Friday, March 17, 2017

add edit display in php

Add update and display

 Config.php

<?php
$databaseHost = 'localhost';
$databaseName = 'test';
$databaseUsername = 'root';
$databasePassword = 'root';
 
$mysqli = mysqli_connect($databaseHost, $databaseUsername, $databasePassword, $databaseName); 
?>

ADD.HTML
<html>
<head>
    <title>Add Data</title>
</head>

<body>
    <a href="index.php">Home</a>
    <br/><br/>

    <form action="add.php" method="post" name="form1">
        <table width="25%" border="0">
            <tr>
                <td>Name</td>
                <td><input type="text" name="name"></td>
            </tr>
            <tr>
                <td>Age</td>
                <td><input type="text" name="age"></td>
            </tr>
            <tr>
                <td>Email</td>
                <td><input type="text" name="email"></td>
            </tr>
            <tr>
                <td></td>
                <td><input type="submit" name="Submit" value="Add"></td>
            </tr>
        </table>
    </form>
</body>
</html>

Add.php


<html>
<head>
    <title>Add Data</title>
</head>

<body>
<?php
//including the database connection file
include_once("config.php");

if(isset($_POST['Submit'])) {  
    $name = $_POST['name'];
    $age = $_POST['age'];
    $email = $_POST['email'];
       
    // checking empty fields
    if(empty($name) || empty($age) || empty($email)) {              
        if(empty($name)) {
            echo "<font color='red'>Name field is empty.</font><br/>";
        }
       
        if(empty($age)) {
            echo "<font color='red'>Age field is empty.</font><br/>";
        }
       
        if(empty($email)) {
            echo "<font color='red'>Email field is empty.</font><br/>";
        }
       
        //link to the previous page
        echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
    } else {
        // if all the fields are filled (not empty)            
        //insert data to database
        $result = mysqli_query($mysqli, "INSERT INTO users(name,age,email) VALUES('$name','$age','$email')");
       
        //display success message
        echo "<font color='green'>Data added successfully.";
        echo "<br/><a href='index.php'>View Result</a>";
    }
}
?>
</body>
</html>


 EDIT.php


<?php
// including the database connection file
include_once("config.php");

if(isset($_POST['update']))
{  
    $id = $_POST['id'];
   
    $name=$_POST['name'];
    $age=$_POST['age'];
    $email=$_POST['email'];  
   
    // checking empty fields
    if(empty($name) || empty($age) || empty($email)) {          
        if(empty($name)) {
            echo "<font color='red'>Name field is empty.</font><br/>";
        }
       
        if(empty($age)) {
            echo "<font color='red'>Age field is empty.</font><br/>";
        }
       
        if(empty($email)) {
            echo "<font color='red'>Email field is empty.</font><br/>";
        }      
    } else {  
        //updating the table
        $result = mysqli_query($mysqli, "UPDATE users SET name='$name',age='$age',email='$email' WHERE id=$id");
       
        //redirectig to the display page. In our case, it is index.php
        header("Location: index.php");
    }
}
?>


<?php
//getting id from url
$id = $_GET['id'];

//selecting data associated with this particular id
$result = mysqli_query($mysqli, "SELECT * FROM users WHERE id=$id");

while($res = mysqli_fetch_array($result))
{
    $name = $res['name'];
    $age = $res['age'];
    $email = $res['email'];
}
?>
<html>
<head>  
    <title>Edit Data</title>
</head>

<body>
    <a href="index.php">Home</a>
    <br/><br/>
   
    <form name="form1" method="post" action="edit.php">
        <table border="0">
            <tr>
                <td>Name</td>
                <td><input type="text" name="name" value="<?php echo $name;?>"></td>
            </tr>
            <tr>
                <td>Age</td>
                <td><input type="text" name="age" value="<?php echo $age;?>"></td>
            </tr>
            <tr>
                <td>Email</td>
                <td><input type="text" name="email" value="<?php echo $email;?>"></td>
            </tr>
            <tr>
                <td><input type="hidden" name="id" value=<?php echo $_GET['id'];?>></td>
                <td><input type="submit" name="update" value="Update"></td>
            </tr>
        </table>
    </form>
</body>
</html>


INDEX.PHP
<?php
//including the database connection file
include_once("config.php");

//fetching data in descending order (lastest entry first)
//$result = mysql_query("SELECT * FROM users ORDER BY id DESC"); // mysql_query is deprecated
$result = mysqli_query($mysqli, "SELECT * FROM users ORDER BY id DESC"); // using mysqli_query instead
?>

<html>
<head>    
    <title>Homepage</title>
</head>

<body>
    <a href="add.html">Add New Data</a><br/><br/>

    <table width='80%' border=0>
        <tr bgcolor='#CCCCCC'>
            <td>Name</td>
            <td>Age</td>
            <td>Email</td>
            <td>Update</td>
        </tr>
        <?php 
        //while($res = mysql_fetch_array($result)) { // mysql_fetch_array is deprecated, we need to use mysqli_fetch_array 
        while($res = mysqli_fetch_array($result)) {         
            echo "<tr>";
            echo "<td>".$res['name']."</td>";
            echo "<td>".$res['age']."</td>";
            echo "<td>".$res['email']."</td>";    
            echo "<td><a href=\"edit.php?id=$res[id]\">Edit</a></td></tr>";        
        }
        ?>
    </table>
</body>

</html>
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