Php:mysqli "process-oriented" operational database "Connect, build, build, add, delete, change, check, close"

<?php/** * Database operation key function *mysql_connect: Connection data *mysql_error: The last SQL action error message *mysqli_query: Execute SQL statement, delete the check *mysql_select_    DB: Select Database *mysql_fetch_array: Fetch 1 Query records from query results *mysql_close: Close database connection */function println ($msg) {echo "<br>"; echo $msg;} /** Database Configuration */$mysql _server_name = "localhost"; Change to your MySQL database server $mysql_username = "root"; Change to your MySQL database user name $mysql_password = ""; Change to your MySQL database password $mysql_database = "DB2"; Change to your MySQL database name $mysql_table = "Person"; Change to your table name/** * Connect to Database */$con = Mysqli_connect ($mysql _server_name, $mysql _username, $mysql _password); Connect to the database if (! $con) {die (' Could not connect: '. Mysqli_error ($con));} /** * Delete Database: DB2 */$sql _delete_db = "DROP database $mysql _database", if (Mysqli_query ($con, $sql _delete_db)) {println ("$ sql_delete_db OK ");} else {println ("$sql _delete_db failed:". Mysqli_error ($con));} /** * CREATE DATABASE: DB2 */$sql _create_db = "CREATE Database $mysql _database", if (Mysqli_query ($con, $sql _create_db)) {println ( "Create OK");} else {println ("Create failed:". Mysqli_error ($con));} /** * Select database; DB2 */mysqli_select_db ($con, $mysql _database);/** * create data table; Person */$sql _create_table = "CREATE TABLE $mysql _t Able (id int not NULL auto_increment,primary KEY (ID), name varchar (all), age int) "; if (Mysqli_query ($con, $sql _create_table ) {println ("CREATE table OK");} else {println ("CREATE TABLE failed:". Mysqli_error ($con));}    /** * Delete data from table (person), */$sql _delete = "Delete from $mysql _table where age = $"; if (Mysqli_query ($con, $sql _delete)) { println ("Delete table OK");} else {println ("Delete table failed:". Mysqli_error ($con));} /** * Insert new data into the table (person), */$age = rand (12, 80);//randomly spawn age $sql_inset = "INSERT INTO $mysql _table (name,age) value (' Flying_$ag  E ', $age) ", if (Mysqli_query ($con, $sql _inset)) {println (" Insert Table OK "),} else {println (" Insert Table failed: ". Mysqli_error ($con));} /** * Query data from table (person); */$sql _select = "SELECT * from $mysql _table order BY"; $result = Mysqli_query ($con, $sql _select );/** output query result */while ($row = Mysqli_fetch_array ($result)) {println ($row [' ID ']. " " . $row [' name ']. " " . $row [' Age '];} $result->close ();/** * Update table (person) data; */$sql _update = "Update $mysql _table Set age = + where Age <"; $result = Mysqli_query ($con, $sql _update);p rintln ($result), if ($result) {println ("sql_update table OK"),} else {println ("sql _update table failed: ". Mysqli_error ($con));} /** * Close Database connection */mysqli_close ($con);

　　

Php:mysqli "process-oriented" operational database "Connect, build, build, add, delete, change, check, close"