PHP PHP脚本，用于制作MySQL表的备份副本

Posted 2021-05-15

<?php

mysql_connect('localhost', 'test', '123456');
mysql_select_db('test');

if(copy_table('products', 'products_bak')) {
    echo "success\n";
}
else {
    echo "failure\n";
}

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;
}


?>