📄 function.php-ereg_replace.htm
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<td valign=middle nowrap><font color=e06060 size=+2><b>函数:ereg_replace()</b></font></td>
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<div align=right><a href="group.php-43.htm" alt="group.php?43">正则表达式函数库</a></div><br><h1><font color=0000bb>ereg_replace</font></h1><p>
字符串比对解析并取代。<p>
<font color=ff8000>语法:</font> <b>string ereg_replace(string pattern, string replacement, string string);</b><p>
<font color=ff8000>返回值:</font> 字符串<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>本函数以 pattern 的规则来解析比对字符串 string，欲取而代之的字符串为参数 replacement。返回值为字符串类型，为取代后的字符串结果。<p>
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<tr><td align=left><font color=ff8000>使用范例</font></td></tr></table><p><font color="#000000">
ken@freebsdrocks.com 在 16-Mar-1999 提出的例子。<br><br><font color="#0000BB"><?php<br>$text </font><font color="#007700">= </font><font color="#DD0000">'This is a {1} day, not {2} and {3}.'</font><font color="#007700">;<br></font><font color="#0000BB">$daytype </font><font color="#007700">= array( </font><font color="#0000BB">1 </font><font color="#007700">=> </font><font color="#DD0000">'fine'</font><font color="#007700">,<br> </font><font color="#0000BB">2 </font><font color="#007700">=> </font><font color="#DD0000">'overcast'</font><font color="#007700">,<br> </font><font color="#0000BB">3 </font><font color="#007700">=> </font><font color="#DD0000">'rainy' </font><font color="#007700">);<br>while (</font><font color="#0000BB">ereg </font><font color="#007700">(</font><font color="#DD0000">'{([0-9]+)}'</font><font color="#007700">, </font><font color="#0000BB">$text</font><font color="#007700">, </font><font color="#0000BB">$regs</font><font color="#007700">)) {<br> </font><font color="#0000BB">$found </font><font color="#007700">= </font><font color="#0000BB">$regs</font><font color="#007700">[</font><font color="#0000BB">1</font><font color="#007700">];<br> </font><font color="#0000BB">$text </font><font color="#007700">= </font><font color="#0000BB">ereg_replace</font><font color="#007700">(</font><font color="#DD0000">"\{"</font><font color="#007700">.</font><font color="#0000BB">$found</font><font color="#007700">.</font><font color="#DD0000">"\}"</font><font color="#007700">, </font><font color="#0000BB">$daytype</font><font color="#007700">[</font><font color="#0000BB">$found</font><font color="#007700">], </font><font color="#0000BB">$text</font><font color="#007700">);<br>}<br>echo </font><font color="#DD0000">"$text</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br></font><font color="#FF8000">// This is a fine day, not overcast and rainy. <br></font><font color="#0000BB">?><br></font><br>ken@freebsdrocks.com 并同时提出具有相同功能的perl 程序范例如下：<br><br>$text = 'This is a {1} day, not {2} and {3}.';<br>%daytype = ( 1 => 'fine',<br> 2 => 'overcast',<br> 3 => 'rainy' );<br>$text =~ s/{(\d+)}/$daytype{$1}/eg;<br>print "$text\n";</font>
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<tr><td align=left><font color=ff8000>参考</font></td></tr></table><p><a href="function.php-ereg.htm" alt="function.php?ereg">ereg()</a> <a href="function.php-eregi.htm" alt="function.php?eregi">eregi()</a> <a href="function.php-eregi_replace.htm" alt="function.php?eregi_replace">eregi_replace()</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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