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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Cache - ReactPHP</title>
<meta name="description" content="Async, Promise-based cache interface for ReactPHP.">
<link rel="apple-touch-icon" sizes="180x180" href="https://reactphp.org/apple-touch-icon.png">
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<link rel="manifest" href="https://reactphp.org/manifest.json">
<link rel="mask-icon" href="https://reactphp.org/safari-pinned-tab.svg" color="#4f5b93">
<meta name="apple-mobile-web-app-title" content="ReactPHP">
<meta name="application-name" content="ReactPHP">
<meta name="theme-color" content="#f4f3f1">
<meta name="msapplication-config" content="https://reactphp.org/browserconfig.xml" />
<meta property="og:image" content="https://reactphp.org/og-image.png">
<link rel="preload" href="../assets/sourcesanspro-regular.f84b2bd4.woff" as="font" type="font/woff" crossorigin>
<link rel="preload" href="../assets/sourcesanspro-bold.cb7d3610.woff" as="font" type="font/woff" crossorigin>
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<h1>Cache</h1>
<div class="markdown-heading"><h1 class="heading-element">Cache</h1><a id="cache" class="anchor" aria-label="Permalink: Cache" href="#cache"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p><a href="https://github.com/reactphp/cache/actions"><img src="https://github.com/reactphp/cache/actions/workflows/ci.yml/badge.svg" alt="CI status" style="max-width: 100%;"></a>
<a href="https://packagist.org/packages/react/cache" rel="nofollow"><img src="https://camo.githubusercontent.com/c7f8bd9a3e6ae4ea8063f5c03d1dd93dd4523c90c31f6ed8e61e78efc0a7e2c9/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f72656163742f63616368653f636f6c6f723d626c7565266c6162656c3d696e7374616c6c732532306f6e2532305061636b6167697374" alt="installs on Packagist" data-canonical-src="https://img.shields.io/packagist/dt/react/cache?color=blue&label=installs%20on%20Packagist" style="max-width: 100%;"></a></p>
<p>Async, <a href="../promise/">Promise</a>-based cache interface
for <a href="https://reactphp.org/" rel="nofollow">ReactPHP</a>.</p>
<p>The cache component provides a
<a href="../promise/">Promise</a>-based
<a href="#cacheinterface"><code>CacheInterface</code></a> and an in-memory <a href="#arraycache"><code>ArrayCache</code></a>
implementation of that.
This allows consumers to type hint against the interface and third parties to
provide alternate implementations.
This project is heavily inspired by
<a href="https://www.php-fig.org/psr/psr-16/" rel="nofollow">PSR-16: Common Interface for Caching Libraries</a>,
but uses an interface more suited for async, non-blocking applications.</p>
<p><strong>Table of Contents</strong></p>
<ul>
<li>
<a href="#usage">Usage</a>
<ul>
<li>
<a href="#cacheinterface">CacheInterface</a>
<ul>
<li><a href="#get">get()</a></li>
<li><a href="#set">set()</a></li>
<li><a href="#delete">delete()</a></li>
<li><a href="#getmultiple">getMultiple()</a></li>
<li><a href="#setmultiple">setMultiple()</a></li>
<li><a href="#deletemultiple">deleteMultiple()</a></li>
<li><a href="#clear">clear()</a></li>
<li><a href="#has">has()</a></li>
</ul>
</li>
<li><a href="#arraycache">ArrayCache</a></li>
</ul>
</li>
<li>
<a href="#common-usage">Common usage</a>
<ul>
<li><a href="#fallback-get">Fallback get</a></li>
<li><a href="#fallback-get-and-set">Fallback-get-and-set</a></li>
</ul>
</li>
<li><a href="#install">Install</a></li>
<li><a href="#tests">Tests</a></li>
<li><a href="#license">License</a></li>
</ul>
<div class="markdown-heading"><h2 class="heading-element">Usage</h2><a id="usage" class="anchor" aria-label="Permalink: Usage" href="#usage"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<div class="markdown-heading"><h3 class="heading-element">CacheInterface</h3><a id="cacheinterface" class="anchor" aria-label="Permalink: CacheInterface" href="#cacheinterface"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>CacheInterface</code> describes the main interface of this component.
