我能够确认我的SESSION变量将包含一个值，但是下次我运行我的函数时会说：注意：未定义的变量：第94行的C：\ xampp \ htdocs \ Reports_db \ getvalue.php中的_SESSION
我认为会话将保留其值，除非会话被销毁？为什么我没有得到会话的价值？有什么想法吗？
这是PHP文件（UI）
<!DOCTYPE html>
<?php include ('includes/header.php');?>
<navigation>
<div id="nav-bar">
<ul class="nav nav-pills nav-justified">
<li role="p_resentation"><a href="index.php">Home</a></li>
<li role="p_resentation" class="active"><a href="#">Sales</a></li>
<li role="p_resentation"><a href="manufacturing.php">Manufacturing</a></li>
</ul>
</div>
</navigation>
<br />
<div class="row" id="row1">
<div class="col-sm-8" id="row1-sm8">
<div class="panel panel-default">
<div class="panel-heading" id="content-heading">
<form action"" class="form-inline">
<div class="form-group">
<select name="users" onchange="getvalue(this.value)" class="btn btn-default dropdown-toggle form-control" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
<option value="">Select a field:</option>
<option value="1">Product Name</option>
<option value="2">SO #</option>
<option value="3">Assembly Name</option>
<option value="4">Sales Person</option>
<option value="5">Customer Name</option>
<option value="6">PO / Remarks</option>
<option value="7">SO Status</option>
<option value="8">Delivery Status</option>
</select>
</div>
<div class="form-group">
<div class="input-group">
<span class="input-group-addon" id="basic-addon1">@</span>
<input type="text" id="search" onchange="search(this.value)" class="form-control" placeholder="Username" aria-describedby="basic-addon1" value="">
</div>
</div>
<div class="form-group">
<input type="button" id="search_btn" onclick="search(this.value)" class="form-control" placeholder="Username" aria-describedby="basic-addon1" value="">
</div>
</form>
</div>
<div>
<table class="table">
<div class="panel-body" id="output">
</div>
</table>
</div>
</div>
</div>
<div class="col-sm-4" id="row1-sm4">
<div class="panel panel-default">
<div class="panel-heading" id="login-heading">Filters</div>
<div class="panel-body">
<div class="row">
<div class="col-sm-12">
<br/>
<table class="table">
<tr>
<td>Field</td>
<td>Value</td>
</tr>
</table>
</div>
</div><br />
</div>
</div>
</div>
</div>
<?php include ('includes/footer.php'); ?>
<script>
function getvalue(str) {
if (str == "") {
document.getElementById("output").innerHTML = "";
return;
} else {
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 (this.readyState == 4 && this.status == 200) {
document.getElementById("output").innerHTML = this.responseText;
}
};
xmlhttp.open("GET","_db/getvalue.php?q="+str,true);
xmlhttp.send();
}
}
function search(str) {
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 (this.readyState == 4 && this.status == 200) {
document.getElementById("output").innerHTML = this.responseText;
}
};
xmlhttp.open("GET","_db/getvalue.php?q=9",true);
xmlhttp.send();
}
$(document).ready(function(){
$("#search_btn").click(function(){
var x = $("#search").val();
search(x);
});
$("#search").keyup (function(){
var x = $("#search").val();
search(x);
});
});
</script>
以下是我使用会话的代码
<html>
<body>
<table class="table">
<?php
include('../includes/links/js.php');
include('../includes/links/css.php');
include('/connection/connect.php');
if (isset($_GET['q'])){
$val = $_GET['q'];
if ($val < 9) {
$field = '';
$field_s = '';
$group = '';
if ($val == 1) {
$field = "(SELECT pp1.name_template FROM product_product pp1 WHERE boml.product_id = pp1.id) as BOML";
$field_s ="(SELECT pp1.name_template FROM product_product pp1 WHERE boml.product_id = pp1.id)";
$group = "BOML";
} elseif ($val == 2) {
$field == "so.name";
$group = "SO";
$field_s = "so.name";
} elseif ($val == 3) {
$field = "sol.name as assembly";
$group = "assembly";
$field_s = "sol.name";
} elseif ($val == 4) {
$field = "split_part(u.login, '@', 1) as sales_person";
$group = "sales_person";
$field_s = "split_part(u.login, '@', 1)";
} elseif ($val == 5) {
$field = "c.display_name as Customer";
$group = "Customer";
$field_s = "c.display_name";
} elseif ($val == 6) {
$field = "so.note as PO";
$group = "PO";
$field_s = "so.note";
} elseif ($val == 7) {
$field = "so.state as Status";
$group = "Status";
$field_s = "so.state";
} elseif ($val == 8) {
$field = "COALESCE(del.state, 'Waiting Availability') del_status";
$group = "del_status";
$field_s = "COALESCE(del.state, 'Waiting Availability')";
}
$query = " FROM sale_order so
INNER JOIN sale_order_line sol
ON so.id = sol.order_id
INNER JOIN res_partner as c
ON so.partner_id = c.id
LEFT JOIN account_payment_term as ap
ON so.payment_term_id = ap.id
INNER JOIN product_uom as pu
ON sol.product_uom = pu.id
LEFT JOIN account_tax_sale_order_line_rel as acs
ON sol.id = acs.sale_order_line_id
LEFT JOIN account_tax as at
ON acs.account_tax_id = at.id
INNER JOIN product_template as pt
ON sol.product_id = pt.id
LEFT JOIN mrp_bom as bom
ON pt.id = bom.product_tmpl_id
LEFT JOIN mrp_bom_line as boml
ON bom.id = boml.bom_id
INNER JOIN res_users as u
On so.create_uid = u.id
Left Join (Select sp1.id, sp1.origin, sp1.state, spo1.qty_done, spo1.product_id, spo1.picking_id, sp1.date_done
From stock_picking as sp1
Full Join stock_pack_operation as spo1
On sp1.id = spo1.picking_id) as del
On so.name = del.origin
And sol.product_id = del.product_id";
if ($val != 2){
$query = "
SELECT Distinct ".$field." ".$query." Order By ".$group;
$_SESSION['being_used'] = "SELECT Distinct ".$field." ".$query;
$_SESSION['field'] = $field;
echo 'set ok';
} else {
$query = "
SELECT Distinct so.name ".$query." Order By so.name DESC";
echo 'set ok';
$_SESSION['being_used'] = "SELECT Distinct so.name ".$query;
$_SESSION['field'] = $field;
echo 'set ok';
}
} else {
echo $_SESSION['being_used'];
echo $val;
$search = $_GET['q'];
$field_s = $_SESSION['field'];
$query = $_SESSION['being_used']." Where".$field_s." Like '%".$search."%'";
}
$result = pg_query($query);
while($row = pg_fetch_row($result)){
echo "<tr>";
echo "<td>" . $row[0] . "</td>";
echo "</tr>";
}
}
?>
</table>
</body>
</html>
请不要再查看查询，因为我唯一的问题是SESSION我不知道为什么它会被毁坏。 TIA ppl！