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<h1 class="refname">spl_object_hash</h1>
<p class="verinfo">(PHP 5 >= 5.2.0, PHP 7)</p><p class="refpurpose"><span class="refname">spl_object_hash</span> — <span class="dc-title">
Return hash id for given object
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.spl-object-hash-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>spl_object_hash</strong></span>
( <span class="methodparam"><span class="type">object</span> <code class="parameter">$obj</code></span>
)</div>
<p class="para rdfs-comment">
This function returns a unique identifier for the object. This id can be
used as a hash key for storing objects, or for identifying an object, as long
as the object is not destroyed. Once the object is destroyed, its hash may
be reused for other objects.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.spl-object-hash-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">object</code></dt>
<dd>
<p class="para">
Any object.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.spl-object-hash-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A string that is unique for each currently existing object and is always
the same for each object.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.spl-object-hash-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="regexiterator.setpregflags.example.basic">
<p><strong>Example #1 A <span class="function"><strong>spl_object_hash()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$id </span><span style="color: #007700">= </span><span style="color: #0000BB">spl_object_hash</span><span style="color: #007700">(</span><span style="color: #0000BB">$object</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$storage</span><span style="color: #007700">[</span><span style="color: #0000BB">$id</span><span style="color: #007700">] = </span><span style="color: #0000BB">$object</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.spl-object-hash-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
When an object is destroyed, its hash may be reused for other objects.
</p>
</p></blockquote>
</div>
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