This allows consumers to type hint against the interface and third parties to
provide alternate implementations.</p>
<div class="markdown-heading"><h4 class="heading-element">get()</h4><a id="get" class="anchor" aria-label="Permalink: get()" href="#get"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>get(string $key, mixed $default = null): PromiseInterface<mixed></code> method can be used to
retrieve an item from the cache.</p>
<p>This method will resolve with the cached value on success or with the
given <code>$default</code> value when no item can be found or when an error occurs.
Similarly, an expired cache item (once the time-to-live is expired) is
considered a cache miss.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>
-><span class="pl-en">get</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>)
-><span class="pl-en">then</span>(<span class="pl-s">'<span class="pl-s">var_dump</span>'</span>);</pre></div>
<p>This example fetches the value of the key <code>foo</code> and passes it to the
<code>var_dump</code> function. You can use any of the composition provided by
<a href="../promise/">promises</a>.</p>
<div class="markdown-heading"><h4 class="heading-element">set()</h4><a id="set" class="anchor" aria-label="Permalink: set()" href="#set"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>set(string $key, mixed $value, ?float $ttl = null): PromiseInterface<bool></code> method can be used to
store an item in the cache.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when an error
occurs. If the cache implementation has to go over the network to store
it, it may take a while.</p>
<p>The optional <code>$ttl</code> parameter sets the maximum time-to-live in seconds
for this cache item. If this parameter is omitted (or <code>null</code>), the item
will stay in the cache for as long as the underlying implementation
supports. Trying to access an expired cache item results in a cache miss,
see also <a href="#get"><code>get()</code></a>.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>, <span class="pl-s">'<span class="pl-s">bar</span>'</span>, <span class="pl-c1">60</span>);</pre></div>
<p>This example eventually sets the value of the key <code>foo</code> to <code>bar</code>. If it
already exists, it is overridden.</p>
<p>This interface does not enforce any particular TTL resolution, so special
care may have to be taken if you rely on very high precision with
millisecond accuracy or below. Cache implementations SHOULD work on a
best effort basis and SHOULD provide at least second accuracy unless
otherwise noted. Many existing cache implementations are known to provide
microsecond or millisecond accuracy, but it's generally not recommended
to rely on this high precision.</p>
<p>This interface suggests that cache implementations SHOULD use a monotonic
time source if available. Given that a monotonic time source is only
available as of PHP 7.3 by default, cache implementations MAY fall back
to using wall-clock time.
While this does not affect many common use cases, this is an important
distinction for programs that rely on a high time precision or on systems
that are subject to discontinuous time adjustments (time jumps).
This means that if you store a cache item with a TTL of 30s and then
adjust your system time forward by 20s, the cache item SHOULD still
expire in 30s.</p>
<div class="markdown-heading"><h4 class="heading-element">delete()</h4><a id="delete" class="anchor" aria-label="Permalink: delete()" href="#delete"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>delete(string $key): PromiseInterface<bool></code> method can be used to
delete an item from the cache.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when an error
occurs. When no item for <code>$key</code> is found in the cache, it also resolves
to <code>true</code>. If the cache implementation has to go over the network to
delete it, it may take a while.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">delete</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>);</pre></div>
<p>This example eventually deletes the key <code>foo</code> from the cache. As with
<code>set()</code>, this may not happen instantly and a promise is returned to
provide guarantees whether or not the item has been removed from cache.</p>
<div class="markdown-heading"><h4 class="heading-element">getMultiple()</h4><a id="getmultiple" class="anchor" aria-label="Permalink: getMultiple()" href="#getmultiple"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>getMultiple(string[] $keys, mixed $default = null): PromiseInterface<array></code> method can be used to
retrieve multiple cache items by their unique keys.</p>
<p>This method will resolve with an array of cached values on success or with the
given <code>$default</code> value when an item can not be found or when an error occurs.
