php mysql_query returns empty value

I created a directory listing and came across this issue.

What value does mysql_query($query1) return if there is no value?

My script received this message from $result, would it be alright to pass array(0)开发者_如何学C?

Warning: mysql_fetch_array($result) expects parameter 1 to be resource, array given in 

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try:

mysql_query($query1) or die(mysql_error());

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php.net

For SELECT, SHOW, DESCRIBE, EXPLAIN and other statements returning resultset, mysql_query() returns a resource on success, or FALSE on error

If it doesn't return FALSE, you can use mysql_num_rows to find out just how many rows were returned.