<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Pseudo-types and variables used in this documentation</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="language.types.callable.html">Callbacks</a></div>
<div class="next" style="text-align: right; float: right;"><a href="language.types.type-juggling.html">Type Juggling</a></div>
<div class="up"><a href="language.types.html">Types</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="language.pseudo-types" class="sect1">
<h2 class="title">Pseudo-types and variables used in this documentation</h2>
<div class="sect2" id="language.types.mixed">
<h3 class="title">mixed</h3>
<p class="para">
<em>mixed</em> indicates that a parameter may accept multiple (but
not necessarily all) types.
</p>
<p class="para">
<span class="function"><a href="function.gettype.html" class="function">gettype()</a></span> for example will accept all PHP types, while
<span class="function"><a href="function.str-replace.html" class="function">str_replace()</a></span> will accept <span class="type"><a href="language.types.string.html" class="type string">string</a></span>s and
<span class="type"><a href="language.types.array.html" class="type array">array</a></span>s.
</p>
</div>
<div class="sect2" id="language.types.number">
<h3 class="title">number</h3>
<p class="para">
<em>number</em> indicates that a parameter can be either
<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> or <span class="type"><a href="language.types.float.html" class="type float">float</a></span>.
</p>
</div>
<div class="sect2" id="language.types.callback">
<h3 class="title">callback</h3>
<p class="para">
<span class="type"><a href="language.pseudo-types.html#language.types.callback" class="type callback">callback</a></span> pseudo-types was used in this documentation before
<span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> type hint was introduced by PHP 5.4. It means exactly
the same.
</p>
</div>
<div class="sect2" id="language.types.void">
<h3 class="title">void</h3>
<p class="para">
<em>void</em> as a return type means that the return value is
useless. <em>void</em> in a parameter list means that the function
doesn't accept any parameters.
</p>
</div>
<div class="sect2" id="language.types.dotdotdot">
<h3 class="title">...</h3>
<p class="para">
<em><code class="parameter">$...</code></em> in function prototypes means
<em>and so on</em>. This variable name is used when a function can
take an endless number of arguments.
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="language.types.callable.html">Callbacks</a></div>
<div class="next" style="text-align: right; float: right;"><a href="language.types.type-juggling.html">Type Juggling</a></div>
<div class="up"><a href="language.types.html">Types</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