Similarly, an expired cache item (once the time-to-live is expired) is
considered a cache miss.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">getMultiple</span>(<span class="pl-en">array</span>(<span class="pl-s">'<span class="pl-s">name</span>'</span>, <span class="pl-s">'<span class="pl-s">age</span>'</span>))-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi">array</span> <span class="pl-s1"><span class="pl-c1">$</span>values</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>name</span> = <span class="pl-s1"><span class="pl-c1">$</span>values</span>[<span class="pl-s">'<span class="pl-s">name</span>'</span>] ?? <span class="pl-s">'<span class="pl-s">User</span>'</span>;
<span class="pl-s1"><span class="pl-c1">$</span>age</span> = <span class="pl-s1"><span class="pl-c1">$</span>values</span>[<span class="pl-s">'<span class="pl-s">age</span>'</span>] ?? <span class="pl-s">'<span class="pl-s">n/a</span>'</span>;
<span class="pl-k">echo</span> <span class="pl-s1"><span class="pl-c1">$</span>name</span> . <span class="pl-s">'<span class="pl-s"> is </span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>age</span> . <span class="pl-c1">PHP_EOL</span>;
});</pre></div>
<p>This example fetches the cache items for the <code>name</code> and <code>age</code> keys and
prints some example output. You can use any of the composition provided
by <a href="../promise/">promises</a>.</p>
<div class="markdown-heading"><h4 class="heading-element">setMultiple()</h4><a id="setmultiple" class="anchor" aria-label="Permalink: setMultiple()" href="#setmultiple"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>setMultiple(array $values, ?float $ttl = null): PromiseInterface<bool></code> method can be used to
persist a set of key => value pairs in the cache, with an optional TTL.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when an error
occurs. If the cache implementation has to go over the network to store
it, it may take a while.</p>
<p>The optional <code>$ttl</code> parameter sets the maximum time-to-live in seconds
for these cache items. If this parameter is omitted (or <code>null</code>), these items
will stay in the cache for as long as the underlying implementation
supports. Trying to access an expired cache items results in a cache miss,
see also <a href="#getmultiple"><code>getMultiple()</code></a>.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">setMultiple</span>(<span class="pl-en">array</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span> => <span class="pl-c1">1</span>, <span class="pl-s">'<span class="pl-s">bar</span>'</span> => <span class="pl-c1">2</span>), <span class="pl-c1">60</span>);</pre></div>
<p>This example eventually sets the list of values - the key <code>foo</code> to <code>1</code> value
and the key <code>bar</code> to <code>2</code>. If some of the keys already exist, they are overridden.</p>
<div class="markdown-heading"><h4 class="heading-element">deleteMultiple()</h4><a id="deletemultiple" class="anchor" aria-label="Permalink: deleteMultiple()" href="#deletemultiple"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>setMultiple(string[] $keys): PromiseInterface<bool></code> method can be used to
delete multiple cache items in a single operation.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when an error
occurs. When no items for <code>$keys</code> are found in the cache, it also resolves
to <code>true</code>. If the cache implementation has to go over the network to
delete it, it may take a while.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>->deleteMultiple(array(<span class="pl-s">'<span class="pl-s">foo</span>'</span>, <span class="pl-s">'<span class="pl-s">bar, </span>'</span>baz'));</pre></div>
<p>This example eventually deletes keys <code>foo</code>, <code>bar</code> and <code>baz</code> from the cache.
