Answers for "how to update data in php using form"

PHP
1

php update sql database from form

<?php

include "config.php"; // Using database connection file here

$id = $_GET['id']; // get id through query string

$qry = mysqli_query($db,"select * from emp where id='$id'"); // select query

$data = mysqli_fetch_array($qry); // fetch data

if(isset($_POST['update'])) // when click on Update button
{
    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
	
    $edit = mysqli_query($db,"update emp set fname='$fname', lname='$lname' where id='$id'");
	
    if($edit)
    {
        mysqli_close($db); // Close connection
        header("location:all_records.php"); // redirects to all records page
        exit;
    }
    else
    {
        echo mysqli_error();
    }    	
}
?>

<h3>Update Data</h3>

<form method="POST">
  <input type="text" name="fname" value="<?php echo $data['fname'] ?>" placeholder="Enter Full Name" Required>
  <input type="text" name="lname" value="<?php echo $data['lname'] ?>" placeholder="Enter Last Name" Required>
  <input type="submit" name="update" value="Update">
</form>
Posted by: Guest on August-25-2021
1

mysqli procedural UPDATE

if ($db->query("UPDATE contact SET lastname='Doe' WHERE id=2") === TRUE) {
  echo "Record updated successfully";
} else {
  echo "Error updating record";
}
Posted by: Guest on July-27-2020
2

live update mysql data in php

$(document).ready(function(){    
    loadstation();
});

function loadstation(){
    $("#station_data").load("station.php");
    setTimeout(loadstation, 2000);
}
Posted by: Guest on August-22-2020
3

MySQL UPDATE

The UPDATE statement updates data in a table. It allows you to change the values in one or more columns of a single row or multiple rows.

The following illustrates the basic syntax of the UPDATE statement:

UPDATE [LOW_PRIORITY] [IGNORE] table_name 
SET 
    column_name1 = expr1,
    column_name2 = expr2,
    ...
[WHERE
    condition];
In this syntax:

First, specify the name of the table that you want to update data after the UPDATE keyword.
Second, specify which column you want to update and the new value in the SET clause. To update values in multiple columns, you use a list of comma-separated assignments by supplying a value in each column’s assignment in the form of a literal value, an expression, or a subquery.
Third, specify which rows to be updated using a condition in the WHERE clause. The WHERE clause is optional. If you omit it, the UPDATE statement will modify all rows in the table.
Posted by: Guest on October-19-2020

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