[RESOLVED] PHP While....Loop - Help Needed

[modpluz]

hi guyz, i have this question like;

In ASP there is something like

Do While arg

some more codes...

Loop

what that does in ASP/VB is that it loops until the argument is false

and i thought it should be doing the same thing with PHP's while function

but it doesn't instead it loops forever.

take this code for example;

'Note that this is an ASP Code
strPost = "[EDIT]C:\Program Files\bpmp\htdocs\smat_3.jpg[/EDIT]"
Do While InStr(1, strPost, "[EDITED]", 1) > 0 AND InStr(1, strPost, "[/EDITED]", 1) > 0

'some more codes...

Loop

but if i try that in PHP using the While....Loop then it loops for ever

pls note the function InStr() function,this is used to check if a given string occurs in another string and also it returns the position where the occurence starts and i have a similar php function that does that.
here it is.

function InStr($string,$find,$CaseSensitive = false) {
        $i=0;
        while (strlen($string)>=$i) {
            unset($substring);
            if ($CaseSensitive) {
                $find=strtolower($find);
                $string=strtolower($string);
            }
            $substring=substr($string,$i,strlen($find));
            if ($substring==$find) return $i;
            $i++;
        }
        return -1;
    }