PHP 三元运算 ??与?:
摘要：
//$c = $a ?? $b; 等效 $c = isset($a) ? $a : $b; //$c = $a ?: $b; 等效 $c = $a ? $a : $b; $a = 'a'; $b = 'b'; $c = $a ?? $b; //a $c = $a ?: $b; //a $a = false; $b = 'b'; $c = $a ?? $b; //false $c = ... 阅读全文
posted @ 2019-04-02 15:32 你看我哪里像好人 阅读(1306) 评论(0) 推荐(0) 编辑
