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?>
<div id="function.mt-rand" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mt_rand</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">mt_rand</span> &mdash; <span class="dc-title">Generate a random value via the Mersenne Twister Random Number Generator</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.mt-rand-description">
  <h3 class="title">Опис</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>mt_rand</strong></span>(): <span class="type"><a href="language.types.integer.php" class="type int">int</a></span></div>

  <div class="methodsynopsis dc-description"><span class="methodname"><strong>mt_rand</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$min</code></span>, <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$max</code></span>): <span class="type"><a href="language.types.integer.php" class="type int">int</a></span></div>

  <p class="simpara">
   Many random number generators of older libcs
   have dubious or unknown characteristics and are slow.
   The <span class="function"><strong>mt_rand()</strong></span> function is a drop-in replacement
   for the older <span class="function"><a href="function.rand.php" class="function">rand()</a></span>. It uses a random
   number generator with known characteristics using the
   <a href="http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html" class="link external">&raquo;&nbsp;Mersenne Twister</a>, which
   will produce random numbers four times faster than what the average
   libc rand() provides.
  </p>
  <p class="simpara">
   If called without the optional <code class="parameter">min</code>,
   <code class="parameter">max</code> arguments <span class="function"><strong>mt_rand()</strong></span>
   returns a pseudo-random value between 0 and
   <span class="function"><a href="function.mt-getrandmax.php" class="function">mt_getrandmax()</a></span>.  If you want a random number
   between 5 and 15 (inclusive), for example, use <code class="literal">mt_rand(5,
   15)</code>.
  </p>
  <div class="caution"><strong class="caution">Застереження</strong>
 <p class="para">
  Ця функція не генерує криптографічно безпечні значення, тож <em>не
  повинна</em> використовуватись для криптографічних цілей чи тих, що
  вимагають використання непередбачуваних значень.
 </p>
 <p class="para">
  Якщо потрібна криптографічно безпечна випадковість, можна використати
  <span class="classname"><a href="class.random-randomizer.php" class="classname">Random\Randomizer</a></span> разом з рушієм
  <span class="classname"><a href="class.random-engine-secure.php" class="classname">Random\Engine\Secure</a></span>. Для простих випадків є функції
  <span class="function"><a href="function.random-int.php" class="function">random_int()</a></span> і <span class="function"><a href="function.random-bytes.php" class="function">random_bytes()</a></span>, які
  забезпечують зручний і безпечний <abbr title="Application Programming Interface">API</abbr> до системного
  <abbr title="Cryptographically Secure PseudoRandom Number Generator">CSPRNG</abbr>.
 </p>
</div>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.mt-rand-parameters">
  <h3 class="title">Параметри</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">min</code></dt>
     <dd>
      <p class="para">
       Optional lowest value to be returned (default: 0)
      </p>
     </dd>
    
    
     <dt><code class="parameter">max</code></dt>
     <dd>
      <p class="para">
       Optional highest value to be returned (default: <span class="function"><a href="function.mt-getrandmax.php" class="function">mt_getrandmax()</a></span>)
      </p>
     </dd>
    
   </dl>
  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.mt-rand-returnvalues">
  <h3 class="title">Значення, що повертаються</h3>
  <p class="para">
   A random integer value between <code class="parameter">min</code> (or 0)
   and <code class="parameter">max</code> (or <span class="function"><a href="function.mt-getrandmax.php" class="function">mt_getrandmax()</a></span>, inclusive).
  </p>
 </div>

 <div class="refsect1 errors" id="refsect1-function.mt-rand-errors">
  <h3 class="title">Помилки/виключення</h3>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     If <code class="parameter">max</code> is less than <code class="parameter">min</code>, a
     <span class="classname"><a href="class.valueerror.php" class="classname">ValueError</a></span> will be thrown.
    </span>
   </li>
  </ul>
 </div>

