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<title>The MongoDB\BSON\Decimal128 class</title>
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<h1 class="title">The MongoDB\BSON\Decimal128 class</h1>
<div class="partintro"><p class="verinfo">(mongodb >=1.2.0)</p>
<div class="section" id="mongodb-bson-decimal128.intro">
<h2 class="title">Introduction</h2>
<p class="para">
BSON type for the
<a href="https://en.wikipedia.org/wiki/Decimal128_floating-point_format" class="link external">» Decimal128 floating-point format</a>,
which supports numbers with up to 34 decimal digits (i.e. significant
digits) and an exponent range of −6143 to +6144.
</p>
<p class="para">
Unlike the double BSON type (i.e. <span class="type"><a href="language.types.float.html" class="type float">float</a></span> in PHP), which only
stores an approximation of the decimal values, the decimal data type stores
the exact value. For example, <em>MongoDB\BSON\Decimal128('9.99')</em>
has a precise value of 9.99 where as a double 9.99 would have an approximate
value of 9.9900000000000002131628….
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
<strong class="classname">MongoDB\BSON\Decimal128</strong> is only compatible with
MongoDB 3.4+. Attempting to use the BSON type with an earlier version of
MongoDB will result in an error.
</span>
</p></blockquote>
</div>
<div class="section" id="mongodb-bson-decimal128.synopsis">
<h2 class="title">Class synopsis</h2>
<div class="classsynopsis">
<div class="ooclass"></div>
<div class="classsynopsisinfo">
<span class="modifier">final</span>
<span class="ooclass">
<strong class="classname">MongoDB\BSON\Decimal128</strong>
</span>
<span class="oointerface">implements
<span class="interfacename"><a href="class.mongodb-bson-decimal128interface.html" class="interfacename">MongoDB\BSON\Decimal128Interface</a></span>
</span>
<span class="oointerface">,
<span class="interfacename"><a href="class.mongodb-bson-type.html" class="interfacename">MongoDB\BSON\Type</a></span>
</span>
<span class="oointerface">,
<span class="interfacename"><a href="class.serializable.html" class="interfacename">Serializable</a></span>
</span>
<span class="oointerface">,
<span class="interfacename"><a href="class.jsonserializable.html" class="interfacename">JsonSerializable</a></span>
</span>
{</div>
<div class="classsynopsisinfo classsynopsisinfo_comment">/* Methods */</div>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="methodname"><a href="mongodb-bson-decimal128.construct.html" class="methodname">__construct</a></span>
([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$value</code></span>
] )</div>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="type">mixed</span> <span class="methodname"><a href="mongodb-bson-decimal128.jsonserialize.html" class="methodname">jsonSerialize</a></span>
( <span class="methodparam">void</span>
)</div>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="type">string</span> <span class="methodname"><a href="mongodb-bson-decimal128.serialize.html" class="methodname">serialize</a></span>
( <span class="methodparam">void</span>
)</div>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="type">string</span> <span class="methodname"><a href="mongodb-bson-decimal128.tostring.html" class="methodname">__toString</a></span>
( <span class="methodparam">void</span>
)</div>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="mongodb-bson-decimal128.unserialize.html" class="methodname">unserialize</a></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$serialized</code></span>
)</div>
}</div>
</div>
<div class="section">
<h2 class="title">Changelog</h2>
<p class="para">
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>1.2.0</td>
<td>
Implements <span class="interfacename"><a href="class.serializable.html" class="interfacename">Serializable</a></span> and
<span class="interfacename"><a href="class.jsonserializable.html" class="interfacename">JsonSerializable</a></span>.
</td>
</tr>
</tbody>
</table>
</p>
</div>
</div>
<h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="mongodb-bson-decimal128.construct.html">MongoDB\BSON\Decimal128::__construct</a> — Construct a new Decimal128</li><li><a href="mongodb-bson-decimal128.jsonserialize.html">MongoDB\BSON\Decimal128::jsonSerialize</a> — Returns a representation that can be converted to JSON</li><li><a href="mongodb-bson-decimal128.serialize.html">MongoDB\BSON\Decimal128::serialize</a> — Serialize a Decimal128</li><li><a href="mongodb-bson-decimal128.tostring.html">MongoDB\BSON\Decimal128::__toString</a> — Returns the string representation of this Decimal128</li><li><a href="mongodb-bson-decimal128.unserialize.html">MongoDB\BSON\Decimal128::unserialize</a> — Unserialize a Decimal128</li></ul>
</div>
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