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edit_book.php
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<?php
session_start();
if(!isset($_SESSION["user"]))
header("Location:index.php");
//connect to database
require_once('db_connect.php');
$flag = 0;
//if edit glyphicon is clicked
if(isset($_GET['edit'])){
$bid = $_GET['edit'];
$query = "SELECT * FROM books WHERE bid='$bid'";
$result = mysqli_query($link,$query);
$row = mysqli_fetch_array($result);
}
//if update is clicked under modify
if (isset($_POST["update"])) {
$bid = $_GET['edit'];
$query = "SELECT * FROM books WHERE bid='$bid'";
$result = mysqli_query($link,$query);
$row = mysqli_fetch_array($result);
//if book name is not NULL
if(trim($_POST["bname"])!=NULL){
$bname=$_POST["bname"];
$query="UPDATE books SET bname='$bname' WHERE bid='$bid'";
$result = mysqli_query($link,$query);
$row['bname'] = $bname;
$flag++;
}
//if author name is not NULL
if(trim($_POST["author"])!=NULL){
$bauthor = $_POST["author"];
$query="UPDATE books SET author='$bauthor' WHERE bid='$bid'";
$result = mysqli_query($link,$query);
$row['author'] = $bauthor;
$flag++;
}
if($flag){
$msg = "Book details successfully updated !!";
echo '<div class="alert alert-success alert-dismissable fade in" style="position:absolute;margin-top:355px;margin-left:410px;width:350px;">
<a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>' . $msg . '</div>';
}
else if(!$flag){
$msg = "No input to update !!";
echo '<div class="alert alert-danger alert-dismissable fade in" style="position:absolute;margin-top:355px;margin-left:410px;width:350px;">
<a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>' . $msg . '</div>';
}
unset($_POST);
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="shortcut icon" type="image/png" href="Images/favicon.png">
<title>Modify</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="CSS/style.css">
<script type="text/javascript" src="JS/script.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row"><!--start of row-->
<div class="col-md-3">
<div class="row"><!--nested row starts-->
<div class="col-md-3" align="center" style="background-color:#1A1927;position:fixed"><!--libromate logo-->
<a href="dashboard.php"><img src="Images/logo.png" style="height:100px;"></a>
</div>
<div id="dashboard_left_col" style="padding-top:100px"><!--start of vertical navbar-->
<ul>
<br>
<p>MENU</p>
<li><a href="dashboard.php">
<span class="glyphicon glyphicon-home"></span> Dashboard</a>
</li>
<li><a href="profile.php">
<span class="glyphicon glyphicon-user"></span> Profile</a>
</li>
<br>
<p>BOOKS</p>
<li><a href="add.php">
<span class="glyphicon glyphicon-plus"></span> Add</a>
</li>
<li><a href="modify.php">
<span class="glyphicon glyphicon-edit"></span> Modify</a>
</li>
<li><a href="browse.php">
<span class="glyphicon glyphicon-eye-open"></span> Browse all</a>
</li>
<br>
<p>STATUS</p>
<li><a href="borrow.php">
<span class="glyphicon glyphicon-hourglass"></span> Borrowed
<?php
if($borrow!=0) {
echo "<span class='badge'>$borrow</span>";
}
?>
</a>
</li>
<li><a href="lent.php">
<span class="glyphicon glyphicon-book"></span> Lent
<?php
if($lent!=0) {
echo "<span class='badge'>$lent</span>";
}
?>
</a>
</li>
<br>
<p>SESSION</p>
<li><a href="logout.php">
<span class="glyphicon glyphicon-log-out"></span> Logout</a>
</li>
<li><a href="trash.php">
<span class="glyphicon glyphicon-trash"></span> Trash</a>
</li>
</ul>
</div><!--end of vertical navbar-->
</div><!--end of nested row-->
</div><!--end of col-md-3-->
<?php
include "topnav.php";
?>
<div class="container-fluid">
<br>
<div style="font-size:30px;padding-left: 70px">Enter Book Details</div>
<br>
<div class="container" style="padding-left: 70px">
<form action="edit_book.php?edit=<?php echo $row['bid']; ?>" method="post">
<!--display book id-->
<div class="input-group">
<span class="input-group-addon" style="width: 100px;">Book ID</span>
<input type="text" disabled="disabled" class="form-control" style="width:250px;" name="bid" placeholder="<?php echo $row['bid']; ?>">
</div>
<!--edit book name-->
<div class="input-group">
<span class="input-group-addon" style="width: 100px;">Book Name</span>
<input type="text" class="form-control" style="width:250px;" name="bname" placeholder="<?php echo $row['bname']; ?>">
</div>
<!--edit author name-->
<div class="input-group">
<span class="input-group-addon" style="width: 100px;">Author</span>
<input type="text" class="form-control" style="width:250px;" name="author" placeholder="<?php echo $row['author']; ?>">
</div>
<br>
<div style="float: left; width: 170px">
<input class="btn btn-block btn-primary" type="submit" name="update" value="Update">
</div>
<div style="float: right; width: 170px;margin-right:735px;">
<input class="btn btn-block btn-primary" type="button" name="cancel" value="Cancel" onclick="javascript:history.back();">
</div>
</form><!--end of form-->
</div><!--end of container-->
</div>
</div>
</div><!--end of col-md-9-->
</div><!--end of row-->
</div><!--end of container fluid-->
</body>
</html>