ThePersonal modification to meet my need.

[Nobody/Anonymous]

file:function.inc.php
Line 421 add:
// UTF8 support
$res=mysql_query("set CHARACTER SET utf8");
Line 447 modify:
// Remove view, avoid view export problem.
$res=mysql_query("show table status where Comment != 'VIEW'");
After
$out.="USE `".$db."`;\n";
add:
// Avoid constraints check problem
            $out.="SET FOREIGN_KEY_CHECKS=0;\n";
            $out.="SET AUTOCOMMIT=0;\n";
            $out.="START TRANSACTION;";
Before
        // an error occurred! Try to delete file and return error status
add:
// Avoid constraints check problem
            $out .= "\nSET FOREIGN_KEY_CHECKS=1;\n";
            $out .= "\nCOMMIT;\n";

[Nobody/Anonymous]

negative, no data in the exported sql file, what's wrong with it?