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<title>Calculate the sum of values in an array</title>
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</div><hr /><div id="function.array-sum" class="refentry">
<div class="refnamediv">
<h1 class="refname">array_sum</h1>
<p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">array_sum</span> — <span class="dc-title">Calculate the sum of values in an array</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.array-sum-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type"><a href="language.pseudo-types.html#language.types.number" class="type number">number</a></span> <span class="methodname"><strong>array_sum</strong></span>
( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>array_sum()</strong></span> returns the sum of values in an array.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.array-sum-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">array</code></em></span>
<dd>
<p class="para">
The input array.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.array-sum-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the sum of values as an integer or float.
</p>
</div>
<div class="refsect1 changelog" id="refsect1-function.array-sum-changelog">
<h3 class="title">Changelog</h3>
<p class="para">
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>4.2.1</td>
<td>
PHP versions prior to 4.2.1 modified the passed array itself and
converted strings to numbers (which most of the time converted them
to zero, depending on their value).
</td>
</tr>
</tbody>
</table>
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.array-sum-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4985">
<p><strong>Example #1 <span class="function"><strong>array_sum()</strong></span> examples</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$a </span><span style="color: #007700">= array(</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">, </span><span style="color: #0000BB">6</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"sum(a) = " </span><span style="color: #007700">. </span><span style="color: #0000BB">array_sum</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"a" </span><span style="color: #007700">=> </span><span style="color: #0000BB">1.2</span><span style="color: #007700">, </span><span style="color: #DD0000">"b" </span><span style="color: #007700">=> </span><span style="color: #0000BB">2.3</span><span style="color: #007700">, </span><span style="color: #DD0000">"c" </span><span style="color: #007700">=> </span><span style="color: #0000BB">3.4</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"sum(b) = " </span><span style="color: #007700">. </span><span style="color: #0000BB">array_sum</span><span style="color: #007700">(</span><span style="color: #0000BB">$b</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
sum(a) = 20
sum(b) = 6.9
</pre></div>
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</div>
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