Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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>floatval</H1
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><P
>    (PHP 4 &#62;= 4.2.0, PHP 5)</P
>floatval&nbsp;--&nbsp;获取变量的浮点值</DIV
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><H2
>描述</H2
>float <B
CLASS="methodname"
>floatval</B
> ( mixed var )<BR
></BR
><P
>&#13;     返回变量 <CODE
CLASS="parameter"
>var</CODE
>
     的 <A
HREF="language.types.float.html"
><B
CLASS="type"
>float</B
></A
> 数值。
    </P
><P
>&#13;     <CODE
CLASS="parameter"
>var</CODE
> 可以是任何标量类型。你不能将
     <B
CLASS="function"
>floatval()</B
> 用于数组或对象。
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$var </font><font color="#007700">= </font><font color="#DD0000">'122.34343The'</font><font color="#007700">;<br /></font><font color="#0000BB">$float_value_of_var </font><font color="#007700">= </font><font color="#0000BB">floatval </font><font color="#007700">(</font><font color="#0000BB">$var</font><font color="#007700">);<br />print </font><font color="#0000BB">$float_value_of_var</font><font color="#007700">; </font><font color="#FF8000">// 打印出 122.34343<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
    </P
><P
>&#13;     参见 <A
HREF="function.intval.html"
><B
CLASS="function"
>intval()</B
></A
>、<A
HREF="function.strval.html"
><B
CLASS="function"
>strval()</B
></A
>、<A
HREF="function.settype.html"
><B
CLASS="function"
>settype()</B
></A
> 和
     <A
HREF="language.types.type-juggling.html"
>类型戏法</A
>。
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