Array in SQL Query?

i have a problem making a SQL Query with an array in my WHERE clause.

For example:

My Array:

$myarray[1] = "hi";
$myarray[2] = "there";
$myarray[3] = "everybody";

My MySQL Statement:

SELECT * FROM myTable WHERE title='".$myarray[]."'

Is there any way to realize that? I solved it myself like this:

for(...) {
$where = $where." title='".$myarray[$count]."' OR ";
}
$where = substr($where , 0, -3);
.....
SELECT * FROM myTable WHERE ".$where."

But if i had thousands of entries in my array, the SQL Statement would be too big and slow, right?

Thanks