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function code_generator(){
$chars="ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
$code_name='';
for ($i=0;$i<5;$i++){
$code_name.=substr($chars, rand(1, strlen($chars))-1,1);
}
return $code_name;
}
function generate (){
$code_name=code_generator().'-'.code_generator().'-'.code_generator().'-'.code_generator().'-'.code_generator();
return $code_name;
}