 <div class="refsect1 changelog" id="refsect1-function.mt-rand-changelog">
  <h3 class="title">Журнал змін</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>Версія</th>
       <th>Опис</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
      <td>8.0.0</td>
      <td>
       A <span class="classname"><a href="class.valueerror.php" class="classname">ValueError</a></span> will be thrown if <code class="parameter">max</code> is less than <code class="parameter">min</code>;
       previously an <strong><code><a href="errorfunc.constants.php#constant.e-warning">E_WARNING</a></code></strong> was raised, and the function returned <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong>.
      </td>
     </tr>

      <tr>
       <td>7.2.0</td>
       <td>
        <span class="function"><strong>mt_rand()</strong></span> <a href="migration72.incompatible.php#migration72.incompatible.rand-mt_rand-output" class="link">has received a bug fix</a> for a modulo bias bug. This means that sequences generated with a specific seed may differ from PHP 7.1 on 64-bit machines.
       </td>
      </tr>

      <tr>
       <td>7.1.0</td>
       <td>
        <span class="function"><a href="function.rand.php" class="function">rand()</a></span> <a href="migration71.incompatible.php#migration71.incompatible.rand-srand-aliases" class="link">has been made</a> an alias of <span class="function"><strong>mt_rand()</strong></span>.
       </td>
      </tr>

      <tr>
       <td>7.1.0</td>
       <td>
        <span class="function"><strong>mt_rand()</strong></span> <a href="migration71.incompatible.php#migration71.incompatible.fixes-to-mt_rand-algorithm" class="link">has been updated</a> to use the fixed, correct, version of
         the Mersenne Twister algorithm. To fall back to the old behaviour, use <span class="function"><a href="function.mt-srand.php" class="function">mt_srand()</a></span> with <strong><code><a href="random.constants.php#constant.mt-rand-php">MT_RAND_PHP</a></code></strong> as the second parameter.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.mt-rand-examples">
  <h3 class="title">Приклади</h3>
  <p class="para">
   <div class="example" id="example-1">
    <p><strong>Приклад #1 <span class="function"><strong>mt_rand()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">mt_rand</span><span style="color: #007700">(), </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">mt_rand</span><span style="color: #007700">(), </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br />echo </span><span style="color: #0000BB">mt_rand</span><span style="color: #007700">(</span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">15</span><span style="color: #007700">), </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

    <div class="example-contents"><p>Поданий вище приклад виведе щось
схоже на:</p></div>
    <div class="example-contents screen">
<div class="annotation-interactive examplescode"><pre class="examplescode">1604716014
1478613278
6</pre>
</div>
    </div>
   </div>
  </p>
 </div>

 <div class="refsect1 notes" id="refsect1-function.mt-rand-notes">
  <h3 class="title">Примітки</h3>
  <div class="warning"><strong class="warning">Увага</strong>
   <p class="para">
    <code class="parameter">min</code> <code class="parameter">max</code> range must
    be within the range <span class="function"><a href="function.mt-getrandmax.php" class="function">mt_getrandmax()</a></span>. i.e. (<code class="parameter">max</code> -
    <code class="parameter">min</code>) &lt;= <span class="function"><a href="function.mt-getrandmax.php" class="function">mt_getrandmax()</a></span>
    Otherwise, <span class="function"><strong>mt_rand()</strong></span> may return poorer random numbers
    than it should.
   </p>
  </div>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.mt-rand-seealso">
  <h3 class="title">Прогляньте також</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.mt-srand.php" class="function" rel="rdfs-seeAlso">mt_srand()</a> - Seeds the Mersenne Twister Random Number Generator</span></li>
    <li><span class="function"><a href="function.mt-getrandmax.php" class="function" rel="rdfs-seeAlso">mt_getrandmax()</a> - Show largest possible random value</span></li>
    <li><span class="function"><a href="function.random-int.php" class="function" rel="rdfs-seeAlso">random_int()</a> - Get a cryptographically secure, uniformly selected integer</span></li>
    <li><span class="function"><a href="function.random-bytes.php" class="function" rel="rdfs-seeAlso">random_bytes()</a> - Get cryptographically secure random bytes</span></li>
   </ul>
  </p>
 </div>

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