As with <code>setMultiple()</code>, this may not happen instantly and a promise is returned to
provide guarantees whether or not the item has been removed from cache.</p>
<div class="markdown-heading"><h4 class="heading-element">clear()</h4><a id="clear" class="anchor" aria-label="Permalink: clear()" href="#clear"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>clear(): PromiseInterface<bool></code> method can be used to
wipe clean the entire cache.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when an error
occurs. If the cache implementation has to go over the network to
delete it, it may take a while.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">clear</span>();</pre></div>
<p>This example eventually deletes all keys from the cache. As with <code>deleteMultiple()</code>,
this may not happen instantly and a promise is returned to provide guarantees
whether or not all the items have been removed from cache.</p>
<div class="markdown-heading"><h4 class="heading-element">has()</h4><a id="has" class="anchor" aria-label="Permalink: has()" href="#has"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>has(string $key): PromiseInterface<bool></code> method can be used to
determine whether an item is present in the cache.</p>
<p>This method will resolve with <code>true</code> on success or <code>false</code> when no item can be found
or when an error occurs. Similarly, an expired cache item (once the time-to-live
is expired) is considered a cache miss.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>
-><span class="pl-en">has</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>)
-><span class="pl-en">then</span>(<span class="pl-s">'<span class="pl-s">var_dump</span>'</span>);</pre></div>
<p>This example checks if the value of the key <code>foo</code> is set in the cache and passes
the result to the <code>var_dump</code> function. You can use any of the composition provided by
<a href="../promise/">promises</a>.</p>
<p>NOTE: It is recommended that has() is only to be used for cache warming type purposes
and not to be used within your live applications operations for get/set, as this method
is subject to a race condition where your has() will return true and immediately after,
another script can remove it making the state of your app out of date.</p>
<div class="markdown-heading"><h3 class="heading-element">ArrayCache</h3><a id="arraycache" class="anchor" aria-label="Permalink: ArrayCache" href="#arraycache"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>ArrayCache</code> provides an in-memory implementation of the <a href="#cacheinterface"><code>CacheInterface</code></a>.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span> = <span class="pl-k">new</span> <span class="pl-v">ArrayCache</span>();
<span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>, <span class="pl-s">'<span class="pl-s">bar</span>'</span>);</pre></div>
<p>Its constructor accepts an optional <code>?int $limit</code> parameter to limit the
maximum number of entries to store in the LRU cache. If you add more
entries to this instance, it will automatically take care of removing
the one that was least recently used (LRU).</p>
<p>For example, this snippet will overwrite the first value and only store
the last two entries:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span> = <span class="pl-k">new</span> <span class="pl-v">ArrayCache</span>(<span class="pl-c1">2</span>);
<span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>, <span class="pl-s">'<span class="pl-s">1</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">bar</span>'</span>, <span class="pl-s">'<span class="pl-s">2</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">baz</span>'</span>, <span class="pl-s">'<span class="pl-s">3</span>'</span>);</pre></div>
<p>This cache implementation is known to rely on wall-clock time to schedule
future cache expiration times when using any version before PHP 7.3,
because a monotonic time source is only available as of PHP 7.3 (<code>hrtime()</code>).
While this does not affect many common use cases, this is an important
distinction for programs that rely on a high time precision or on systems
that are subject to discontinuous time adjustments (time jumps).
This means that if you store a cache item with a TTL of 30s on PHP < 7.3
and then adjust your system time forward by 20s, the cache item may
expire in 10s. See also <a href="#set"><code>set()</code></a> for more details.</p>
<div class="markdown-heading"><h2 class="heading-element">Common usage</h2><a id="common-usage" class="anchor" aria-label="Permalink: Common usage" href="#common-usage"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<div class="markdown-heading"><h3 class="heading-element">Fallback get</h3><a id="fallback-get" class="anchor" aria-label="Permalink: Fallback get" href="#fallback-get"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>A common use case of caches is to attempt fetching a cached value and as a
fallback retrieve it from the original data source if not found. Here is an
example of that:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>
-><span class="pl-en">get</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>)
-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-s1"><span class="pl-c1">$</span>result</span>) {
<span class="pl-k">if</span> (<span class="pl-s1"><span class="pl-c1">$</span>result</span> === <span class="pl-c1">null</span>) {
<span class="pl-k">return</span> <span class="pl-en">getFooFromDb</span>();
}
<span class="pl-k">return</span> <span class="pl-s1"><span class="pl-c1">$</span>result</span>;
})
-><span class="pl-en">then</span>(<span class="pl-s">'<span class="pl-s">var_dump</span>'</span>);</pre></div>
<p>First an attempt is made to retrieve the value of <code>foo</code>. A callback function is
registered that will call <code>getFooFromDb</code> when the resulting value is null.
