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我在使用php進行搜索時遇到問題。我正在嘗試通過使用和html下拉框來更改要搜索的列。它也應該使用佔位符（％？％），以便我可以進行全局搜索。當我用字母'b'搜索任何東西時，它只顯示所有記錄（所有記錄（當它只顯示其中帶有字母'b'的記錄時）。使用php搜索數據，使用php
的代碼如下：
HTML（請這是不是一個編輯的版本，這個問題似乎是在PHP文件）：
<html lang="en" class=" js csstransforms3d csstransitions">
<head>
<script>
function showUser() {
var querycolumn = document.getElementById('querycolumn').value;
var query = document.getElementById('query').value;
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","contactsearching.php?querycolumn="+querycolumn+"&query="+query,true);
xmlhttp.send();
}
</script>
<script>
function userdata(str) {
if (str=="") {
document.getElementById("userdetail").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("userdetail").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","searchingforcontact.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<section class="flexform" style="display:inline-block;">
<div id="txtHint" style="padding-left:30px;padding-top:10px; padding-bottom:20px;"><b>The Contacts Which Are In The Contact Group Chosen Shall Be Displayed Here:</b></div>
<form>
<label style="clear:both;"><strong>Searching Parameter:</strong></label>
<select name="querycolumn" id="querycolumn" style="float:left;">
<option value="" selected disabled>Please Choose A Parameter To Search By</option>
<option value="CustomerID">Customer ID</option>
<option value="CustomerBusinessName">Business Name</option>
<option value="ContactPerson">Contact Person</option>
<option value="Department">Department</option>
<option value="OccupationalTitle">Occupational Title</option>
<option value="EmailAddress">Email Address</option>
<option value="PhoneNumber">Phone Number</option>
<option value="EXT">EXT</option>
<option value="FaxNumber">Fax Number</option>
<option value="BusinessAddress">Business Address</option>
<option value="BusinessCity">Business City</option>
<option value="BusinessState">Business State</option>
<option value="BusinessZipCode">Business Zip Code</option>
<option value="BusinessCountry">Business Country</option>
<option value="PostalAddress">Postal Address</option>
<option value="PostalCity">Postal City</option>
<option value="Comment">Comment</option>
</select>
<br></br>
<label style="clear:both;"><strong>Value Searching For:</strong></label><input type="text" name="query" style="float:left;" id="query" />
<input type="button" onclick='showUser()' value="Initiate Searching Sequence" style="float:left;"/>
<br></br>
</form>
</section>
</body></html>
PHP文件：
<?php
$querycolumn = $_GET['querycolumn'];
$query = $_GET['query'];
$con=mysqli_connect("localhost","user","password","my_db");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
echo "<table border='4'>
<tr>
<th>Customer ID</th>
<th>Customer Business Name</th>
<th>Contact Person</th>
<th>Department</th>
<th>Phone Number</th>
<th>Email Address</th>
<th>Comment</th>
</tr>";
$stmt=$con->prepare("SELECT CustomerID, CustomerBusinessName, ContactPerson, Department, PhoneNumber, EmailAddress, Comment FROM `Contacts` WHERE ? LIKE CONCAT('%',?,'%')");
$stmt->bind_param("ss", $querycolumn, $query);
$stmt->execute();
$stmt->bind_result($col1, $col2, $col3, $col4, $col5, $col6, $col7);
while ($stmt->fetch()) {
printf ("<tr> \n <td><a href onclick='userdata($col1)'>$col1</a></td> \n <td><a href='#' onclick='userdata($col1)'>$col2</a></td> \n <td><a href='#' onclick='userdata($col1)'>$col3</a></td> \n <td><a href='#' onclick='userdata($col1)'>$col4</a></td> \n <td><a href='#' onclick='userdata($col1)'>$col5</a></td> \n <td><a href='#' onclick='userdata($col1)'>$col6</a></td> <td><a href='#' onclick='userdata($col1)'>$col7</a></td> \n \n </tr>", $col1, $col1, $col1, $col2, $col1, $col3, $col1, $col4, $col1, $col5, $col1, $col6, $col1, $col7);
}
?>
任何幫助將不勝感激。
一件事，你不能做到這一點'其中' - 分配一個變量或選擇一個實際的列名。它不知道如何「向前看」。 –
嘗試使用'WHERE $ querycolumn LIKE'而不是'WHERE？ LIKE' –
非常感謝！ 它正在工作。把這個作爲答案，我會選擇它作爲最好的！ ：D – SML