PHP脚本，用于创建MySQL表的备份副本

Posted 2021-02-25

The script below connects to a mysql database server on "localhost" using the login name "test" and password "123456" and then connects to the database "test". It then copies the table structure and data from the table "products" to a new table "products_bak". If the target table already exists the function returns false.

<?php
 
mysql_connect('localhost', 'test', '123456');
mysql_select_db('test');
 
if(copy_table('products', 'products_bak')) {
    echo "success
";
}
else {
    echo "failure
";
}
 
function copy_table($from, $to) {
 
    if(table_exists($to)) {
        $success = false;
    }
    else {
        mysql_query("CREATE TABLE $to LIKE $from");
        mysql_query("INSERT INTO $to SELECT * FROM $from");
        $success = true;
    }
 
    return $success;
 
}
 
function table_exists($tablename, $database = false) {
 
    if(!$database) {
        $res = mysql_query("SELECT DATABASE()");
        $database = mysql_result($res, 0);
    }
 
    $res = mysql_query("
        SELECT COUNT(*) AS count
        FROM information_schema.tables
        WHERE table_schema = '$database'
        AND table_name = '$tablename'
    ");
 
    return mysql_result($res, 0) == 1;
}
 
 
?>