What is the statement to delete records in php

Deleting records in php usually uses the SQL DELETE statement. This statement can be used to delete one or more records from the database, and the WHERE clause can also be used to specify the conditions for the records to be deleted.

The following are the detailed steps for deleting records using php:

1. Establish a database connection
First, you need to use the mysqli_connect function to establish a connection to the database. This function needs to be passed into the MySQL server Information. For example, the following is an example of establishing a connection to a local MySQL server:

$link = mysqli_connect("localhost", "root", "password", "mydb");

where localhost is the host name, root and password are the user name and password of the MySQL server, and mydb is the name of the database to be connected.

2. Write SQL statements
The mysqli_query function is usually used to execute SQL statements in PHP. When deleting a record, you need to write an SQL statement like this:

$sql = "DELETE FROM mytable WHERE id=1";

Among them, mytable is the name of the table to be deleted, and id=1 is the condition of the record to be deleted.

3. Execute SQL statement
Pass the SQL statement into the mysqli_query function, you can execute this statement:

$result = mysqli_query($link, $sql);

Among them, $link is the database connection handle, $sql is the SQL statement variable .

4. Close the database connection
Finally, you need to use the mysqli_close function to close the connection with the database:

mysqli_close($link);

The above are the detailed steps for deleting records using PHP. It should be noted that you need to be careful when deleting records because once deleted, the data cannot be recovered. You should also pay attention to preventing attacks such as SQL injection.

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