PHP

'''PHP''' (PHP: Hypertext Preprocessor) is a reflective programming language originally designed for producing dynamic Web pages. PHP is used mainly in server-side application software, but can be used from a command line interface or in standalone graphical applications.

Citations

• Wikipedia:PHP

Tasks

• 100 doors
• 2048
• 24 game
• A+B
• ABC Problem
• Abstract type
• Accumulator factory
• Ackermann function
• Active Directory/Connect
• Active Directory/Search for a user
• Add a variable to a class instance at runtime
• Align columns
• Anagrams
• Anagrams/Deranged anagrams
• Anonymous recursion
• Apply a callback to an array
• Arbitrary-precision integers (included)
• Arithmetic-geometric mean
• Arithmetic/Integer
• Array concatenation
• Array length
• Arrays
• Assertions
• Associative array/Creation
• Associative array/Iteration
• Averages/Arithmetic mean
• Averages/Mean angle
• Averages/Mean time of day
• Averages/Median
• Averages/Mode
• Averages/Pythagorean means
• Averages/Root mean square
• Balanced brackets
• Base64 encode data
• Best shuffle
• Binary digits
• Binary search
• Bitcoin/address validation
• Bitmap
• Bitmap/Bézier curves/Cubic
• Bitmap/Histogram
• Bitmap/Write a PPM file
• Bitwise operations
• Boolean values
• Break OO privacy
• Bulls and cows
• CRC-32
• CSV data manipulation
• CSV to HTML translation
• Caesar cipher
• Call an object method
• Catalan numbers
• Character codes
• Check output device is a terminal
• Check that file exists
• Classes
• Closures/Value capture
• Collections
• Color of a screen pixel
• Colour bars/Display
• Combinations
• Combinations with repetitions
• Comma quibbling
• Command-line arguments
• Comments
• Compound data type
• Conditional structures
• Convert decimal number to rational
• Copy a string
• Count in octal
• Count occurrences of a substring
• Create a file
• Create an HTML table
• Cumulative standard deviation
• DNS query
• Date format
• Date manipulation
• Day of the week
• Delegates
• Delete a file
• Detect division by zero
• Determine if a string is numeric
• Dijkstra's algorithm
• Discordian date
• Documentation
• Dot product
• Dynamic variable names
• Echo server
• Empty directory
• Empty program
• Empty string
• Enforced immutability
• Enumerations
• Environment variables
• Equilibrium index
• Ethiopian multiplication
• Euler's sum of powers conjecture
• Evaluate binomial coefficients
• Even or odd
• Evolutionary algorithm
• Exceptions
• Execute Brainfuck
• Execute a system command
• Factorial
• Factors of a Mersenne number
• Factors of an integer
• Fast Fourier transform
• Fibonacci n-step number sequences
• Fibonacci sequence
• Filter
• Find common directory path
• Find limit of recursion
• Find the last Sunday of each month
• Find the missing permutation
• First-class functions
• FizzBuzz
• Flatten a list
• Flow-control structures
• Floyd's triangle
• Floyd-Warshall algorithm
• Forest fire
• Fork
• Formatted numeric output
• Forward difference
• Fractal tree
• Function composition
• Function definition
• Gaussian elimination
• Generate lower case ASCII alphabet
• Generator/Exponential
• Generic swap
• Gray code
• Grayscale image
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Guess the number
• Guess the number/With feedback
• HTTP
• HTTPS
• Hailstone sequence
• Handle a signal
• Happy numbers
• Hash from two arrays
• Hash join
• Haversine formula
• Hello world!
• Hello world/Graphical
• Hello world/Line printer
• Hello world/Newbie
• Hello world/Standard error
• Hello world/Text
• Hello world/Web server
• Here document
• Higher-order functions
• Horner's rule for polynomial evaluation
• Hostname
• Huffman coding
• IBAN
• Identity matrix
• Include a file
• Increment a numerical string
• Infinity
• Inheritance/Single
• Input loop
• Integer comparison
• Introspection
• Inverted index
• JSON
• Jensen's Device
• Josephus problem
• Kahan summation
• Kaprekar numbers
• Kernighans large earthquake problem
• Knapsack problem/0-1
• Knuth shuffle
• Knuth's algorithm S
• LZW compression
• Langton's ant
• Largest int from concatenated ints
• Last Friday of each month
• Leap year
• Least common multiple
• Letter frequency
• Levenshtein distance
• Linear congruential generator
• Literals/Floating point
• Literals/Integer
• Literals/String
