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<title>Objects</title>
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</div><hr /><div id="language.types.object" class="sect1">
<h2 class="title">Objects</h2>
<div class="sect2" id="language.types.object.init">
<h3 class="title">Object Initialization</h3>
<p class="para">
To create a new <span class="type"><a href="language.types.object.html" class="type object">object</a></span>, use the <em>new</em> statement
to instantiate a class:
</p>
<div class="informalexample">
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">foo<br /></span><span style="color: #007700">{<br /> function </span><span style="color: #0000BB">do_foo</span><span style="color: #007700">()<br /> {<br /> echo </span><span style="color: #DD0000">"Doing foo."</span><span style="color: #007700">; <br /> }<br />}<br /><br /></span><span style="color: #0000BB">$bar </span><span style="color: #007700">= new </span><span style="color: #0000BB">foo</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$bar</span><span style="color: #007700">-></span><span style="color: #0000BB">do_foo</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<p class="simpara">
For a full discussion, see the
<a href="language.oop5.html" class="link">Classes and Objects</a> chapter.
</p>
</div>
<div class="sect2" id="language.types.object.casting">
<h3 class="title">Converting to object</h3>
<p class="para">
If an <span class="type"><a href="language.types.object.html" class="type object">object</a></span> is converted to an <span class="type"><a href="language.types.object.html" class="type object">object</a></span>, it is not
modified. If a value of any other type is converted to an
<span class="type"><a href="language.types.object.html" class="type object">object</a></span>, a new instance of the <em>stdClass</em>
built-in class is created. If the value was <strong><code>NULL</code></strong>, the new instance will be
empty. An <span class="type"><a href="language.types.array.html" class="type array">array</a></span> converts to an <span class="type"><a href="language.types.object.html" class="type object">object</a></span> with properties
named by keys and corresponding values. Note that in this case before PHP 7.2.0 numeric keys
have been inaccessible unless iterated.
</p>
<div class="informalexample">
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$obj </span><span style="color: #007700">= (object) array(</span><span style="color: #DD0000">'1' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'foo'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(isset(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">->{</span><span style="color: #DD0000">'1'</span><span style="color: #007700">})); </span><span style="color: #FF8000">// outputs 'bool(true)' as of PHP 7.2.0; 'bool(false)' previously<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">key</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">)); </span><span style="color: #FF8000">// outputs 'string(1) "1"' as of PHP 7.2.0; 'int(1)' previously<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<p class="para">
For any other value, a member variable named <em>scalar</em> will contain
the value.
</p>
<div class="informalexample">
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$obj </span><span style="color: #007700">= (object) </span><span style="color: #DD0000">'ciao'</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">$obj</span><span style="color: #007700">-></span><span style="color: #0000BB">scalar</span><span style="color: #007700">; </span><span style="color: #FF8000">// outputs 'ciao'<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
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