for loop

[Anon]

hi,
i would like the user to select the time from 0700 to 1800 from the combo box.the time have an interval of 30 minutes.i try to use a for loop to loop the time and display it,but it couldn't work.

<select name=timeid>
<?
for($i=0700;$i<=1800;$i+30){
?>
<option value=<?echo $i?>><?echo $i?>
<?
}
?>
</select>

i using the above code,but it give me two error.first it cannot start with 0700 and second it will not increament $i by 30 and a fatal error saying Maximum execution time of 30 seconds exceeded in the loop.
why is this so???is my loop have any problem???how can i allow user to select time???

thanks for the help...

[Anon]

The reason it is complaining about 0700 is that you are using an octal notation. See the manual, Chapter 6, types.

For what you are trying to do, take a look at the printf manual page.

If you want to increment $i by 30, the syntax is $i = $i+30.

[Anon]

You're not going to get the sequence you want, even if you fix

&nbsp;&nbsp;$i + 30

to say

&nbsp;&nbsp$i += 30

because the numbers are <i>decimal</i>. You will create the sequence 700, 730, 760, 790, ... which is not what you want. Instead, use real timestamp
variables: you can create one with mktime(), and format it with date().