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<td valign=middle nowrap><font color=e06060 size=+2><b>函数:uksort()</b></font></td>
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<div align=right><a href="group.php-3.htm" alt="group.php?3">数组处理函数库</a></div><br><h1><font color=0000bb>uksort</font></h1><p>
将数组的索引依用户自定的函数排序。<p>
<font color=ff8000>语法:</font> <b>void uksort(array array, function cmp_function);</b><p>
<font color=ff8000>返回值:</font> 无<p>
<font color=ff8000>函数种类:</font> 资料处理<p>
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<tr><td align=left><font color=ff8000>内容说明</font></td></tr></table><p>本函数将数组的索引依用户自定的方式重排，cmp_function 即用户自行开发的函数。<p>
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<tr><td align=left><font color=ff8000>使用范例</font></td></tr></table><p><font color="#000000">
<font color="#0000BB"><?<br></font><font color="#007700">function </font><font color="#0000BB">mycompare</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">$b</font><font color="#007700">) {<br> if (</font><font color="#0000BB">$a </font><font color="#007700">== </font><font color="#0000BB">$b</font><font color="#007700">) return </font><font color="#0000BB">0</font><font color="#007700">;<br> return (</font><font color="#0000BB">$a </font><font color="#007700">> </font><font color="#0000BB">$b</font><font color="#007700">) ? -</font><font color="#0000BB">1 </font><font color="#007700">: </font><font color="#0000BB">1</font><font color="#007700">;<br>}<br></font><font color="#0000BB">$a </font><font color="#007700">= array(</font><font color="#0000BB">4 </font><font color="#007700">=> </font><font color="#DD0000">"four"</font><font color="#007700">, </font><font color="#0000BB">3 </font><font color="#007700">=> </font><font color="#DD0000">"three"</font><font color="#007700">, </font><font color="#0000BB">20 </font><font color="#007700">=> </font><font color="#DD0000">"twenty"</font><font color="#007700">, </font><font color="#0000BB">10 </font><font color="#007700">=> </font><font color="#DD0000">"ten"</font><font color="#007700">);<br></font><font color="#0000BB">uksort</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">mycompare</font><font color="#007700">);<br>while(list(</font><font color="#0000BB">$key</font><font color="#007700">, </font><font color="#0000BB">$value</font><font color="#007700">) = </font><font color="#0000BB">each</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">)) {<br> echo </font><font color="#DD0000">"$key: $value</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br>}<br></font><font color="#0000BB">?><br></font><br>上面的程序返回资料为<br>20: twenty<br>10: ten<br>4: four<br>3: three</font>
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<tr><td align=left><font color=ff8000>参考</font></td></tr></table><p><a href="function.php-arsort.htm" alt="function.php?arsort">arsort()</a> <a href="function.php-asort.htm" alt="function.php?asort">asort()</a> <a href="function.php-ksort.htm" alt="function.php?ksort">ksort()</a> <a href="function.php-rsort.htm" alt="function.php?rsort">rsort()</a> <a href="function.php-sort.htm" alt="function.php?sort">sort()</a> <a href="function.php-uasort.htm" alt="function.php?uasort">uasort()</a> <p><hr size=1><br>如果你对此手册有任何问题,请到下面网址提问: <a href="www.web745.com">WEB开发知识库</a> (<a href="http://www.web745.com">www.web745.com</a>)<p>
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