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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.floatval" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>floatval</refname>
<refpurpose>Get float value of a variable</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>float</type><methodname>floatval</methodname>
<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
</methodsynopsis>
<para>
Gets the <type>float</type> value of <parameter>value</parameter>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
May be any scalar type. <function>floatval</function> should not be used
on objects, as doing so will emit an <constant>E_WARNING</constant> level
error and return 1.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The float value of the given variable. Empty arrays return 0, non-empty
arrays return 1.
</para>
<para>
Strings will most likely return 0 although this depends on the
leftmost characters of the string. The common rules of
<link linkend="language.types.float.casting">float casting</link>
apply.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
The error level when converting from object was changed from <constant>E_NOTICE</constant> to <constant>E_WARNING</constant>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>floatval</function> Example</title>
<programlisting role="php">
<![CDATA[
<?php
$var = '122.34343The';
$float_value_of_var = floatval($var);
echo $float_value_of_var; // 122.34343
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title><function>floatval</function> non-numeric leftmost characters Example</title>
<programlisting role="php">
<![CDATA[
<?php
$var = 'The122.34343';
$float_value_of_var = floatval($var);
echo $float_value_of_var; // 0
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>boolval</function></member>
<member><function>intval</function></member>
<member><function>strval</function></member>
<member><function>settype</function></member>
<member><link linkend="language.types.type-juggling">Type juggling</link></member>
</simplelist>
</para>
</refsect1>
</refentry>
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