To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm > -----Original Message----- > From: Tim Burgan [mailto:email@xxxxxxxxxxxxx] > Sent: 19 January 2005 06:19 > > I have a for loop to create a HTML combo box that displays > the 10 year > values, starting from today's year and incrementing until 10 years it > reached. > > The output of the loop to the browser is weird. > If anyone has time, can you please let me know where I screwed up? > > > Here's my loop: > > echo '<select name="expire_year" size="1">'; > > $numbOfYears = 10; > for ( $i = 0; $i < $numbOfYears; $i++ ) > { > echo '<option value="'. $today_year + $i .'"'; . And + have the same precedence, so their order of evaluation is decided by their associativity; according to the table at http://php.net/operators#language.operators.precedence, they are left associative, so the above is interpreted as: echo (('<option value="'. $today_year) + $i) .'"'; > > if ( $_SESSION['createStudent_expireYear'] == $today_year + $i ) > { > echo ' selected="selected"'; > } > > echo '>'. $today_year + $i .'</option>'; And this, similarly, will be: echo (('>'. $today_year) + $i) .'</option>'; Some ways of dealing with this are: (1) explicitly parenthesize the addition: echo '<option value="'. ($today_year + $i) .'"'; (2) use the multiple parameter feature of echo: echo '<option value="', $today_year + $i, '"'; (3) recast the loop to calculate the end year in advance, which avoids having to repeatedly do the addition: $numbOfYears = 10; for ( $y = $today_year, $end_year = $today_year+$numbOfYears; $y < $endYear; $y++ ) { echo '<option value="', $y, '"'; ... etc. Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Headingley Campus, LEEDS, LS6 3QS, United Kingdom Email: m.ford@xxxxxxxxxxxxxx Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
