Sid中PHP是不是有变量类型转换的bug,装了PHP的兄弟帮我测试一段简短代码

upsdn

就是将浮点数转换成 整型

1. <?php
   
2. 
   
3. //header("Content-Type: text/plain; charset=utf-8");
   
4. 
   
5. $n = -6288256054;
   
6. var_dump($n);
   
7. 
   
8. $a = intval($n);
   
9. var_dump($a);
   
10. 
    
11. $b = (int) $n;
    
12. var_dump($b);
    
13. 
    
14. settype($n,"int");
    
15. var_dump($n);
    
16. 
    
17. ?>

复制代码

在host.sk的主机（geentoo PHP5.0.3)和自己一个Debian sarege(PHP4.3.11)主机上测试都是正确的

float(-6288256054)
int(-1993288758)
int(-1993288758)
int(-1993288758)

但是在，sid中，不管是php4.4.0还是.5.0.3都有问题，结果是

float(-6288256054)
int(-2147483648)
int(-2147483648)
int(-2147483648)


怎么回事啊，用SID的兄弟帮我测试一下啊

carlos

I think sid is correct.
See http://php.net/intval

The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.

upsdn

Post by carlos
I think sid is correct.
See http://php.net/intval

没道理 intval($n) 当$n 是一个32bit不能保存的数，如long long类型的数，都强制为-2147483648 了吧