10个PHP数据库操作函数,让您更好地管理数据库
1. mysqli_connect() - This function is used to establish a connection with the MySQL database server. It accepts four parameters, including server hostname, username, password, and database name.
2. mysqli_select_db() – This function is used to select a database. It accepts two parameters: the database connection and the database name.
3. mysqli_query() – This function is used to execute SQL queries in the database. It returns a result set after executing the query. It accepts two parameters: the database connection and the SQL query.
4. mysqli_fetch_array() – This function is used to return an array of the result set obtained by executing the SQL query. It accepts two parameters: the result set and the type of array to be returned.
5. mysqli_fetch_assoc() – This function is used to return an associative array from the result set obtained by executing the SQL query. It accepts a single parameter – the result set.
6. mysqli_fetch_row() – This function is used to return a numerical array from the result set obtained by executing the SQL query. It accepts a single parameter – the result set.
7. mysqli_num_rows() – This function is used to return the number of rows in the result set obtained by executing the SQL query. It accepts a single parameter – the result set.
8. mysqli_insert_id() – This function is used to return the ID of the last inserted row. It accepts a single parameter – the database connection.
9. mysqli_real_escape_string() – This function is used to escape special characters in a string to prevent SQL injection attacks. It accepts two parameters: the database connection and the string to be escaped.
10. mysqli_close() – This function is used to close the connection with the MySQL database server. It accepts a single parameter – the database connection.
