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POShare variables between functions in PHP without using globals
 

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    <p>I have a class for interacting with a memcache server. I have different functions for inserting, deleting and retrieving data. Originally each function made a call to <code>memcache_connect()</code>, however that was unnecessary, e.g.:</p> <pre><code>mc-&gt;insert() mc-&gt;get() mc-&gt;delete() </code></pre> <p>would make three memcache connections. I worked around this by creating a construct for the class:</p> <pre><code>function __construct() { $this-&gt;mem = memcache_connect( ... ); } </code></pre> <p>and then using <code>$this-&gt;mem</code> wherever the resource was needed, so each of the three functions use the same <code>memcache_connect</code> resource.</p> <p>This is alright, however if I call the class inside other classes, e.g.:</p> <pre><code>class abc { function __construct() { $this-&gt;mc = new cache_class; } } class def { function __construct() { $this-&gt;mc = new cache_class; } } </code></pre> <p>then it is still making two <code>memcache_connect</code> calls, when it only <em>needs</em> one.</p> <p>I can do this with globals but I would prefer not to use them if I don't have to.</p> <p>Example globals implementation:</p> <pre><code>$resource = memcache_connect( ... ); class cache_class { function insert() { global $resource; memcache_set( $resource , ... ); } function get() { global $resource; return memcache_get( $resource , ... ); } } </code></pre> <p>Then no matter how many times the class is called there will only be one call to <code>memcache_connect</code>.</p> <p>Is there a way to do this or should I just use globals?</p>
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