🐘 PHP Technical Interview Programs

A collection of 20 essential PHP programs commonly asked in technical interviews — covering strings, arrays, loops, and basic OOP concepts.

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📚 Topics Covered

• String manipulation
• Array operations
• Mathematical logic
• File handling
• Object-Oriented Programming (OOP)
• Database connection basics

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🧠 List of Programs

No	Program Name	Description
1	reverse_string.php	Reverse a given string
2	palindrome_check.php	Check if a string is a palindrome
3	factorial.php	Calculate factorial of a number
4	prime_number.php	Check whether a number is prime
5	fibonacci_series.php	Print Fibonacci series up to n terms
6	sum_of_digits.php	Find sum of digits of a number
7	swap_numbers.php	Swap two numbers without using a third variable
8	armstrong_number.php	Check if a number is an Armstrong number
9	check_even_odd.php	Determine if a number is even or odd
10	find_largest_number.php	Find the largest among three numbers
11	array_sort.php	Sort an array in ascending order
12	array_reverse.php	Reverse elements in an array
13	count_vowels.php	Count vowels in a string
14	string_word_count.php	Count number of words in a string
15	remove_duplicates_array.php	Remove duplicates from an array
16	file_read_write.php	Demonstrate file read and write operations
17	simple_calculator.php	Perform basic calculator operations (+, -, *, /)
18	class_object_demo.php	Create a simple PHP class and object
19	inheritance_demo.php	Example of inheritance in PHP
20	database_connection.php	Basic MySQL database connection example

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⚙️ How to Run

1. Install PHP on your system (version 8+ recommended).
2. Clone this repository:

   git clone https://github.com/Abhinavsathyann/php-technical-interview-programs.git
   cd php-technical-interview-programs/programs

3. Run any program:

   php factorial.php