How to implement mysql updates in php

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Php to achieve mysql update methods: 1, create a PHP sample file; 2, connect mysql;3, through the "mysqli_query ($con," UPDATE Persons SET Age=36 WHERE FirstName=...) statement to achieve update.

This article operating environment: Windows7 system, PHP7.4 version, Dell G3 computer.

PHP MySQL Update

The UPDATE statement is used to modify data in a database table.

Update the data in the database

The UPDATE statement is used to update records that already exist in the database table.

Grammar

UPDATE table_nameSET column1=value, column2=value2,...WHERE some_column=some_value

Note: please note the WHERE clause in the UPDATE syntax. The WHERE clause specifies which records need to be updated. If you want to omit the WHERE clause, all records will be updated!

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 a MySQL connection.

Example

In the previous chapters of this tutorial, we created a table called "Persons" as follows:

FirstNameLastNameAgePeterGriffin35GlennQuagmire33

The following example updates some data in the "Persons" table:

Example