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 3, PHP 4, PHP 5)</P
>current&nbsp;--&nbsp;返回数组中的当前单元</DIV
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>说明</H2
>mixed <B
CLASS="methodname"
>current</B
> ( array &#38;array )<BR
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>&#13;     每个数组中都有一个内部的指针指向它“当前的”单元，初始指向插入到数组中的第一个单元。
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>&#13;     <B
CLASS="function"
>current()</B
> 函数返回当前被内部指针指向的数组单元的值，并不移动指针。如果内部指针指向超出了单元列表的末端，<B
CLASS="function"
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>&#13;       如果数组包含有空的单元（0 或者 ""，空字符串）则本函数在碰到这个单元时也返回
       <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。这使得用 <B
CLASS="function"
>current()</B
> 不可能判断是否到了此数组列表的末端。要正确遍历可能含有空单元的数组，用
       <A
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>each()</B
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> 函数。
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>例 1. <B
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> 及相关函数的用法示例</B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$transport </font><font color="#007700">= array(</font><font color="#DD0000">'foot'</font><font color="#007700">, </font><font color="#DD0000">'bike'</font><font color="#007700">, </font><font color="#DD0000">'car'</font><font color="#007700">, </font><font color="#DD0000">'plane'</font><font color="#007700">);<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">); </font><font color="#FF8000">// $mode = 'foot';<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">next</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">);&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// $mode = 'bike';<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">); </font><font color="#FF8000">// $mode = 'bike';<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">prev</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">);&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// $mode = 'foot';<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">end</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// $mode = 'plane';<br /></font><font color="#0000BB">$mode </font><font color="#007700">= </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$transport</font><font color="#007700">); </font><font color="#FF8000">// $mode = 'plane';<br /></font><font color="#0000BB">?&gt;</font>
</font>
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>&#13;     参见 <A
HREF="function.end.html"
><B
CLASS="function"
>end()</B
></A
>，<A
HREF="function.key.html"
><B
CLASS="function"
>key()</B
></A
>，<A
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><B
CLASS="function"
>next()</B
></A
>，<A
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><B
CLASS="function"
>prev()</B
></A
>
     和 <A
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><B
CLASS="function"
>reset()</B
></A
>。
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