration.php for a password?
What would happen if the GET method were used in registration.php for a password?
Which superglobal variable can be used to access parameters sent through both GET and POST methods?
Which superglobal variable can be used to access parameters sent through both GET and POST methods?
What is the potential risk of displaying user inputs in the URL using the GET method?
What is the potential risk of displaying user inputs in the URL using the GET method?
In the context of form action and processing, what does the term 'action attribute' refer to?
In the context of form action and processing, what does the term 'action attribute' refer to?
Which of the following best explains the role of keys in superglobal arrays like $_POST?
Which of the following best explains the role of keys in superglobal arrays like $_POST?
Why is it generally not advisable to send passwords using the GET method?
Why is it generally not advisable to send passwords using the GET method?
Flashcards
PHP Scope Tag
PHP Scope Tag
A special tag within HTML that allows you to write PHP code, which the server interprets and executes.
PHP echo Command
PHP echo Command
A command used in PHP to print text to the screen.
Semicolon in PHP
Semicolon in PHP
A symbol that indicates the end of a statement in PHP code.
Web Server Role
Web Server Role
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PHP code execution
PHP code execution
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Embedding PHP code
Embedding PHP code
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Direct and Indirect Containment
Direct and Indirect Containment
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Creating a dynamic webpage
Creating a dynamic webpage
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php.ini File
php.ini File
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Key-Value Pairs
Key-Value Pairs
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Directives (php.ini)
Directives (php.ini)
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Log File Location
Log File Location
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XAMPP
XAMPP
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localhost
localhost
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PHP Code
PHP Code
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Dynamic Web Content
Dynamic Web Content
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Variable Scope
Variable Scope
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Main Execution
Main Execution
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Function Scope
Function Scope
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Variable Declaration
Variable Declaration
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Scope Isolation
Scope Isolation
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Error: Accessing a Variable in a Different Scope
Error: Accessing a Variable in a Different Scope
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Why is Variable Scope Important?
Why is Variable Scope Important?
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How are Variables Stored in Memory?
How are Variables Stored in Memory?
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GET Method
GET Method
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POST Method
POST Method
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Superglobals
Superglobals
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$_GET Superglobal
$_GET Superglobal
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$_POST Superglobal
$_POST Superglobal
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$_REQUEST Superglobal
$_REQUEST Superglobal
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Why not use GET for passwords?
Why not use GET for passwords?
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Why use GET for search filters?
Why use GET for search filters?
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Study Notes
PHP Building Blocks: Web Development Foundations
- PHP, CSS, and HTML are foundational web development languages.
- The image shows the interconnectedness of these programming languages.
Table of Contents
- The document contains a detailed table of contents for a PHP course.
- The table of contents lists the chapters and their corresponding page numbers. These page numbers are references to the document pages and are not sequential.
Additional Topics
- Client-Server Review: Discusses the client-server model, explaining why it's used, and how it works. Illustrates with computers A and B.
- Why use Client-Server: Explains the advantages of the client-server model, such as traffic congestion avoidance and constant website maintenance.
- HTTP: Defines the Hypertext Transfer Protocol (HTTP), explaining its role in web communication and request/response interaction in detail.
- Web Servers: Discusses local and remote server distinctions and how to access them (XAMPP and GBLearn)
- Setup Tools: Lists the tools required to learn PHP, including browser, IDE, text editor, and an FTP client. Also, a need for an account at GBLearn.com
- Port Numbers: Describes the need for port numbers with example formats for a browser URL.
- htdocs Folder: Explains the importance of the htdocs/dashboard folder for PHP files to operate on the server
- Documentation: Highlights the importance of online documentation for PHP information. This is vital for learning and troubleshooting.
- PHP Tags: Describes the use of opening and closing tags (
<?php
and?>
) for embedding PHP code into HTML and other documents. - Hello World: Presents a basic program showcasing PHP coding embedded with HTML.
- Mini Exercise 1: Describes a mini exercise to implement the
Hello World
application, including steps and testing on a local environment. - Mini Exercise 2: A mini exercise to locate and show particular key/value pairs in a PHP config file
- Maxi Exercise 1: Describes an exercise to display text and demonstrate live testing on a server
- Ch 1 Test Your Knowledge: A set of questions regarding the topics of the assigned chapter.
- Ch 1 Test Your Knowledge Solutions: Answers and explanations for the test-your-knowledge questions from the previous chapter.
