Hello all:
    Not long ago I wrote some php code in my computer which had a apache server,and my 
php version is 4.0.5.The code as followed:
    $num = 2886732778;
    settype($num, integer);
    echo $num;
    And I found the num is -2147483648.attention,please:the version of php is 4.0.5.
    When I installed php-4.2.0 in my computer,however,I found the output of result is 

    Why did the difference between the two version php happen?Is this a bug???

Any help is appreciated!

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