PHP Manual
Quickhash
The QuickHashIntHash class

The QuickHashIntHash class

(PECL quickhash >= Unknown)

Introduction

This class wraps around a hash containing integer numbers, where the values are also integer numbers. Hashes are also available as implementation of the ArrayAccess interface.

Hashes can also be iterated over with foreach as the Iterator interface is implemented as well. The order of which elements are returned in is not guaranteed.

Class synopsis

class QuickHashIntHash {

/* Constants */

const int CHECK_FOR_DUPES = 1;

const int DO_NOT_USE_ZEND_ALLOC = 2;

const int HASHER_NO_HASH = 256;

const int HASHER_JENKINS1 = 512;

const int HASHER_JENKINS2 = 1024;

/* Methods */

public add(int $key, int $value = ?): bool

public __construct(int $size, int $options = ?)

public delete(int $key): bool

public exists(int $key): bool

public get(int $key): int

public getSize(): int

public static loadFromFile(string $filename, int $options = ?): QuickHashIntHash

public static loadFromString(string $contents, int $options = ?): QuickHashIntHash

public saveToFile(string $filename): void

public saveToString(): string

public set(int $key, int $value): bool

public update(int $key, int $value): bool

}

Predefined Constants

QuickHashIntHash::CHECK_FOR_DUPES: If enabled, adding duplicate elements to a set (through either QuickHashIntHash::add() or QuickHashIntHash::loadFromFile()) will result in those elements to be dropped from the set. This will take up extra time, so only used when it is required.
QuickHashIntHash::DO_NOT_USE_ZEND_ALLOC: Disables the use of PHP's internal memory manager for internal set structures. With this option enabled, internal allocations will not count towards the memory_limit settings.
QuickHashIntHash::HASHER_NO_HASH: Selects to not use a hashing function, but merely use a modulo to find the bucket list index. This is not faster than normal hashing, and gives more collisions.
QuickHashIntHash::HASHER_JENKINS1: This is the default hashing function to turn the integer hashes into bucket list indexes.
QuickHashIntHash::HASHER_JENKINS2: Selects a variant hashing algorithm.

QuickHashIntHash::add — This method adds a new entry to the hash
QuickHashIntHash::__construct — Creates a new QuickHashIntHash object
QuickHashIntHash::delete — This method deletes an entry from the hash
QuickHashIntHash::exists — This method checks whether a key is part of the hash
QuickHashIntHash::get — This method retrieves a value from the hash by its key
QuickHashIntHash::getSize — Returns the number of elements in the hash
QuickHashIntHash::loadFromFile — This factory method creates a hash from a file
QuickHashIntHash::loadFromString — This factory method creates a hash from a string
QuickHashIntHash::saveToFile — This method stores an in-memory hash to disk
QuickHashIntHash::saveToString — This method returns a serialized version of the hash
QuickHashIntHash::set — This method updates an entry in the hash with a new value, or adds a new one if the entry doesn't exist
QuickHashIntHash::update — This method updates an entry in the hash with a new value