PHP dynamic page in the IE kernel browser under the overall bias to the left of the solution

Today I found a strange problem, the static page in the local preview, the browser under the normal display. But when the dynamic page becomes PHP, the discovery page is shifted to the left of the IE kernel's browser.
Made a big day also did not find any reason, delayed the others 2 programmers large half-day time, also blame embarrassed. Later, continue to look for, finally found the reason, originally those two guys wrote the note in the <! On top of the DOCTYPE, delete the annotation or change it to another place.