Mysql database operations (version 1127, source code download) _ PHP Tutorial

Mysql database operation class (version 1127, which provides source code download ). The code for downloading and copying Mysql. class. php is as follows :? PhpclassMysql {private $ db_host; host address private $ db_user; user name private $ db_pass; connection password private $ db_name Mysql. class. php download

The code is as follows:

Class Mysql {
Private $ db_host; // host address
Private $ db_user; // User name
Private $ db_pass; // connection password
Private $ db_name; // name
Private $ db_charset; // encoding
Private $ conn;
Public $ debug = false; // The debug switch is disabled by default.
Private $ query_id; // used to determine whether the SQL statement is successfully executed
Private $ result; // result set
Private $ num_rows; // number of rows in the result set, which is only valid for select
Private $ insert_id; // ID generated by the previous INSERT operation
// Constructor/destructor
Function _ construct ($ db_host, $ db_user, $ db_pass, $ db_name, $ db_charset, $ conn ){
$ This-> db_host = $ db_host;
$ This-> db_user = $ db_user;
$ This-> db_pass = $ db_pass;
$ This-> db_name = $ db_name;
$ This-> db_charset = $ db_charset;
$ This-> conn = $ conn;
$ This-> connect ();
}
Function _ destruct (){
@ Mysql_close ($ this-> conn );
}
// Connect to/select a database
Public function connect (){
If ($ this-> conn = 'pconn '){
@ $ This-> conn = mysql_pconnect ($ this-> db_host, $ this-> db_user, $ this-> db_pass );
} Else {
@ $ This-> conn = mysql_connect ($ this-> db_host, $ this-> db_user, $ this-> db_pass );
}
If (! $ This-> conn ){
$ This-> show_error ('database-connection failed: username or password error! ');
}
If (! @ Mysql_select_db ($ this-> db_name, $ this-> conn )){
$ This-> show_error ("database-selection failed: Database $ this-> db_name unavailable ");
}
Mysql_query ("set names $ this-> db_charset ");
Return $ this-> conn;
}
// Query method
Public function query ($ SQL ){
If ($ this-> query_id) $ this-> free_result ();
$ This-> query_id = @ mysql_query ($ SQL, $ this-> conn );
If (! $ This-> query_id) $ this-> show_error ("SQL statement\ "$ SQL \"Execution error ");
Return $ this-> query_id;
}
// Display detailed error information
Public function show_error ($ msg ){
If ($ this-> debug ){
$ Errinfo = mysql_error ();
Echo "Error: $ msg
Return: $ errinfo

";
} Else {
Echo'

An error occurred!

';
}
}
// Obtain the query execution success or failure information
Public function get_query_info ($ info ){
If ($ this-> query_id ){
Echo $ info;
}
}
// Query all
Public function findall ($ table_name ){
$ This-> query ("select * from $ table_name ");
}
// Mysql_fetch_array
Public function fetch_array (){
If ($ this-> query_id ){
$ This-> result = mysql_fetch_array ($ this-> query_id );
Return $ this-> result;
}
}
//......
Public function fetch_assoc (){
If ($ this-> query_id ){
$ This-> result = mysql_fetch_assoc ($ this-> query_id );
Return $ this-> result;
}
}
Public function fetch_row (){
If ($ this-> query_id ){
$ This-> result = mysql_fetch_row ($ this-> query_id );
Return $ this-> result;
}
}
Public function fetch_object (){
If ($ this-> query_id ){
$ This-> result = mysql_fetch_object ($ this-> query_id );
Return $ this-> result;
}
}
// Obtain num_rows
Public function num_rows (){
If ($ this-> query_id ){
$ This-> num_rows = mysql_num_rows ($ this-> query_id );
Return $ this-> num_rows;
}
}
// Obtain insert_id
Public function insert_id (){
Return $ this-> insert_id = mysql_insert_id ();
}
// Display the total number of tables
Public function show_tables (){
$ This-> query ("show tables ");
If ($ this-> query_id ){
Echo "database $ this-> db_name total". $ this-> num_rows ($ this-> query_id). "table
";
$ I = 1;
While ($ row = $ this-> fetch_array ($ this-> query_id )){
Echo "$ I -- $ row [0]
";
$ I ++;
}
}
}
// Display the total number of databases
Public function show_dbs (){
$ This-> query ("show databases ");
If ($ this-> query_id ){
Echo "total databases". $ this-> num_rows ($ this-> query_id )."
";
$ I = 1;
While ($ this-> row = $ this-> fetch_array ($ this-> query_id )){
Echo "$ I --". $ this-> row [Database]."
";
$ I ++;
}
}
}
// Delete database: return the deletion result
Public function drop_db ($ db_name = ''){
If ($ db_name = ''){
$ Db_name = $ this-> db_name; // the current database is deleted by default.
$ This-> query ("drop database $ db_name ");
} Else {
$ This-> query ("drop database $ db_name ");
}
If ($ this-> query_id ){
Return "database $ db_name deleted ";
} Else {
$ This-> show_error ("database $ db_name deletion failed ");
}
}
// Delete a data table: return the deletion result.
Public function drop_table ($ table_name ){
$ This-> query ("drop table $ table_name ");
If ($ this-> query_id ){
Return "the data table $ table_name is successfully deleted ";
} Else {
$ This-> show_error ("An error occurred while deleting the data table $ table_name ");
}
}
// Create a database
Public function create_db ($ db_name ){
$ This-> query ("create database $ db_name ");
If ($ this-> query_id ){
Return "database $ db_name created successfully ";
} Else {
$ This-> show_error ("database $ db_name creation failed ");
}
}
// Obtain the database version
Public function get_info (){
Echo mysql_get_server_info ();
}
// Release the memory
Public function free_result (){
If (@ mysql_free_result ($ this-> query_id ))
Unset ($ this-> result );
$ This-> query_id = 0;
}
} // End class
?>

The http://www.bkjia.com/PHPjc/322615.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/322615.htmlTechArticleMysql.class.php download code is as follows :? Php class Mysql {private $ db_host; // host address private $ db_user; // User name private $ db_pass; // connection password private $ db_name...