所以，我最近将一个数据库从一台主机移动到另一台主机，还不得不移动用于显示数据的 HTML 和 php 页面，由于某种原因，它根本不会在页面上显示数据。我知道我的 php 页面正在连接到数据库，因为当我if在页面中使用简单语句时php，它确实显示了正确的数据。
该网站在以前的服务器和数据库主机上正常工作。
我的 HTML 代码是：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Olympic Scores</title>
<link href="../favicon.ico" rel="shortcut icon" />
<link href="css/tasks.css" rel="stylesheet" type="text/css" />
<link href="css/style2.css" rel="stylesheet" type="text/css" />
<link href="css/table.css" rel="stylesheet" type="text/css" /><script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script><script type="text/javascript" src="http://jzaefferer.github.com/jquery-validation/jquery.validate.js"></script>
<style type="text/css">label.error {
float: none; color: red; padding-left: 0.5em; padding-right: 1em; vertical-align: top;
}
</style>
<script>
$(document).ready(function(){
$("#medalValues").validate();
});
</script>
<style type="text/css">
</style>
</head>
<body>
<div class="container" id="wrapper">
<div class="header_style">
<h1><a href="link"><strong>Back to </strong>Portfolio</a></h1>
<div class="clear"></div>
</div>
<header>
<h1>Olympics<span> - London 2012</span></h1>
<h2>Medals Table</h2>
<h2></h2>
</header>
<div class="image_body">
<div class="image_effect" id="image_click">
<p>Copyright free image of a 2004 Olympics Gold Medal</p>
<p>2004 Olympics - Athens</p>
</div>
<span class="image_note">Keep clicked to show image</span></div>
<div class="content" id="home_page">
<p class="titles">Please assign the weight of the Gold Medals, Silver Medals and Bronze Medals:</p>
<p>(Only numbers are allowed)</p>
<nav>
<div>
<form id="medalValues" method="get"><label class="gold_label" for="gold_value">Gold Medals:</label> <input id="gold_value" name="gold_value" required="required" type="number" value="3" /> <label class="silver_label" for="silver_value">Silver Medals:</label> <input id="silver_value" name="silver_value" required="required" type="number" value="2" /> <label class="bronze_label" for="bronze_value">Bronze Medals:</label> <input id="bronze_value" name="bronze_value" required="required" type="number" value="1" /><br />
<p>Calculate Score Based on</p>
<br />
<label for="medals_only">Medals Only</label> <input id="medals_only" name="radio_button" onclick="no_medals_formula();" required="required" type="radio" value="opt1" /> <!--OnClick runs the function to display the formula used--> <label for="population">Population</label> <input id="population" name="radio_button" onclick="population_formula();" required="required" type="radio" value="opt2" /> <!--OnClick runs the function to display the formula used--> <label for="gdp">GDP</label> <input id="gdp" name="radio_button" onclick="gdp_formula();" required="required" type="radio" value="opt3" /> <!--OnClick runs the function to display the formula used--> <input type="submit" value="Submit" /><br />
<p id="formula_used"></p>
<table id="score_results">
</table>
</form>
</div>
<script>
//When document is ready
$(function() {
//Handles form submission
$('#medalValues').submit(function() {
var gold_value, silver_value, bronze_value, medals_only, population, gdp;
//Gets the values from the weight inputs, checks which radio is checked
gold_value = $("#gold_value").val();
silver_value = $("#silver_value").val();
bronze_value = $("#bronze_value").val();
medals_only = $("#medals_only").is(':checked');
gdp = $("#gdp").is(':checked');
population = $("#population").is(':checked');
getResults( gold_value, silver_value, bronze_value, medals_only, population, gdp );
//Stops the form submitting
return false;
});
});
function getResults ( gold_value, silver_value, bronze_value, medals_only, population, gdp ) {
$.get('view.php', {gold_value: gold_value, silver_value: silver_value, bronze_value: bronze_value, medals_only: medals_only, population: population, gdp: gdp} , function(data) {
postResults(data);
});
}
function postResults (data) {
//Turns the string into json
var json = $.parseJSON(data);
//Inputs the table headings for the html table
