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Questions and Answers
Match the following PHP data types with their descriptions:
String = A sequence of characters Integer = A whole number Float = A number with a decimal point Boolean = A true or false value
Match the following PHP variable types with their examples:
Array = $fruits = array('apple', 'banana', 'cherry'); Object = $car = new Car(); String = $name = 'John'; Integer = $age = 25;
Match the following PHP variable scope types with their characteristics:
Global = Accessible from anywhere in the script Local = Defined within a function Static = Preserves its value between function calls Parameter = Passed to a function on call
Match the following PHP variable naming conventions with their rules:
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Match the following PHP operators with their operations:
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Study Notes
PHP Data Types
- String: Represents a sequence of characters, enclosed in quotes.
- Integer: A non-decimal number, positive or negative, within a specific range.
- Float (Double): A number with decimal points used for precision.
- Boolean: Represents a binary value, either true or false.
- Array: A collection of values stored in a single variable, indexed by keys or numeric indices.
- Object: An instance of a class that can contain properties and methods.
PHP Variable Types Examples
-
String:
$name = "John"; -
Integer:
$age = 30; -
Float:
$price = 29.99; -
Boolean:
$isAvailable = true; -
Array:
$colors = array("red", "green", "blue"); -
Object:
$person = new Person();
PHP Variable Scope Types
- Local Scope: Variables declared within a function, accessible only inside that function.
- Global Scope: Variables declared outside any function, accessible from any part of the script.
-
Static Scope: Variables retain their value between function calls, declared with the keyword
static. - Parameter Scope: Variables passed to functions as arguments, limited to the function's context.
PHP Variable Naming Conventions
-
Case Sensitivity: Variable names are case-sensitive (
$varand$Varare different). - Starting Character: Must begin with a letter or underscore; cannot start with a number.
- Allowed Characters: Can contain letters, numbers, and underscores; no spaces or special characters.
-
Descriptive Names: Use clear, descriptive names for better readability, e.g.,
$totalCostinstead of$tc.
PHP Operators and Their Operations
- Arithmetic Operators: Used for basic math operations (addition, subtraction, multiplication, division).
-
Assignment Operators: Assign values to variables, e.g.,
=,+=,-=,*=. - Comparison Operators: Compare two values, returning boolean results (==, ===, !=, !==).
-
Logical Operators: Combine boolean values (
AND,OR,NOT). -
String Operators: Used to concatenate strings, represented by the dot
.operator.
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Description
Test your knowledge on PHP fundamentals by matching data types, variable types, variable scope, naming conventions, and operators with their respective descriptions and rules. This quiz covers essential concepts necessary for effective PHP programming.
