Not clear exactly what your requirement is, but it would be something like this:

if (faillengthtest($foo)) {
    if (failrepeattest($foo)) {
        #format the page with error msg 1
    } else {
        #format the page with error msg 2
    }
} else {
    #format the page normally
}
[download]

Might be a good idea to wrap your testing in two functions to make the code clearly expressed.

Update:

Actually to exercise all 4 combinations, the code should be (obviously you could tailer some branches, if they don't appear to be a real combination under your requirement):

if (faillengthtest($foo)) {
    if (failrepeattest($foo)) {
        #format the page with error msg 1
    } else {
        #format the page with error msg 2
    }
} else {
    if (failrepeattest($foo)) {
        #format the page with error msg 3
    } else {
        #format the page with normal message
    }
}
[download]