我正在开发PHP和PHP中的一个小搜索引擎。 MySQL的。昨天，我重新设置了（我只在HTML部分进行了更改，没有触及任何PHP代码）结果页面，之后我无法搜索一个术语。
新代码：
<?php
header( 'Cache-Control: no-store, no-cache, must-revalidate' );
header( 'Cache-Control: post-check=0, pre-check=0', false );
header( 'Pragma: no-cache' );
require_once("lucene.php");
?>
<?php
$row1 = [];
$row2 = [];
$search_word = false;
if(isset($_POST["submit"])) {
//edit this with your credentials
$con = mysqli_connect("localhost", "root", "pass", "db");
if(mysqli_connect_error()) echo "Connection Fail";
else {
$search_word = true;
$input = $_POST["s_input"];
// tokenize input
$tokens = tokenize($input);
//compute weight of every token
$token_weight = compute_weight($tokens, $con);
$sql1 = "SELECT *, match(description) against('". $input ."') as score FROM web where match(description) against('".$input."') order by score desc";
$sql2 = "SELECT *, match(description) against('". $input ."') as score FROM web where match(description) against('".$input."') order by score desc";
$result1 = mysqli_query($con, $sql1);
$result2 = mysqli_query($con, $sql2);
$sql3 = "SELECT * FROM web";
$numDocs = (mysqli_num_rows(mysqli_query($con, $sql3)));
$maxOverlap = sizeof($tokens);
$ctr2 = 0;
while($ctr2 != $maxOverlap){
//compute inverse_document_frequency of term
$sql3 = "SELECT *, match(description) against('".$tokens[$ctr2]."') FROM web where match(description) against('".$tokens[$ctr2]."')";
$docFreq = (mysqli_num_rows(mysqli_query($con, $sql3)));
$idf[$tokens[$ctr2]] = idf($numDocs, $docFreq);
$ctr2++;
}
$ctr = 0;
while($r1 = mysqli_fetch_array($result1)){
$row1[$ctr]['ID'] = $r1['ID'];
$row1[$ctr]['title'] = $r1['title'];
$row1[$ctr]['description'] = highlight_words($r1['description'], $tokens);
$row1[$ctr]['credit'] = $r1['credit'];
$row1[$ctr]['url'] = $r1['url'];
$document = strtolower($row1[$ctr]['description']);
$ctr2 = 0;
$summation = 0;
while ($ctr2 != sizeof($tokens)) {
//compute term_frequency(term in document)
$term_frequency = tf($tokens[$ctr2], $document);
//get idf of term
$inverse_document_frequency = $idf[$tokens[$ctr2]];
//compute norm
$norm = norm($document);
$ctr2++;
$summation += $term_frequency*$inverse_document_frequency*$inverse_document_frequency*$norm;
}
$queryNorm = queryNorm($idf, $tokens);
$coord = coord($tokens, $document, $token_weight);
$lucene_score = $summation * $coord * $queryNorm;
$row1[$ctr]['score'] = $lucene_score;
$ctr++;
}
$row1 = orderBy($row1);
/*
desc score = number of word ocurrences * weight + match_against weight
+ 2(if exact words occur)
*/
$ctr = 0;
while($r2 = mysqli_fetch_array($result2)){
$row2[$ctr]['ID'] = $r2['ID'];
$row2[$ctr]['title'] = $r2['title'];
$row2[$ctr]['description'] = highlight_words($r2['description'], $tokens);
$row2[$ctr]['credit'] = $r2['credit'];
$row2[$ctr]['url'] = $r2['url'];
$desc = strtolower($row2[$ctr]['description']);
$ctr2 = 0;
$total_weight = 0;
$flag = 0;
while ($ctr2 != sizeof($tokens)) {
$weight = substr_count($desc, $tokens[$ctr2]) * $token_weight[$tokens[$ctr2]];
if ($weight == 0)
$flag++;
$total_weight += $weight;
$ctr2++;
}
//occurence of exact word * weight * 2
$exact_word_weight = substr_count($desc, $input) * $total_weight * 5;
$total_weight += $flag;
$row2[$ctr]['score'] = $r2['score'] + $total_weight + $exact_word_weight;
$ctr++;
}
$row2 = orderBy($row2);
}
mysqli_close($con);
}
?>
<!DOCTYPE>
<html>
<head>
<TITLE>Search Engine</TITLE>
<link rel="stylesheet" type="text/css" href="css/reset.css">
<link rel="stylesheet" type="text/css" href="css/search.css">
<!-- jQuery -->
<script src="js/jquery.js"></script>
<!-- Solve Simplex JavaScript -->
<script src="js/validation.js"></script>
</head>
<body>
<div id="wrapper">
<nav>
<form name="search_form" id="search_form" validate method="post">
<div class="left">
<a href="#"><img src="images/logo.png" attr="google logo"></a>
<input type="text" class="textbox" id="obj_function" name="s_input">
<button type="submit" id="search_button" name="submit">
</form>
</div>
<div class="right">
<a href="#" id="box"><img src="images/button.png"></a>
<a href="#" id="sign_in">Sign In</a>
</div>
</nav>
<div class="nav2">
<ul>
<li class="active">Web</li>
<li><a href="">Images</a> </li>
<li><a href="">Videos</a></li>
<li><a href="">More <span><img src="images/dropdown.png"></span></a></li>
<li><a href="">Search Tools</a></li>
</ul>
</div>
<div class="search_results">
<ol>
<li>
<?php
$ctr = 0;
while ($ctr != count($row2)){
echo "<h1><a href=''#'> ".$row2[$ctr]['title']."</a></h1>";
echo "<div class='grey_green_links'>";
echo "<p class='green'>".$row2[$ctr]['url']."<span><img src='images/search_result_link_dropdown.png'></span></p>";
echo "<tr class = 'active'><td>"."<b>Description: </b>".($row2[$ctr]['description']."</td><td></td></tr>");
echo "<tr><td><br></br></td><td></td></tr>";
$ctr++;
}
?>
</li>
</ol>
<div class="page_nav">
<img src="images/pagination_logo.png" alt="pagination page logo">
<ol>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
<li><a href="#">4</a></li>
<li><a href="#">5</a></li>
<li><a href="#">6</a></li>
<li><a href="#">7</a></li>
<li><a href="#">8</a></li>
<li><a href="#">9</a></li>
<li id="next"><a href="#">10</a></li>
<li><a href="#">Next</a></li>
</ol>
</div>
<footer>
<div class="top">
<p>
<img src="images/your_location_dot.png">
<span class="light_grey">Mars, TX - From your Internet address -</span> Use precise lcoation - Learn more
</p>
</div>
<div class="bottom">
<ul>
<li>Help</li>
<li>Send feedback</li>
<li>Privacy</li>
<li>Terms</li>
</ul>
</div>
</footer>
</div>
</body>
</html>
我个人认为这段代码中存在错误，但我无法弄清楚它应该在哪里。有人可以看一下，也许可以帮帮忙吗？
<form name="search_form" id="search_form" validate method="post">
<div class="left">
<a href="#"><img src="images/logo.png" attr="google logo"></a>
<input type="text" class="textbox" id="obj_function" name="s_input">
<button type="submit" id="search_button" name="submit">
</form>
答案 0 :(得分：0)
我重新做了一点点工作，感谢所有人的帮助。