<code>getFooFromDb</code> is a function (can be any PHP callable) that will be called if the
key does not exist in the cache.</p>
<p><code>getFooFromDb</code> can handle the missing key by returning a promise for the
actual value from the database (or any other data source). As a result, this
chain will correctly fall back, and provide the value in both cases.</p>
<div class="markdown-heading"><h3 class="heading-element">Fallback get and set</h3><a id="fallback-get-and-set" class="anchor" aria-label="Permalink: Fallback get and set" href="#fallback-get-and-set"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>To expand on the fallback get example, often you want to set the value on the
cache after fetching it from the data source.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>cache</span>
-><span class="pl-en">get</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>)
-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-s1"><span class="pl-c1">$</span>result</span>) {
<span class="pl-k">if</span> (<span class="pl-s1"><span class="pl-c1">$</span>result</span> === <span class="pl-c1">null</span>) {
<span class="pl-k">return</span> <span class="pl-s1"><span class="pl-c1">$</span><span class="pl-smi">this</span></span>-><span class="pl-en">getAndCacheFooFromDb</span>();
}
<span class="pl-k">return</span> <span class="pl-s1"><span class="pl-c1">$</span>result</span>;
})
-><span class="pl-en">then</span>(<span class="pl-s">'<span class="pl-s">var_dump</span>'</span>);
<span class="pl-k">public</span> <span class="pl-k">function</span> <span class="pl-en">getAndCacheFooFromDb</span>()
{
<span class="pl-k">return</span> <span class="pl-s1"><span class="pl-c1">$</span><span class="pl-smi">this</span></span>-><span class="pl-c1">db</span>
-><span class="pl-en">get</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>)
-><span class="pl-en">then</span>(<span class="pl-en">array</span>(<span class="pl-s1"><span class="pl-c1">$</span><span class="pl-smi">this</span></span>, <span class="pl-s">'<span class="pl-s">cacheFooFromDb</span>'</span>));
}
<span class="pl-k">public</span> <span class="pl-k">function</span> <span class="pl-en">cacheFooFromDb</span>(<span class="pl-s1"><span class="pl-c1">$</span>foo</span>)
{
<span class="pl-s1"><span class="pl-c1">$</span><span class="pl-smi">this</span></span>-><span class="pl-c1">cache</span>-><span class="pl-en">set</span>(<span class="pl-s">'<span class="pl-s">foo</span>'</span>, <span class="pl-s1"><span class="pl-c1">$</span>foo</span>);
<span class="pl-k">return</span> <span class="pl-s1"><span class="pl-c1">$</span>foo</span>;
}</pre></div>
<p>By using chaining you can easily conditionally cache the value if it is
fetched from the database.</p>
<div class="markdown-heading"><h2 class="heading-element">Install</h2><a id="install" class="anchor" aria-label="Permalink: Install" href="#install"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The recommended way to install this library is <a href="https://getcomposer.org" rel="nofollow">through Composer</a>.
<a href="https://getcomposer.org/doc/00-intro.md" rel="nofollow">New to Composer?</a></p>
<p>This project follows <a href="https://semver.org/" rel="nofollow">SemVer</a>.
This will install the latest supported version:</p>
<div class="highlight highlight-source-shell"><pre>composer require react/cache:^1.2</pre></div>
<p>See also the <a href="changelog.html">CHANGELOG</a> for details about version upgrades.</p>
<p>This project aims to run on any platform and thus does not require any PHP
extensions and supports running on legacy PHP 5.3 through current PHP 8+ and
HHVM.
