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

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

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>    (PHP 4 &#62;= 4.2.0, PHP 5)</P
>fmod&nbsp;--&nbsp;返回除法的浮点数余数</DIV
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>说明</H2
>float <B
CLASS="methodname"
>fmod</B
> ( float x, float y )<BR
></BR
><P
>&#13;     返回被除数（<CODE
CLASS="parameter"
>x</CODE
>）除以除数（<CODE
CLASS="parameter"
>y</CODE
>）所得的浮点数余数。余数（<CODE
CLASS="varname"
>r</CODE
>）的定义是：x
     = i * y + r，其中 <CODE
CLASS="varname"
>i</CODE
> 是整数。如果 <CODE
CLASS="parameter"
>y</CODE
>
     是非零值，则 <CODE
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>r</CODE
> 和
     <CODE
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> 的符号相同并且其数量值小于
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>例 1. 使用 <B
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>fmod()</B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$x </font><font color="#007700">= </font><font color="#0000BB">5.7</font><font color="#007700">;<br /></font><font color="#0000BB">$y </font><font color="#007700">= </font><font color="#0000BB">1.3</font><font color="#007700">;<br /></font><font color="#0000BB">$r </font><font color="#007700">= </font><font color="#0000BB">fmod</font><font color="#007700">(</font><font color="#0000BB">$x</font><font color="#007700">, </font><font color="#0000BB">$y</font><font color="#007700">);<br /></font><font color="#FF8000">// $r equals 0.5, because 4 * 1.3 + 0.5 = 5.7<br /></font><font color="#0000BB">?&gt;</font>
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