- Ch 1 Quiz: A more detailed quiz, also related to topics within Chapter 1
- Ch 1 Quiz Solutions: Solutions and explanations to the quiz.
- Chapter 2 Terms: Defines key terms related to RAM and Drive memory and variables in programming, with examples.
- Variables: Explains variables in programming and their usage. Provides a RAM diagram.
- Identifiers/Naming Convention: Explains naming conventions (e.g., camelCase or PascalCase) for variables, functions, and classes. Explains the use of underscores and dollar signs ($)
- Constants: Defines constants and how to use them in PHP
- Data Types: Lists and defines different data types (e.g., strings, integers, floats, and booleans.)
- Mini Exercise 2 Solution: Solutions to the mini exercise in detailed answers in the format of question/answer
- Maxi Exercise 1: Instructions for executing an exercise that utilizes various concepts from the book.
- Chapter 1 Test Your Knowledge (Solutions): Solutions and explanations to Chapter 1's Test Your Knowledge questions.
- Chapter 1 Quiz (Solutions): Solutions and explanations to the quizzes in Chapter 1
- Chapter 2: Topics of RAM and Drives, Variables and their data types (more detail in the book)
- Chapter 3: Conditional statements -
if
/elseif
/else
andswitch
statements - Equality: Detailed explanation of the equality operator in PHP
- Logical Operators: Explanations of Logical Operators (AND, OR, XOR, and NOT)
- String Operators: The uses of string operators, such as the concatenation operator
- Mini Exercise 4: Provides instructions for a mini exercise relating to specific string manipulating functions.
- HTML Forms: Reviews HTML forms, explaining actions and methods (GET/POST).
- Superglobals: Explains superglobal variables, such as $_GET and $_POST
- MVC: Introduces the Model-View-Controller (MVC) pattern and how it helps in organizing PHP applications.
- Built-ins: Explains various built-in functions, primarily for arrays and their related operations.
- Queue vs Stack: Presents conceptual differences between Queue and Stack data structures
- Array Functions: Describes many array functions available in PHP, giving their descriptions.
- Test Your Knowledge (Solutions): Details the solutions to the different test your knowledge problems
- Chapter 5: Describes more built-in functions. Also includes topics about file I/O
- TXT/CSV/True CSV: Discusses various file types and how to read and write to different types of files
- File Functions: Explains file functions for opening, reading, writing, and closing.
- File Permissions: Describes how to use the
chmod
command to set file permissions on certain operating systems - Hashing: Explains why and how hashing is used.
- Race Conditions: Discusses the concept of race conditions and how they can be avoided
- Chapter 6: Topics related to files and related functions-open/close/write etc. Includes quiz and quiz solutions.
- Chapter 7: Discusses cookies and sessions, how they work and how to use them
- Chapter 8: Object Oriented Programming and related concepts.
- Objects VS Classes: Detailed comparative study of object-oriented programming
- Access Modifiers: Explains public, private, and protected methods/properties of a class, emphasizing how they control access.
- Method Return Type: Explains how to define the data type returned by a method.
- Define & Use Classes: Outlines steps, examples, and the meaning of defining a class.
- Properties and Methods: Defines properties as variables within classes and methods as functions performing actions in a class
- Constructor: Explains how a __construct function establishes and initializes the object and how this differs from standard function.
- Destructors: Discusses the __destruct part of an object
- Magic methods(_construct, _destruct, _toString, _clone): Explains the different magic methods that are called automatically. Demonstrates how to override these methods.
- Inheritance: Explain the "is-a" relationship between classes. Explains how the
parent::__construct()
function works (when extending a parent class) - Interfaces: Explains the use of interfaces, and when to use them -- emphasizing that these are contracts and cannot be instantiated
- Abstract: Explains abstract classes.
- Chapter 8 quizzes: Quiz questions and solutions related to OOP concepts.
- Chapter 9 terms: Discusses different SQL commands and concepts for database use (e.g., CREATE, INSERT, UPDATE, DELETE, etc.).
- Chapter 10: Override methods in PHP.
- Chapter 11: Error and Exception handling, including Try/Catch blocks. Provides practical examples and discussion of different types of exceptions.
- More terms, specific to these chapters, are included within each individual section.
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Description
Test your knowledge on PHP variable handling and configuration settings with this quiz. Questions cover static variables, error logging, and php.ini file locations. See how well you understand PHP's memory management and configuration best practices.