PHP Arrays and User-Defined Functions Quiz

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Questions and Answers

Which function is used for array inspection in PHP?

var_dump (correct)
array_dump
array_inspect
print_r

What is the purpose of foreach loop in PHP?

To iterate through array elements (correct)
To declare arrays
To manipulate array elements
To define user-defined functions

What is an associative array in PHP?

An array with only numeric indexes
An array with no indexes
An array with both numeric and string indexes (correct)
An array with only string indexes

What is the purpose of static variables in PHP functions?

<p>To accumulate data across function calls (C)</p> Signup and view all the answers

Which keyword is used to declare a user-defined function in PHP?

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

Flashcards

What does the 'var_dump()' function do in PHP?

A PHP function that displays structured information about a variable, including its type and value.

What is the purpose of the 'foreach' loop in PHP?

The foreach loop is specifically designed to iterate through all elements of an array, providing access to each element's value and key (if applicable).

What is an associative array?

A type of array in PHP where each element is associated with a unique key, which can be a string or an integer.

What is the purpose of static variables in PHP functions?

Static variables allow a function to store data that persists between function calls. This means that the variable's value is retained even when the function finishes executing.

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How do you define a custom function in PHP?

The 'function' keyword is used to declare a user-defined function in PHP. This allows you to create reusable blocks of code that perform specific tasks.

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Study Notes

PHP Fundamentals

print_r() function is used for array inspection in PHP, allowing developers to print human-readable information about a variable.

Loops in PHP

foreach loop is used to iterate over arrays or objects, executing a block of code for each item in the collection.

Array Types in PHP

An associative array in PHP is a type of array that uses strings or integers as keys, allowing developers to store and retrieve data using named keys.

Variables in PHP

Static variables in PHP functions retain their value between function calls, allowing for persistent data storage within a function's scope.

Defining Functions in PHP

The function keyword is used to declare a user-defined function in PHP, enabling the creation of reusable blocks of code.

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Description

Test your knowledge of PHP arrays and user-defined functions with this quiz. Learn about the different approaches to using arrays in PHP, how to inspect arrays using functions like print_r and var_dump, and how to iterate through array elements using the foreach function. Explore one-dimensional and multi-dimensional arrays, as well as associative arrays.