84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
如下所示
const X = 'x'; const XX = X.'x';
第二行有语法错误,正确的格式应该是什么样呢。
认证0级讲师
升级PHP5.6
http://cn2.php.net/manual/zh/migration56.new-features.php#migration56.new-features.const-scalar-exprs
常量的值;仅允许标量和 null 。标量的类型是 integer , float , string 或者 boolean 。 也能够定义常量值的类型为 resource ,但并不推荐这么做,可能会导致未知状况的发生。
解决方案:
const X1 = 'x1'; const X2 = 'x2'; echo X1.X2;
当然你也可以选择升级,正如 @mcfog 所说~
升级PHP5.6
http://cn2.php.net/manual/zh/migration56.new-features.php#migration56.new-features.const-scalar-exprs
解决方案:
当然你也可以选择升级,正如 @mcfog 所说~