• Logical operations
• Long multiplication
• Longest increasing subsequence
• Look-and-say sequence
• Loop over multiple arrays simultaneously
• Loops/Break
• Loops/Continue
• Loops/Do-while
• Loops/Downward for
• Loops/For
• Loops/For with a specified step
• Loops/Foreach
• Loops/Infinite
• Loops/N plus one half
• Loops/Nested
• Loops/While
• Luhn test of credit card numbers
• MD4
• MD5
• Magic 8-Ball
• Man or boy test
• Mandelbrot set
• Matrix transposition
• Maze generation
• Menu
• Middle three digits
• Miller–Rabin primality test
• Minesweeper game
• Modular exponentiation
• Modular inverse
• Modulinos
• Monte Carlo methods
• Monty Hall problem
• Munching squares
• Mutual recursion
• N-queens problem
• Named parameters
• Nested function
• Non-decimal radices/Convert
• Non-decimal radices/Input
• Non-decimal radices/Output
• Nth root
• Null object
• Number names
• Number reversal game
• Object serialization
• Odd word problem
• Old lady swallowed a fly
• OpenWebNet Password
• Operator precedence
• Palindrome detection
• Pangram checker
• Parametrized SQL statement
• Parsing/RPN calculator algorithm
• Pascal's triangle
• Perfect numbers
• Permutations with repetitions
• Phrase reversals
• Pick random element
• Pig the dice game
• Playing cards
• Pointers and references
• Polymorphic copy
• Polymorphism
• Population count
• Power set
• Primality by trial division
• Priority queue
• Program name
• Program termination
• Proper divisors
• Queue/Definition
• Queue/Usage
• Quine
• RPG Attributes Generator
• Ramer-Douglas-Peucker line simplification
• Random number generator (included)
• Random numbers
• Range expansion
• Read a file line by line
• Read entire file
• Real constants and functions
• Recaman's sequence
• Reduced row echelon form
• Reflection/List methods
• Reflection/List properties
• Regular expressions
• Remove duplicate elements
• Rename a file
• Repeat a string
• Respond to an unknown method call
• Return multiple values
• Reverse a string
• Reverse words in a string
• Rock-paper-scissors
• Roman numerals/Decode
• Roman numerals/Encode
• Rot-13
• Run-length encoding
• Runtime evaluation
• Runtime evaluation/In an environment
• SEDOLs
• SHA-1
• SHA-256
• SOAP
• SQL-based authentication
• Sattolo cycle
• Search a list
• Search a list of records
• Secure temporary file
• Self-describing numbers
• Semordnilap
• Send an unknown method call
• Send email
• Shell one-liner
• Show the epoch
• Sieve of Eratosthenes
• Singleton
• Sleep
• Sockets
• Sort an integer array
• Sort stability
• Sort three variables
• Sort using a custom comparator
• Sorting algorithms/Bead sort
• Sorting algorithms/Bogosort
• Sorting algorithms/Bubble sort
• Sorting algorithms/Cocktail sort
• Sorting algorithms/Comb sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Gnome sort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Patience sort
• Sorting algorithms/Permutation sort
• Sorting algorithms/Quicksort
• Sorting algorithms/Selection sort
• Sorting algorithms/Shell sort
• Sorting algorithms/Stooge sort
• Sorting algorithms/Strand sort
• Soundex
• Speech synthesis
• Stack
• Stack traces
• Straddling checkerboard
• String case
• String concatenation
• String interpolation (included)
• String length
• String matching
• Strip a set of characters from a string
• Strip block comments
• Strip whitespace from a string/Top and tail
• Substring
• Substring/Top and tail
• Sudoku
• Sum and product of an array
• Sum digits of an integer
• Sum of a series
• Sum of squares
• Sutherland-Hodgman polygon clipping
• Symmetric difference
• System time
• Take notes on the command line
• Temperature conversion
• Terminal control/Ringing the terminal bell
• Ternary logic
• Text between
• Text processing/2
• Text processing/Max licenses in use
• The Twelve Days of Christmas
• Tokenize a string
• Top rank per group
• Tree traversal
• Trigonometric functions
• URL decoding
• URL encoding
• Undefined values
• Unicode variable names
• Unix/ls
• Variables
• Variadic function
• Vector products
• Vigenère cipher
• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Web scraping
• Wireworld
• Word wrap
• Write entire file
• XML/DOM serialization
• XML/Input
• XML/XPath
• Y combinator
• Zeckendorf number representation
• Zero to the zero power
• Zig-zag matrix