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麻烦大家帮我看下这句代码

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Release: 2016-06-23 13:34:08
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$email = isset($fdata['email']) && !empty($fdata['email']) ? htmlspecialchars($fdata['email']) : '';
(htmlspecialchars() 函数把一些预定义的字符转换为 HTML 实体。)

?  htmlspecialchars($fdata['email']) : '';这段是什么意思?


回复讨论(解决方案)

$a=$b?$b:$c;
相当于if($b){$a=$b}else{$a=$c}

三元运算
结果 = 条件 ? 条件成立时的值 : 条件不成立时的值

等价于
if(条件) {
  结果 = 值
}else {
  结果 = 值
}

在你示例的代码中,这是在做 无效劳动!
因为 Email 中是不会含有 HTML 字符的,否在就是非法的 email
所以有没有 htmlspecialchars 都一样

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