The symbol for the ternary operator is ? .
The ternary operator uses three expressions:
( expression1 ) ? expression2 : expression3;
The ternary operator is a compact version of the if...else construct.
The preceding code reads as follows:
If expression1 evaluates to true , the overall expression equals expression2 ; otherwise, the overall expression equals expression3 .
<?php $widgets = 23;/* ww w . j a v a2 s . c o m*/ $plenty = "plenty"; $few = "Less than 10 left."; echo ( $widgets >= 10 ) ? $plenty : $few; ?>
Three variables are created: the $widgets variable, with a value of 23.
Two variables, $plenty and $few , to hold text strings to display to the user.
Finally, the ternary operator is used to display the appropriate message.
The expression $widgets >= 10 is tested; if it's true, the overall expression evaluates to the value of $plenty.
If the test expression happens to be false, the overall expression will take on the value of $few instead.