How to use php ternary operator

1. Ternary operator format: (expr1) ? (expr2) : (expr3)

2. Logical operation

Note: Remember to add parentheses for addition and subtraction operations, otherwise the system may not recognize them sometimes.

Example:

<?php
/**
 * Created by PhpStorm.
 * User: 洋   汪
 * Date: 2016/7/14
 * Time: 16:22
 */
header("Content-type:text/html;charset=utf-8");
$a = 100;
$b = 50;
//注意加减法要加括号，不然不识别。
echo "a + b=" . ($a + $b) . "<br>";
if ($a > 10 && $b > 10) {
    echo "a和b都大于10" . "<br>";
} else {
    echo "a和b都小于10" . "<br>";
}

//三目运算符：
$c = 60;
//如果$c与50相等，则$v的值为字符串：真值；否则，$v的值为字符串：假值。
$v = ($c == 50) ? "真值" : "假值";
echo $v;
?>

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