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<h1 class="refname">gmp_random</h1>
<p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">gmp_random</span> — <span class="dc-title">Random number</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.gmp-random-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">resource</span> <span class="methodname"><strong>gmp_random</strong></span>
([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$limiter</code><span class="initializer"> = 20</span></span>
] )</div>
<p class="para rdfs-comment">
Generate a random number. The number will be between
zero and the number of bits per limb multiplied by
<em><code class="parameter">limiter</code></em>. If <em><code class="parameter">limiter</code></em>
is negative, negative numbers are generated.
</p>
<p class="para">
A limb is an internal GMP mechanism. The number of bits in a limb is
not static, and can vary from system to system. Generally, the number
of bits in a limb is either 16 or 32, but this is not guaranteed.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.gmp-random-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">limiter</code></em></span>
<dd>
<p class="para">
The limiter.
</p>
<p class="para">It can be either a GMP number <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>, or a
numeric string given that it is possible to convert the latter to a number.</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.gmp-random-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A random GMP number.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.gmp-random-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3428">
<p><strong>Example #1 <span class="function"><strong>gmp_random()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$rand1 </span><span style="color: #007700">= </span><span style="color: #0000BB">gmp_random</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">); </span><span style="color: #FF8000">// random number from 0 to 1 * bits per limb<br /></span><span style="color: #0000BB">$rand2 </span><span style="color: #007700">= </span><span style="color: #0000BB">gmp_random</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">); </span><span style="color: #FF8000">// random number from 0 to 2 * bits per limb<br /><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">gmp_strval</span><span style="color: #007700">(</span><span style="color: #0000BB">$rand1</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">gmp_strval</span><span style="color: #007700">(</span><span style="color: #0000BB">$rand2</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>
1915834968
8642564075890328087
</pre></div>
</div>
</div>
</p>
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