var output = "<colgroup><col class=oce-first /><col class=oce-second /><col class=oce-third /><col class=oce-fourth /><col class=oce-fifth /></colgroup><tr><th class=rank_header scope=col>Rank</th><th class=rank_country scope=col>Country Name</th><th class=score_header scope=col>Score</th><th class=gdp_header scope=col>GDP</th><th class=population_header scope=col>Population</th>";
for (i = 0; i < json.length; i++) {
//Loops through and posts them into a html table
output+= "<tr class=spacing>"
output+= "<td id=selected_rank>" + (i+1) + "</td>"
output+= "<td>" + json[i].country + "</td>"
output+= "<td id=selected_score>" + json[i].score + "</td>"
output+= "<td>" + json[i].gdp + "</td>"
output+= "<td>" + json[i].population + "</td>"
output+= "</tr>"
}
// Push the output html into the results table
$("#score_results").html(output);
}
</script></nav>
</div>
<div class="footer_style">
<h1><strong>Part of my </strong>Portfolio</h1>
<div class="clear"></div>
</div>
<!--Functions to update the element wihth id=formula_used to change the text depending on which radio button the user selected--><script>
function no_medals_formula() {
document.getElementById("formula_used").innerHTML="The Formula used was: (gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value) <br/>Rounded to 2 d.p";
}
function population_formula() {
document.getElementById("formula_used").innerHTML="The Formula used was: ((gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value)) / (population / Million) <br/>Rounded to 2 d.p";
}
function gdp_formula() {
document.getElementById("formula_used").innerHTML="The Formula used was: ((gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value)) / (gdp / 10 Billion) <br/>Rounded to 2 d.p";
}
</script></div>
</body>
</html>
我的php代码是：
<?php
require_once 'MDB2.php'
$hostname="hostname.hostedresource.com";
$username="username";
$password="password";
$dbname="dbname";
$usertable="usertable";
$yourfield = "ISO_id";
mysql_connect($hostname,$username, $password) or die ("<html><script language='JavaScript'>alert('Unable to connect to database! Please try again later.'),history.go(-1)</script></html>");
mysql_select_db($dbname);
# Check If Record Exists
$dsn = "mysql://$username:$password@$hostname/$dbname";
$db =& MDB2::connect($dsn);
if(PEAR::isError($db)){
die($db->getMessage());
}
$db->setFetchMode(MDB2_FETCHMODE_ASSOC);
//Gets the values the user assigned to Gold, Silver and Bronze
$gold_value = $_GET["gold_value"];
$silver_value = $_GET["silver_value"];
$bronze_value = $_GET["bronze_value"];
$medals_only = $_GET["medals_only"];
$population = $_GET["population"];
$gdp = $_GET["gdp"];
//If statements that choose which sql statement to run.
//sql statement that gets run when user selects to calculate score without using population or gdp, orders it by score, and stops after reaching 10.
if ($medals_only == 'true') {
$sql="SELECT gold, silver, bronze, gdp, population, country_name, ROUND(((gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value)),2) as score
FROM $usertable
ORDER BY score DESC LIMIT 0,10";
//sql statement that gets run when user selects to calculate score witH population, orders it by score, and stops after reaching 10.
}
else if($population == 'true'){
$sql="SELECT gold, silver, bronze, gdp, population, country_name, ROUND(((gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value)) / (population / 1000000),2) as score
FROM $usertable
ORDER BY score DESC LIMIT 0,10";
//sql statement that gets run when user selects to calculate score with gdp, orders it by score, and stops after reaching 10.
}
else if($gdp == 'true'){
$sql="SELECT gold, silver, bronze, gdp, population, country_name, ROUND(((gold * $gold_value) + (silver * $silver_value) + (bronze * $bronze_value)) / (gdp / 10000000000),2) as score
FROM $usertable
ORDER BY score DESC LIMIT 0,10";
}
$res =& $db->query($sql);
if(PEAR::isError($res)){
die($res->getMessage());
}
echo json_encode($res->fetchAll() );
?>
当我直接进入 php 时，page-view.php我得到了错误
MDB2 错误：未知错误