Discuss the specific methods of implementing on-site search engines in PHP

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Discuss the specific methods of implementing on-site search engines in PHP_PHP Tutorial

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Jul 15, 2016 pm 01:29 PM

php specific use Can exist accomplish actual us Discuss search engine method of coding

In actual coding, we can use The following is the specific code to implement the on-site search engine in PHP:

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><strong><font color="#006699"><?</FONT></STRONG></SPAN><SPAN>   </SPAN></SPAN><LI class=""><SPAN></SPAN><SPAN class=tag-name><STRONG><FONT color=#006699>include</FONT></STRONG></SPAN><SPAN>("include/common.inc");   </SPAN></SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>title</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>"Search"</FONT></SPAN><SPAN>;   </SPAN></SPAN><LI class=""><SPAN>include("include/header.inc");   </SPAN><LI class=alt><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></font></strong></span><span>   </span></span></li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>P</SPAN><SPAN class=tag>></span></font></strong><span>   </span>
</li>
<li class="alt">
<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>FORM</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>ACTION</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"<? echo "</FONT></SPAN><SPAN>$PHP_SELF"; </SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></span></font></strong><span>" </span><span class="attribute"><font color="#ff0000">METHOD</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">"POST"</font></span><span class="tag"><strong><font color="#006699">></font></strong></span><span>   </span>
</li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>INPUT</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>TYPE</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"text"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>NAME</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"searchstr"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>value</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"<? echo "</FONT></SPAN><SPAN>$searchstr"; </SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></span></font></strong><span>"   </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">SIZE</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">"20"</font></span><span> </span><span class="attribute"><font color="#ff0000">MAXLENGTH</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">"30"</font></span><span class="tag"><strong><font color="#006699">></font></strong></span><span>   </span>
</li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>INPUT</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>TYPE</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"submit"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>VALUE</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"Search!"</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span>   </span>
</li>
<li class="alt">
<span></span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>FORM</SPAN><SPAN class=tag>></span></font></strong><span>   </span>
</li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>P</SPAN><SPAN class=tag>></span></font></strong><span>   </span>
</li>
<li class="alt">
<span></span><span class="tag"><strong><font color="#006699"><?</FONT></STRONG></SPAN><SPAN>   </SPAN></SPAN><LI class=""><SPAN></SPAN><SPAN class=tag-name><STRONG><FONT color=#006699>if</FONT></STRONG></SPAN><SPAN> ( ! empty($searchstr) )   </SPAN></SPAN><LI class=alt><SPAN>{   </SPAN><LI class=""><SPAN>// empty()用来检查查询字串是否为空   </SPAN><LI class=alt><SPAN>// 如果不为空，调用grep查询   </SPAN><LI class=""><SPAN>echo "</SPAN><STRONG><FONT color=#006699><SPAN class=tag><</SPAN><SPAN class=tag-name>HR</SPAN><SPAN class=tag>></font></strong></span><span>n";   </span>
</li>
<li class="alt"><span>// 调用grep对所有文件进行大小写非敏感模式的查询   </span></li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">cmdstr</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">"grep -i $searchstr *"</font></span><span>;   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">fp</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">popen</font></span><span>( $cmdstr, "r" ); // 执行命令并输出管道   </span>
</li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">myresult</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>(); // 存储查询结果   </span>
</li>
<li class="alt">
<span>while( $</span><span class="attribute"><font color="#ff0000">buffer</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">fgetss</font></span><span> ($fp, 4096))   </span>
</li>
<li class=""><span>{   </span></li>
<li class="alt"><span>// grep返回这样格式： 文件名：匹配字串出现行数   </span></li>
<li class=""><span>// 因此我们利用函数split()分离处理数据   </span></li>
<li class="alt"><span>list($fname, $fline) = split(":",$buffer, 2);   </span></li>
<li class=""><span>// 我们只输出第一次匹配的结果   </span></li>
<li class="alt"><span>if ( !defined($myresult[$fname]))   </span></li>
<li class=""><span>$myresult[$fname] = $fline;   </span></li>
<li class="alt"><span>}   </span></li>
<li class=""><span>// 现在我们将结果存储在数组中，下面就可以处理并输出了   </span></li>
<li class="alt"><span>if ( count($myresult) )   </span></li>
<li class=""><span>{   </span></li>
<li class="alt">
<span>echo "</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>OL</SPAN><SPAN class=tag>></span></font></strong><span>n";   </span>
</li>
<li class=""><span>while(list($fname,$fline) = each($myresult))   </span></li>
<li class="alt">
<span>echo "</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>LI</SPAN><SPAN class=tag>></span></font></strong><span>   </span>
</li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>A</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>HREF</FONT></SPAN><SPAN>="$fname"</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span>$fname</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>A</SPAN><SPAN class=tag>></span></font></strong><span> : $fline </span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>LI</SPAN><SPAN class=tag>></span></font></strong><span>n";   </span>
</li>
<li class="alt">
<span>echo "</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>OL</SPAN><SPAN class=tag>></span></font></strong><span>n";   </span>
</li>
<li class=""><span>}   </span></li>
<li class="alt"><span>else   </span></li>
<li class=""><span>{   </span></li>
<li class="alt"><span>// 如果没有查询结果   </span></li>
<li class="">
<span>echo "Sorry. Search on </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>B</SPAN><SPAN class=tag>></span></font></strong><span>$searchstr</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>B</SPAN><SPAN class=tag>></span></font></strong><span>   </span>
</li>
<li class="alt">
<span>returned no results.</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>BR</SPAN><SPAN class=tag>></span></font></strong><span>n";   </span>
</li>
<li class=""><span>}   </span></li>
<li class="alt"><span>pclose($fp);   </span></li>
<li class=""><span>}   </span></li>
<li class="alt">
<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>   </span>
</li>
<li class="">
<span></span><span class="tag"><strong><font color="#006699"><?</FONT></STRONG></SPAN><SPAN>   </SPAN></SPAN><LI class=alt><SPAN></SPAN><SPAN class=tag-name><STRONG><FONT color=#006699>include</FONT></STRONG></SPAN><SPAN>("include/footer.inc");   </SPAN></SPAN><LI class=""><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></font></strong></span><span>  </span>
</li>
</ol>

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How about, through the understanding of the above code, whether the novices have mastered PHP to implement the on-site search engine What is the specific method?

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