Category:PHP

1

• 100 doors

2

• 24 game

9

• 99 Bottles of Beer

A

• A+B
• 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
• Arrays
• Assertions
• Associative array/Creation
• Associative array/Iteration
• Averages/Arithmetic mean
• Averages/Median
• Averages/Mode

B

• User:BenBE/Schulze method
• Best shuffle
• Binary digits
• Binary search
• Bitmap
• Bitmap/Bézier curves/Cubic
• Bitmap/Histogram
• Bitmap/Write a PPM file
• Bitwise operations
• Boolean values
• Break OO privacy
• Bulls and cows

C

• Caesar cipher
• Calendar - for "real" programmers
• Call an object method
• Catalan numbers
• Character codes
• Character matching
• Check that file exists
• Classes
• Closures/Value capture
• Collections
• Color of a screen pixel
• Colour bars/Display
• Combinations with repetitions
• Command-line arguments
• Comments
• Compound data type
• Conditional structures
• Copy a string
• Count in octal
• Count occurrences of a substring
• CRC-32
• Create a file
• Create an HTML table

D

• Date format
• Date manipulation
• Day of the week
• Deepcopy
• Delegates
• Delete a file
• Detect division by zero
• Determine if a string is numeric
• Dijkstra's algorithm
• Discordian date
• DNS query
• Documentation
• Dot product
• Dynamic variable names

E

• Echo server
• Empty directory
• Empty program
• Empty string
• Enforced immutability
• Enumerations
• Environment variables
• Equilibrium index
• Ethiopian multiplication
• Evaluate binomial coefficients
• Even or odd
• Exceptions
• Execute a system command
• Execute Brain****

F

• Factorial
• Factors of a Mersenne number
• Factors of an integer
• Fibonacci n-step number sequences
• Fibonacci sequence
• File IO
• File modification time
• File size
• Filter
• Find common directory path
• Find limit of recursion
• Find the missing permutation
• First-class functions
• FizzBuzz
• Flatten a list
• Flow-control structures

F cont.

• Fork
• Formatted numeric output
• Forward difference
• Fractal tree
• Function composition
• Function definition

G

• Generic swap
• Grayscale image
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Guess the number
• Guess the number/With feedback

H

• Hailstone sequence
• Handle a signal
• Happy numbers
• Hash from two arrays
• Haversine formula
• Hello world/Graphical
• Hello world/Line printer
• Hello world/Standard error
• Hello world/Text
• Hello world/Web server
• Here document
• Higher-order functions
• Horner's rule for polynomial evaluation
• Hostname
• HTTP
• HTTPS
• Huffman coding

I

• Identity matrix
• Include a file
• Increment a numerical string
• Infinity
• Inheritance/Single
• Input loop
• Integer comparison
• Introspection

J

• Jensen's Device
• JSON

K

• Kaprekar numbers
• Knapsack problem/0-1
• Knuth shuffle
• Knuth's algorithm S

L

• 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
• 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

M

• Man or boy test
• Mandelbrot set
• Matrix transposition
• MD5
• Menu
• Miller-Rabin primality test
• Minesweeper game
• Modular exponentiation
• Monte Carlo methods
• Monty Hall problem
• Munching squares
• Mutual recursion

N

• N-queens problem
• Non-decimal radices/Convert
• Non-decimal radices/Input
• Non-decimal radices/Output
• Nth root
• Null object
• Number names

O

• Object serialization
• Old lady swallowed a fly
• Operator precedence

P

• Palindrome detection
• Pangram checker
• Parametrized SQL statement
• Parsing/RPN calculator algorithm
• Pascal's triangle
• Perfect numbers
• Pick random element
• Pig the dice game
• Playing cards
• Pointers and references
• Polymorphic copy
• Polymorphism

P cont.

• Power set
• Primality by trial division
• Priority queue
• Program name
• Program termination

Q

• Queue/Definition
• Queue/Usage
• Quine

R

• Random number generator (included)
• Random numbers
• Range expansion
• Read a file line by line
• Read entire file
• Real constants and functions
• Reduced row echelon form
• Regular expressions
• Remove duplicate elements
• Rename a file
• Repeat a string
• Respond to an unknown method call
• Return multiple values
• Reverse a string
• Roman numerals/Decode
• Roman numerals/Encode
• Rot-13
• Run-length encoding
• Runtime evaluation
• Runtime evaluation/In an environment

S

• Scripted main
• Search a list
• Secure temporary file
• SEDOLs
• Semordnilap
• Send an unknown method call
• Send email
• SHA-1
• SHA-256
• Shell one-liner
• Show the epoch
• Sieve of Eratosthenes
• Singleton
• Sleep
• SOAP
• Sockets
• Sort an integer array
• Sort stability
• 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/Permutation sort
• Sorting algorithms/Quicksort
• Sorting algorithms/Selection sort
• Sorting algorithms/Shell sort
• Sorting algorithms/Stooge sort
• Sorting algorithms/Strand sort
• Soundex
• SQL-based authentication
• Stack
• Stack traces
• String case
• String concatenation
• String interpolation (included)
• String length
• Strip a set of characters from a string
• Strip whitespace from a string/Top and tail
• Substring
• Substring/Top and tail
• Sum and product of an array
• Sum digits of an integer
• Sum of a series
• Sum of squares
• Symmetric difference
• System time

T

• Table creation/Postal addresses
• Take notes on the command line
• Temperature conversion
• Text processing/2
• Text processing/Max licenses in use
• Tokenize a string
• Top rank per group
• Towers of Hanoi
• Trigonometric functions

U

• Undefined values
• Unicode variable names
• URL decoding
• URL encoding
• User input/Text

V

• Variables
• Variadic function

W

• Walk a directory/Non-recursively
• Walk a directory/Recursively
• Web scraping
• Wireworld

X

• XML/DOM serialization
• XML/Input
• XML/XPath

Y

• Y combinator

Z

• Zig-zag matrix