我正在为我的公司创建一个webapp，我的一个PHP页面一直在继续 当我向其中添加另一个header.php时加载，但是如果我添加此标头，则另一页加载良好。
我的代码：本节添加到下面的页面（view_enquiry.php）
head.php：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- Tell the browser to be responsive to screen width -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<!-- Favicon icon -->
<link rel="icon" type="image/png" sizes="16x16" href="images/logo.png">
<?php
include('connect.php');
$sql_head_title = "select * from manage_website";
$result_head_title = $conn->query($sql_head_title);
$row_head_title = mysqli_fetch_array($result_head_title);
?>
<title><?php echo $row_head_title['title'];?></title>
<link href="css/lib/chartist/chartist.min.css" rel="stylesheet">
<link href="css/lib/owl.carousel.min.css" rel="stylesheet" />
<link href="css/lib/owl.theme.default.min.css" rel="stylesheet" />
<!-- Bootstrap Core CSS -->
<link href="css/lib/bootstrap/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="css/helper.css" rel="stylesheet">
<link href="css/snackbar.css" rel="stylesheet">
<link href="css/modal.css" rel="stylesheet">
<link href="css/style.css" rel="stylesheet">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:** -->
<!--[if lt IE 9]>
<script src="https:**oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https:**oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
<link rel="stylesheet" href="css/lib/html5-editor/bootstrap-wysihtml5.css" />
<link href="css/lib/calendar2/semantic.ui.min.css" rel="stylesheet">
<link href="css/lib/calendar2/pignose.calendar.min.css" rel="stylesheet">
</head>
<body class="fix-header fix-sidebar">
<!-- Preloader - style you can find in spinners.css -->
<div class="preloader">
<svg class="circular" viewBox="25 25 50 50">
<circle class="path" cx="50" cy="50" r="20" fill="none" stroke-width="2" stroke-miterlimit="10" /> </svg>
</div>
</body>
</html>
这是我的页面，该页面不断加载（view_enquiry.php）
<?php include('head.php');?>
<?php include('header.php');?>
<?php include('sidebar.php');?>
<?php
include ('connect.php');
?>
<div class="content-wrapper" style="padding-top: 48px;">
<div class="container-fluid">
<div class="status" style="color:red;position: relative;top:215px;positin: relative;left:565px;position:absolute;">
<h4>Status Updated Successfully</h4>
</div>
<div class="row" col-sm color: #031aaf" style="padding-top: 12px;">
<div class="col-sm-3">
<h3 style="color: #828282"><b>Enquiry Details</b></h3>
</div>
<div class="col-sm-3">
<form action="" method="get" " >
<input name="search" type="text" placeholder="Search(Name/number)" size="20px">
<button type="submit" name="submit" value="search" class="button"><i class="fa fa-search"></i></button>
</form>
</div>
<div class="col-sm-5" style="text-align: left;">
<form action="between.php" method="GET" >
<input type="date" name="from" required> To
<input type="date" name="to" required>
<button type="submit" class="button"><i class="fa fa-search"></i></button>
</form>
</div>
</div>
<b><p style="text-align:right; color: #828282" > Yesterday's Enquiry Count :
<?php
$v="SELECT COUNT(id) FROM task WHERE (`date` = CURDATE() - INTERVAL 1 DAY)AND completed=0" ;
$s=mysqli_query($conn,$v);
$w=mysqli_fetch_assoc($s);
echo $w['COUNT(id)'] ;
?>
</b>
<br><br>
<table border="1px;" style="margin-top:-11px;color: #333333" bgcolor="#fcb983" >
<tr style="color: black">
<th></th>
<th>Name</th>
<th>Address</th>
<th>Enquiry Date</th>
<th>Category/Work</th>
<th>Followup Date</th>
<th>Mobile</th>
<th>Comment</th>
<th>Postponed To</th>
<th>Edit</th>
<th>Delete</th>
<th>Complete</th>
</tr>
<?php
if(@$_GET['search'] && @$_GET['search']!=''){
$query=$_GET['search'];
$query = htmlspecialchars($query);
$vari = mysqli_query($conn,"SELECT * FROM task WHERE completed=0 AND ((`task_name` LIKE '%".$query."%') OR (`mobile` LIKE '%".$query."%') OR (`address` LIKE '%".$query."%') OR (`work` LIKE '%".$query."%') OR (`command` LIKE '%".$query."%'))") or die(mysqli_error($con));
//$vari="SELECT * FROM task WHERE completed=0 AND (task_name='$s' OR mobile='$s')";
}
else{
$vari = mysqli_query($conn,"SELECT * FROM task WHERE (`date` = CURDATE() - INTERVAL 1 DAY) AND completed=0") or die(mysqli_error($conn));
//$vari="SELECT * FROM task WHERE completed=0";
}
//$variable=mysqli_query($con,$vari);
while ($row = mysqli_fetch_array($vari)){
?>
<tr>
<td><span class="glyphicon glyphicon-chevron-right"></span></td>
<td><?php echo $row["task_name"]; ?></td>
<td><?php echo $row["address"]; ?></td>
<td><?php echo date('d-m-Y',strtotime($row["date"])); ?></td>
<td><?php echo $row["work"];?></td>
<td><?php echo date('D - d-m-Y',strtotime($row["todo"])); ?></td>
<td><?php echo $row["mobile"] ;?></td>
<td><?php echo $row["command"];?></td>
<td><a href='postponed.php?postpo=<?php echo $row["id"]; ?>'><center><span class="fa fa-share"></span></center></a></td>
<td><a href='enqedit.php?edit=<?php echo $row["id"]; ?>'><center><span class="fa fa-pencil"></span></center></a></td>
<td><a href='enqdelete.php?delete=<?php echo $row["id"]; ?>' onclick="return confirm('Are you sure you want to delete this item?');"><center><span class="fa fa-trash"></span></center></a></td>
<td><a href="bill.php?id=<?php echo $row["id"]; ?>"><center><span class="fa fa-check-square"></span></center></a></td>
</tr>
<?php } ?>
</table>
</div>
</div>
请帮助我这个细节