Description:
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Prepare crashes inside a function or inside a class function. The same statment works outside the function.

Reproduce code:
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$db = new PDO('mysql:dbname=DATABASE;host=HOST', 'USER', 'PASS');
$db_stmnt = $db->prepare('INSERT INTO table(start_date, end_date, title) VALUES (?,?,?)');
print_r($db_stmnt);
exit();

Expected result:
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PDO Object ( ) PDOStatement Object ( [queryString] => INSERT INTO table(start_date, end_date, title) VALUES (?,?,?) ) 

Actual result:
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When in in a function apache crashes and prompts to download the script file. Outside the function you get the expected results.