How to update file in PHP and MySQL

Spoke Right / 10 Nov, 2023

PHP uses mysqli query() or mysql_query() function to update records in a MySQL table. This function takes two parameters and returns TRUE on success or FALSE on failure.

Syntax

$mysqli->query($sql,$resultmode)

Example

Try the following example to update a record in a table −

Copy and paste the following example as mysql_example.php −

Updating MySQL Table

connect_errno ) { printf("Connect failed: %s
", $mysqli->connect_error); exit(); } printf('Connected successfully.
'); if ($mysqli->query('UPDATE tutorials_tbl set tutorial_title = "Learning Java" where tutorial_id = 4')) { printf("Table tutorials_tbl updated successfully.
"); } if ($mysqli->errno) { printf("Could not update table: %s
", $mysqli->error); } $sql = "SELECT tutorial_id, tutorial_title, tutorial_author, submission_date FROM tutorials_tbl"; $result = $mysqli->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { printf("Id: %s, Title: %s, Author: %s, Date: %d
", $row["tutorial_id"], $row["tutorial_title"], $row["tutorial_author"], $row["submission_date"]); } } else { printf('No record found.
'); } mysqli_free_result($result); $mysqli->close(); ?>

Output

Access the mysql_example.php deployed on apache web server and verify the output. Here we've entered multiple records in the table before running the select script.

Connected successfully.
Table tutorials_tbl updated successfully.
Id: 1, Title: MySQL Tutorial, Author: Mahesh, Date: 2021
Id: 2, Title: HTML Tutorial, Author: Mahesh, Date: 2021
Id: 3, Title: PHP Tutorial, Author: Mahesh, Date: 2021
Id: 4, Title: Learning Java, Author: Mahesh, Date: 2021
Id: 5, Title: Apache Tutorial, Author: Suresh, Date: 2021