PHP MySQL Update
The UPDATE statement is used to modify data in the database table.
Update data in the database
The UPDATE statement is used to update existing records in the database table.
Syntax
UPDATE table_name SET column1=value, column2=value2,... WHERE some_column=some_valueNotes: Please note the WHERE clause in UPDATE syntax. The WHERE clause specifies which records need to be updated. If you want to leave out the WHERE clause, all records will be updated!
To learn more about SQL, visit our SQL Tutorial.
In order for PHP to execute the above statement, we must use the mysqli_query() function. This function is used to send a query or command to the MySQL connection.
Example
In the previous chapters of this tutorial, we created a table named "Persons" as shown below:
| FirstName | LastName | Age |
|---|---|---|
| Peter | Griffin | 35 |
| Glenn | Quagmire | 33 |
The following example updates some data in the "Persons" table:
<?php
$con=mysqli_connect("localhost","username","password","database");
// 检测连接
if (mysqli_connect_errno())
{
echo "连接失败: " . mysqli_connect_error();
}
mysqli_query($con,"UPDATE Persons SET Age=36
WHERE FirstName='Peter' AND LastName='Griffin'");
mysqli_close($con);
?>After this update, the "Persons" table looks like this: | LastName | Age | |
|---|---|---|
| #Griffin | 36 | |
| Quagmire | 33 |
Related video tutorial recommendation: "mysql tutorial"http: //www.php.cn/course/list/51.html
