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<title>Get the boolean value of a variable</title>
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</div><hr /><div id="function.boolval" class="refentry">
<div class="refnamediv">
<h1 class="refname">boolval</h1>
<p class="verinfo">(PHP 5 >= 5.5.0)</p><p class="refpurpose"><span class="refname">boolval</span> — <span class="dc-title">Get the boolean value of a variable</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.boolval-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">boolean</span> <span class="methodname"><strong>boolval</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$var</code></span>
)</div>
<p class="para rdfs-comment">
Returns the <span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> value of <em><code class="parameter">var</code></em>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.boolval-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term"><em><code class="parameter">var</code></em></span>
<dd>
<p class="para">
The scalar value being converted to a <span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span>.
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.boolval-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The <span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> value of <em><code class="parameter">var</code></em>.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.boolval-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-5243">
<p><strong>Example #1 <span class="function"><strong>boolval()</strong></span> examples</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'0: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'42: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #0000BB">42</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'0.0: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #0000BB">0.0</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'4.2: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #0000BB">4.2</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'"": '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #DD0000">""</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'"string": '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #DD0000">"string"</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'"0": '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #DD0000">"0"</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'"1": '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(</span><span style="color: #DD0000">"1"</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'[1, 2]: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">([</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">]) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'[]: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">([]) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</span><span style="color: #007700">).</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'stdClass: '</span><span style="color: #007700">.(</span><span style="color: #0000BB">boolval</span><span style="color: #007700">(new </span><span style="color: #0000BB">stdClass</span><span style="color: #007700">) ? </span><span style="color: #DD0000">'true' </span><span style="color: #007700">: </span><span style="color: #DD0000">'false'</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>
0: false
42: true
0.0: false
4.2: true
"": false
"string": true
"0": false
"1": true
[1, 2]: true
[]: false
stdClass: true
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.boolval-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.floatval.html" class="function" rel="rdfs-seeAlso">floatval()</a> - Get float value of a variable</span></li>
<li class="member"> <span class="function"><a href="function.intval.html" class="function" rel="rdfs-seeAlso">intval()</a> - Get the integer value of a variable</span></li>
<li class="member"> <span class="function"><a href="function.strval.html" class="function" rel="rdfs-seeAlso">strval()</a> - Get string value of a variable</span></li>
<li class="member"> <span class="function"><a href="function.settype.html" class="function" rel="rdfs-seeAlso">settype()</a> - Set the type of a variable</span></li>
<li class="member"> <span class="function"><a href="function.is-bool.html" class="function" rel="rdfs-seeAlso">is_bool()</a> - Finds out whether a variable is a boolean</span></li>
<li class="member"><a href="language.types.type-juggling.html" class="link">Type juggling</a></li>
</ul>
</p>
</div>
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