#Flexihash
Flexihash is a small PHP library which implements consistent hashing, which is most useful in distributed caching. It requires PHP5 and uses PHPUnit for unit testing.
##Installation
Composer is the recommended installation technique. You can find flexihash on Packagist so installation is as easy as
composer require flexihash/flexihash
or in your composer.json
{
"require": {
"flexihash/flexihash": "^2.0.0"
}
}##Usage
$hash = new Flexihash();
// bulk add
$hash->addTargets(array('cache-1', 'cache-2', 'cache-3'));
// simple lookup
$hash->lookup('object-a'); // "cache-1"
$hash->lookup('object-b'); // "cache-2"
// add and remove
$hash
->addTarget('cache-4')
->removeTarget('cache-1');
// lookup with next-best fallback (for redundant writes)
$hash->lookupList('object', 2); // ["cache-2", "cache-4"]
// remove cache-2, expect object to hash to cache-4
$hash->removeTarget('cache-2');
$hash->lookup('object'); // "cache-4"##Further Reading
React
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Django
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Microsoft
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Alibaba
D3
Tencent