It's <em>highly recommended to use PHP 7+</em> for this project.</p>
<div class="markdown-heading"><h2 class="heading-element">Tests</h2><a id="tests" class="anchor" aria-label="Permalink: Tests" href="#tests"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>To run the test suite, you first need to clone this repo and then install all
dependencies <a href="https://getcomposer.org" rel="nofollow">through Composer</a>:</p>
<div class="highlight highlight-source-shell"><pre>composer install</pre></div>
<p>To run the test suite, go to the project root and run:</p>
<div class="highlight highlight-source-shell"><pre>vendor/bin/phpunit</pre></div>
<div class="markdown-heading"><h2 class="heading-element">License</h2><a id="license" class="anchor" aria-label="Permalink: License" href="#license"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>MIT, see <a href="license.html">LICENSE file</a>.</p>
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<a href="../cache/">Cache</a>
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v0.3.0
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v0.2.6
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<h3 class="component-info__subtitle">Installation</h3>
<div class="highlight highlight-source-shell"><pre>composer require react/cache:^1.2.0</pre></div>
<h3 class="component-info__subtitle">Contributors</h3>
<ul class="component-info__contributors">
<li>
<a href="https://github.com/clue">
<img src="https://avatars.githubusercontent.com/u/776829?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/776829?v=4&s=80 2x" alt="clue" title="clue (48 contributions)">
</a>
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<a href="https://github.com/WyriHaximus">
<img src="https://avatars.githubusercontent.com/u/147145?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/147145?v=4&s=80 2x" alt="WyriHaximus" title="WyriHaximus (38 contributions)">
</a>
</li>
<li>
<a href="https://github.com/cboden">
<img src="https://avatars.githubusercontent.com/u/617694?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/617694?v=4&s=80 2x" alt="cboden" title="cboden (13 contributions)">
</a>
</li>
<li>
<a href="https://github.com/SimonFrings">
<img src="https://avatars.githubusercontent.com/u/44357440?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/44357440?v=4&s=80 2x" alt="SimonFrings" title="SimonFrings (12 contributions)">
</a>
</li>
<li>
<a href="https://github.com/igorw">
<img src="https://avatars.githubusercontent.com/u/88061?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/88061?v=4&s=80 2x" alt="igorw" title="igorw (6 contribution)">
</a>
</li>
<li>
<a href="https://github.com/jsor">
<img src="https://avatars.githubusercontent.com/u/55574?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/55574?v=4&s=80 2x" alt="jsor" title="jsor (6 contribution)">
</a>
</li>
<li>
<a href="https://github.com/krlv">
<img src="https://avatars.githubusercontent.com/u/3404064?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/3404064?v=4&s=80 2x" alt="krlv" title="krlv (3 contribution)">
</a>
</li>
<li>
<a href="https://github.com/whatthejeff">
<img src="https://avatars.githubusercontent.com/u/306525?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/306525?v=4&s=80 2x" alt="whatthejeff" title="whatthejeff (1 contribution)">
</a>
</li>
<li>
<a href="https://github.com/nhedger">
<img src="https://avatars.githubusercontent.com/u/649677?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/649677?v=4&s=80 2x" alt="nhedger" title="nhedger (1 contribution)">
</a>
</li>
<li>
<a href="https://github.com/PaulRotmann">
<img src="https://avatars.githubusercontent.com/u/85174210?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/85174210?v=4&s=80 2x" alt="PaulRotmann" title="PaulRotmann (1 contribution)">
</a>
</li>
<li>
<a href="https://github.com/reedy">
<img src="https://avatars.githubusercontent.com/u/67615?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/67615?v=4&s=80 2x" alt="reedy" title="reedy (1 contribution)">
</a>
</li>
<li>
<a href="https://github.com/e3betht">
<img src="https://avatars.githubusercontent.com/u/1811561?v=4&s=40" srcset="https://avatars.githubusercontent.com/u/1811561?v=4&s=80 2x" alt="e3betht" title="e3betht (1 contribution)">
</a>
</li>
</ul>
<h3 class="component-info__subtitle">Activity</h3>
<div class="component-info__participation">
<svg width="320" height="42">
<defs>
<linearGradient id="reactphp-cache-participation-gradient" x1="0" x2="0" y1="1" y2="0">
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<stop offset="90%" stop-color="#ba3525"></stop>
</linearGradient>
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transform="translate(0, 40) scale(1,-1)"
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x="0"
y="-2"
width="320"
height="42"
style="stroke:none;fill:url(#reactphp-cache-participation-gradient);mask:url(#reactphp-cache-participation-sparkline)"
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