In this tutorial, I will explain how to read, edit, and delete data from a database using PHP statement. I already told how data is entered in the database using PHP Ready statement.
After submitting the edited form data, the prepared statement is created for the updatequery. The PHP code sets the value to the update query params and executes it using the prepared statement object. After updating the database row, it reads the latest data and populates in the editform fields.
Structure for User Table
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CREATE TABLE IF NOT EXISTS `user` ( `id` int(11) NOT NULL, `name` varchar(255) NOT NULL, `email` varchar(255) NOT NULL, `contactno` int(11) NOT NULL, `addrss` longtext NOT NULL, `posting_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; |
Database Connection File(Config.php). Include this file in every page.
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<?php $dbuser="root"; $dbpass=""; $host="localhost"; $dbname = "test"; $mysqli = new mysqli($host, $dbuser, $dbpass, $dbname); ?> |
Code for read data from database using PHP Prepared Statement(index.php)
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<html> <title>Prepared Statement</title> <body> <h3>Fetch, Edit and Delete Data from Database using PHP Preopared Statement</h3> <table border="1"> <tr> <td><b>Sn.</b></td> <td><b>Name</b></td> <td><b>Contact no.</b></td> <td><b>Email-id :</b></td> <td><b>Adress</b></td> <td><b>Reg Date</b></td> <td><b>Action</b></td> </tr> <?php //code for read data from Database $ret = "select * from user"; $stmt2 = $mysqli->prepare($ret); $stmt2->execute(); $res=$stmt2->get_result(); $cnt=1; while($row=$res->fetch_object()) { ?> <tr> <td><?php echo $cnt;?></td> <td><?php echo $row->name;?></td> <td><?php echo $row->email;?></td> <td><?php echo $row->contactno;?></td> <td><?php echo $row->addrss;?></td> <td><?php echo $row->posting_date;?></td> <td><a href="edit.php?id=<?php echo $row->id;?>">Edit</a> |<a href="index.php?del=<?php echo $row->id;?>"> Delete</a></td> </tr> <?php $cnt=$cnt+1; } ?> </table> </body> </html> |
Code for Delete a Record from Database
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if(isset($_GET['del'])) { $id=intval($_GET['del']); $adn="delete from user where id=?"; $stmt= $mysqli->prepare($adn); $stmt->bind_param(i,$id); $rs=$stmt->execute(); if(rs==true) { echo "<script>alert('User has been successfully Deleted');</script>"; header('location:index.php'); } } |
Put this code at the top of the index.php
Code for edit the data(edit.php). For editing the code first we have to create a html form. After creating HTML form fetch the data from database inside form fields(previous data).
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<html> <title>Prepared statement</title> <body> <h2>Edit Data using PHP Prepared Statement</h2> <?php $id=$_GET['id']; $ret = "select * from user where id=?"; $stmt2 = $mysqli->prepare($ret); $stmt2->bind_param('i',$id); $stmt2->execute(); $res=$stmt2->get_result(); $cnt=1; while($row=$res->fetch_object()) { ?> <tr> <form name="stmt" method="post"> <table> <tr> <td>Name :</td> <td><input type="text" name="name" value="<?php echo $row->name;?>" required="required" /> </td> </tr> <tr> <td>Email :</td> <td><input type="email" name="email" value="<?php echo $row->email;?>" required="required" /></td> </tr> <tr> <td>Contact no. :</td> <td><input type="text" name="contact" value="<?php echo $row->contactno; ?>" required="required" /></td> </tr> <tr> <td>Address :</td> <td><textarea name="addrss" cols="30" rows="4" required="required"><?php echo $row->addrss; ?></textarea></td> </tr> <tr> <td></td> <td><input type="submit" name="update" value="Submit" /></td> </tr> </table> </form> <?php } ?> </body> </html> |
Code for edit the Data. Put this code at the top of the edit.php
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if(isset($_POST['update'])) { $name=$_POST['name']; $email=$_POST['email']; $contact=$_POST['contact']; $addrss=$_POST['addrss']; $uid=$_GET['id']; $ad="update user set name=?,email=?,contactno=?,addrss=? where id=?"; $stmt= $mysqli->prepare($ad); $stmt->bind_param('ssisi',$name,$email,$contact,$addrss,$uid); $stmt->execute(); // $newId = $stmtins->insert_id; $stmt->close(); echo "<script>alert('Data updated Successfully');</script>" ; |
