Often you'd want to execute a statement if a certain condition is met, and a different statement if the condition is not met. This is what else is for. else extends an if statement to execute a statement in case the expression in the if statement evaluates to FALSE . For example, the following code would display a is bigger than b if $a is bigger than $b, and a is NOT bigger than b otherwise:
<?php
if ( $a > $b ) {
echo "a is bigger than b" ;
} else {
echo "a is NOT bigger than b" ;
}
?> © 2005-2008 BlaBla.cn 版权所有