PHP Basics Quiz

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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

What symbol is used to declare a variable in PHP?

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

array() Signup and view all the answers

Match the following PHP variable characteristics with their descriptions:

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 Signup and view all the answers

What is the purpose of the global keyword in PHP?

To access a global variable from within a function Signup and view all the answers

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

False Signup and view all the answers

What are the two basic output statements used in PHP?

echo and print Signup and view all the answers

A variable declared within a function has a __________ scope.

local Signup and view all the answers

Match the following PHP terms with their definitions:

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 Signup and view all the answers

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

Character Signup and view all the answers

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

False Signup and view all the answers

What symbol is used to end statements in PHP?

; Signup and view all the answers

A PHP variable is case __________.

sensitive Signup and view all the answers

Match the PHP functions with their descriptions:

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 Signup and view all the answers

Which function is used to reverse a string in PHP?

strrev() Signup and view all the answers

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

False Signup and view all the answers

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

MySQL Signup and view all the answers

What does PHP stand for?

PHP: Hypertext Preprocessor Signup and view all the answers

PHP scripts run on the client side.

False Signup and view all the answers

What file extension is typically used for PHP files?

.php Signup and view all the answers

PHP can be used to _______ data in your database.

modify Signup and view all the answers

Which of the following features is NOT associated with PHP?

Real-time chat applications Signup and view all the answers

Match the following PHP functionalities with their descriptions:

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 Signup and view all the answers

PHP is free to download and use.

True Signup and view all the answers

List one advantage of using PHP.

Compatibility with various platforms Signup and view all the answers

What does the str_replace() function do in PHP?

Replaces characters in a string Signup and view all the answers

An integer in PHP can include a decimal point.

False Signup and view all the answers

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

0x Signup and view all the answers

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

multiple Signup and view all the answers

Which of the following is true about PHP Booleans?

They represent TRUE or FALSE. Signup and view all the answers

Match the PHP data types with their definitions:

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

What does the var_dump() function return for integers?

data type and value Signup and view all the answers

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

True Signup and view all the answers

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.

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Description

Test your knowledge on the fundamentals of PHP programming with this comprehensive quiz. Covering topics from variable declarations to functions and data types, this quiz is perfect for beginners looking to strengthen their understanding of PHP. Challenge yourself and see how well you know PHP's core concepts!

PHP Basics Quiz

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Podcast

Questions and Answers

What type of array in PHP uses named keys?

A variable in PHP must start with a number.

What symbol is used to declare a variable in PHP?

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

Match the following PHP variable characteristics with their descriptions:

What is the purpose of the global keyword in PHP?

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

What are the two basic output statements used in PHP?

A variable declared within a function has a __________ scope.

Match the following PHP terms with their definitions:

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

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

What symbol is used to end statements in PHP?

A PHP variable is case __________.

Match the PHP functions with their descriptions:

Which function is used to reverse a string in PHP?

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

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

What does PHP stand for?

PHP scripts run on the client side.

What file extension is typically used for PHP files?

PHP can be used to _______ data in your database.

Which of the following features is NOT associated with PHP?

Match the following PHP functionalities with their descriptions:

PHP is free to download and use.

List one advantage of using PHP.

What does the str_replace() function do in PHP?

An integer in PHP can include a decimal point.

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

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

Which of the following is true about PHP Booleans?

Match the PHP data types with their definitions:

What does the var_dump() function return for integers?

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

Study Notes

Introduction to PHP & Features

PHP Scripts

Data Types

Variables

Operators

Conditional Statements

Arrays

Loops

Functions

Working with Files

Working with Databases

Studying That Suits You

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