How to add update, delete and view button in my php rows - php

Question

I want to add "update", "delete" and "view" in the other page button in the right side of the table rows of my php table. Please help me to add it. Here is my code:
<?php
$conn = mysqli_connect('localhost','root','','dbname');
if(mysqli_connect_errno()){
echo 'Failed to connect: '.mysqli_connect_error();
}
$query = "SELECT * FROM table";
$results = mysqli_query($conn,$results);
echo '<table border="1">';
echo '<tr>';
echo "<th>Firstname</th>";
echo "<th>Lastname</th>";
echo '</tr>';
while($row=mysqli_fetch_array($results)){
echo '<tr>';
echo '<td>'.$row['Firstname'].'</td>';
echo '<td>'.$row['Lastname'].'</td>';
echo '</tr>';
}
echo '</table>';
mysqli_close($conn);
?>

Answer 1

echo '<tr>';
echo "<th>Firstname</th>";
echo "<th>Lastname</th>";
echo "<th>Actions</th>";
echo '</tr>';
while($row=mysqli_fetch_array($results)){
echo '<tr>';
echo '<td>'.$row['Firstname'].'</td>';
echo '<td>'.$row['Lastname'].'</td>';
echo "<td>
Update
Delete
View
</td>";
echo '</tr>';
}
echo '</table>';
You should use jquery/Ajax for delete. It is better option.
For delete write this function: Need to add min jquery file
<script src="js/jquery-1.7.1.min.js"></script>
<script>
function deleteRow(id)
{
$.ajax({
url: 'delete.php',
type: "POST",
data: {
'id' : id,
},
success : function(response) {
alert('Record deleted');
},
error : function() {
},
complete : function() {
}
});
}
</script>
write your delete record code in 'delete.php'.
This is one option. You can do this in more good and specific way. Everything to say here is not possible for me.
for view you can do this in two ways.
1) If you want to display in same format, redirect it on self page and put condition like.
if(isset($_POST['id'])
{
$id = $_POST['id'];
$query = "SELECT * FROM table where id=$id";
}
else
{
$query = "SELECT * FROM table";
}
2) If you want in different format, Do same thing in view.php select only that record.
One simple thing i want to ask what is the need for view? when it is already in table above.
For Update write in your update.php :
if(isset($_POST['id'])
{
$id = $_POST['id'];
$query = "SELECT * FROM table where id=$id";
}
and set form action
<form method="post" action="<?php echo esc_url($_SERVER['PHP_SELF']); ?>">
fetch value of above result in input box like and also fetch id as hiiden field:
<input type='text' name='firstname' value='<?php echo $row['firstname']; ?>
<input type='hidden' name='id' value='<?php echo $row['id']; ?>
and for update you can go like:
if(isset($_POST['firstname'] && isset($_POST['lastname'] ) // Here you can use your any required field
{
//Your update logic go here like:
$id = $_POST['id'];
$query = "UPDATE table SET firstname=$_POST['firstname'] where id=$id"; // Your whole update query.
}

Answer 2

i see some mistake in your code:
$query = "SELECT * FROM table";
$results = mysqli_query($conn,$results);
should be:
$query = "SELECT * FROM table";
$results = mysqli_query($conn,$query);
try this
echo '<table border="1">';
echo '<tr>';
echo "<th>Firstname</th>";
echo "<th>Lastname</th>";
echo "<th></th>";
echo '</tr>';
while($row=mysqli_fetch_array($results)){
echo '<tr>';
echo '<td>'.$row['Firstname'].'</td>';
echo '<td>'.$row['Lastname'].'</td>';
echo "<td>
<input type='submit' value='update'>
<input type='submit' value='delete'>
<input type='submit' value='view'>
</td>";
echo '</tr>';
}
echo '</table>';

Answer 3

Try this functions:
<?php
Class Db {
protected $connection;
public function __construct() {
$this->connection = $connection;
}
function insert($table,array $data) {
$fields = '';$values = '';
foreach($data as $col => $value) {
$fields.= $col.",";
}
foreach($data as $col => $value) {
$values.= "'".replace_str($value)."',";
}
$fields = substr($fields,0,-1);
$values = substr($values,0,-1);
if(!$query = mysqli_query($this->connection,"insert into ".$table."(".$fields.") values(".$values.")")) {
HandleDBError("Error inserting data to the table\query:$query");
}
return $query;
}
function update($table, array $data, $where) {
$fields = '';$values = '';
foreach($data as $col => $value) {
$values.= $col."='".replace_str($value)."',";
}
$values = substr($values,0,-1);
if(!$query = mysqli_query($this->connection,"update ".$table." set ".$values." where ".$where)) {
HandleDBError("Error updating data to the table\query:$query");
}
return $query;
}
function delete($table, $where = '') {
if ($where)
return mysqli_query($this->connection,"delete from ".$table." where ".$where);
return mysqli_query($this->connection,"delete from ".$table);
}
function get($strQuery) {
if(!$query = mysqli_query($this->connection,$strQuery)) {
HandleDBError("Error inserting data to the table\query:$query");
}
$data = [];
while($row = mysqli_fetch_assoc($query)) {
$data[] = $row;
}
return $data;
}
}
?>