php if语句的缩写 实例
主要是三目运算符Basic True / False Declaration
$is_admin = ($user['permissions'] == 'admin' ? true : false);
Conditional Welcome Message
echo 'Welcome '.($user['is_logged_in'] ? $user['first_name'] : 'Guest').'!';
Conditional Items Message
echo 'Your cart contains '.$num_items.' item'.($num_items != 1 ? 's' : '').'.';
Conditional Error Reporting Level
error_reporting($WEBSITE_IS_LIVE ? 0 : E_STRICT);
Conditional Basepath
echo '<base href="http'.($PAGE_IS_SECURE ? 's' : '').'://mydomain.com" />';
Nested PHP Shorthand
echo 'Your score is: '.($score > 10 ? ($age > 10 ? 'Average' : 'Exceptional') : ($age > 10 ? 'Horrible' : 'Average') );
Leap Year Check
$is_leap_year = ((($year % 4) == 0) && ((($year % 100) != 0) || (($year %400) == 0)));
Conditional PHP Redirect
header('Location: '.($valid_login ? '/members/index.php' : 'login.php?errors=1')); exit();
IF ... ELSE
$text = "There ".
($total==1 ? "is 1 item" :
"are ".($total == 0 ? "no items" : "$total items")
);
//Compared to:
if($total==0) {
$text = "There are no items";
}
else if($total==1) {
$text = "There is 1 item";
}
else if($total > 0) {
$text = "There are $total items";
}
if($foo) {
$str = 'yes';
}
//Compared to:
$foo && $str = 'yes';
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