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Practice Zone • PHP
9 Topics 180 Questions All Difficulty
Topics
All Questions Full list for PHP 180 PHP Arrays Practice PHP Arrays with real questions. 20 PHP Control Flow Practice PHP Control Flow with real questions. 20 PHP Data Types Practice PHP Data Types with real questions. 20 PHP Error Handling Practice PHP Error Handling with real questions. 20 PHP Functions Practice PHP Functions with real questions. 20 PHP OOP Basics Practice PHP OOP Basics with real questions. 20 PHP Operators Practice PHP Operators with real questions. 20 PHP Strings Practice PHP Strings with real questions. 20 PHP Variables Practice PHP Variables with real questions. 20
Questions
Open List
Count Pairs with Sum <= X
Hard
Jan 25, 2026
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Queue Rotation
Hard
Jan 25, 2026
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Max Overlapping Intervals
Hard
Jan 25, 2026
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GCD Function
Easy
Jan 25, 2026
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Palindrome Function
Easy
Jan 25, 2026
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Count Vowels Function
Easy
Jan 25, 2026
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Rectangle Area Function
Easy
Jan 25, 2026
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Reverse String Function
Easy
Jan 25, 2026
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Recursive Factorial
Medium
Jan 25, 2026
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Fibonacci with Memo
Medium
Jan 25, 2026
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Sort Strings by Length
Medium
Jan 25, 2026
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Apply f(x)=2x+1 Twice
Medium
Jan 25, 2026
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Square Every Number
Medium
Jan 25, 2026
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Bracket Check Function
Medium
Jan 25, 2026
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Merge Two Sorted Arrays
Medium
Jan 25, 2026
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Binary Search Queries
Hard
Jan 25, 2026
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Evaluate Postfix Expression
Hard
Jan 25, 2026
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Closure Counter
Hard
Jan 25, 2026
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Compose Two Functions
Hard
Jan 25, 2026
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Generate Permutation by Swaps
Hard
Jan 25, 2026
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Group Words by First Letter
Hard
Jan 25, 2026
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Top K Frequent Numbers
Hard
Jan 25, 2026
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Merge Intervals (Function)
Hard
Jan 25, 2026
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Sum of Array
Easy
Jan 25, 2026
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Maximum Element
Easy
Jan 25, 2026
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Reverse the Array
Easy
Jan 25, 2026
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Count Occurrences
Easy
Jan 25, 2026
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Concatenate Two Arrays
Easy
Jan 25, 2026
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Remove Duplicates (Keep Order)
Medium
Jan 25, 2026
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Rotate Array Right
Medium
Jan 25, 2026
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Range Sum Queries
Medium
Jan 25, 2026
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Two Sum Indices
Medium
Jan 25, 2026
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Sort by Frequency
Medium
Jan 25, 2026
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Intersection (Unique Sorted)
Medium
Jan 25, 2026
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Missing Number 1..N
Medium
Jan 25, 2026
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Longest Subarray Sum = K
Hard
Jan 25, 2026
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Maximum Subarray Sum
Hard
Jan 25, 2026
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Count Inversions
Hard
Jan 25, 2026
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Sliding Window Maximum
Hard
Jan 25, 2026
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Minimum Swaps to Sort
Hard
Jan 25, 2026
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Kth Smallest (Quickselect)
Hard
Jan 25, 2026
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Split into 3 Equal Sum Parts
Hard
Jan 25, 2026
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Largest Rectangle in Histogram
Hard
Jan 25, 2026
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Reverse a String
Easy
Jan 25, 2026
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Count Vowels
Easy
Jan 25, 2026
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Title Case
Easy
Jan 25, 2026
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Palindrome Check
Easy
Jan 25, 2026
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Word Count
Easy
Jan 25, 2026
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Run-Length Encode
Medium
Jan 25, 2026
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First Non-Repeating Character
Medium
Jan 25, 2026
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Anagram Check
Medium
Jan 25, 2026
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Remove Duplicate Characters
Medium
Jan 25, 2026
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Longest Word
Medium
Jan 25, 2026
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Rotation Check
Medium
Jan 25, 2026
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Count Substring Occurrences
Medium
Jan 25, 2026
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Longest Common Prefix
Hard
Jan 25, 2026
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KMP Count Pattern
Hard
Jan 25, 2026
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Longest Substring Without Repeat
Hard
Jan 25, 2026
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Remove Adjacent Duplicates
Hard
Jan 25, 2026
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Longest Palindromic Substring Length
Hard
Jan 25, 2026
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Decode Bracket String
Hard
Jan 25, 2026
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Find All Anagram Starts
Hard
Jan 25, 2026
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Rearrange Without Adjacent Equals
Hard
Jan 25, 2026
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Safe Division
Easy
Jan 25, 2026
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Safe Array Index
Easy
Jan 25, 2026
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Strict Integer Input
Easy
Jan 25, 2026
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JSON Key Count
Easy
Jan 25, 2026
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Validate Date (YYYY-MM-DD)
Easy
Jan 25, 2026
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Average or EMPTY
Medium
Jan 25, 2026
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Stack Pop with Underflow
Medium
Jan 25, 2026
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Division List
Medium
Jan 25, 2026
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Safe Square Root
Medium
Jan 25, 2026
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Age Validator (Exception)
Medium
Jan 25, 2026
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Simplify Fraction with Checks
Medium
Jan 25, 2026
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Validate IPv4
Medium
Jan 25, 2026
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Parse 32-bit Integer
Hard
Jan 25, 2026
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Comma-Separated Integers
Hard
Jan 25, 2026
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Config Line Error Count
Hard
Jan 25, 2026
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Postfix with Error Handling
Hard
Jan 25, 2026
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JSON Required Keys
Hard
Jan 25, 2026
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Base Conversion with Validation
Hard
Jan 25, 2026
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Decode with Bracket Errors
Hard
Jan 25, 2026
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Rectangle Class
Easy
Jan 25, 2026
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Counter Object
Easy
Jan 25, 2026
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Bank Account
Easy
Jan 25, 2026
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Student Average
Easy
Jan 25, 2026
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Stack Class
Easy
Jan 25, 2026
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Queue Class
Medium
Jan 25, 2026
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Inventory Item
Medium
Jan 25, 2026
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Polymorphic Areas
Medium
Jan 25, 2026
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Temperature Converter Object
Medium
Jan 25, 2026
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Book Borrowing
Medium
Jan 25, 2026
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Word Counter Class
Medium
Jan 25, 2026
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LRU Cache Simulator
Hard
Jan 25, 2026
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Disjoint Set Union
Hard
Jan 25, 2026
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Expression Tree from Postfix
Hard
Jan 25, 2026
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Binary Search Tree Commands
Hard
Jan 25, 2026
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Undoable Text Editor
Hard
Jan 25, 2026
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Leaderboard Class
Hard
Jan 25, 2026
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Log Line Counter
Hard
Jan 25, 2026
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