1-- Hfdk: {keyword}' Order By

These are "comment" markers. They tell the computer to ignore everything else in the original code, effectively silencing any security alarms that were supposed to follow. The "Little Bobby Tables" Legacy

The phrase is a precision tool for a digital lockpicker. {KEYWORD}' ORDER BY 1-- hFdK

This asks the database to sort the results by the first column. If it works, the attacker tries ORDER BY 2 , ORDER BY 3 , and so on. The moment the page crashes, they know exactly how many columns are in your secret database. These are "comment" markers