Questions about "0 xFFFFFFFF" and 0xFFFFFFFF in php7

{Code ...} the value of the above Code on the platforms below php7 (not included) is: {code ...} the value in PHP 7 is: {code ...} how can I handle 0x in the PHP 7 environment. $ str make it the same as the nominal value?

$t1 = 0x3FFFFFFF & (1 * (0xd5b42e11));$t2 = 0x3FFFFFFF & (1 * ("0xd5b42e11"));var_dump($t1,$t2);

The value of the above Code on the php7 (not included) platform is:

int(364129809)int(364129809)

The value in PHP 7 is:

int(364129809)int(0)

What should I do in the php7 environment?0x. $ strSo that it is the same as the nominal value?

Reply content:

$t1 = 0x3FFFFFFF & (1 * (0xd5b42e11));$t2 = 0x3FFFFFFF & (1 * ("0xd5b42e11"));var_dump($t1,$t2);

The value of the above Code on the php7 (not included) platform is:

int(364129809)int(364129809)

The value in PHP 7 is:

int(364129809)int(0)

What should I do in the php7 environment?0x. $ strSo that it is the same as the nominal value?

Starting from PHP7, The hexadecimal string is no longer considered a number.
If you want to check whether the string contains hexadecimal numbers, the officially recommended code is

For your problem, you should change it

$t1 = 0x3FFFFFFF & (1 * (0xd5b42e11));$t2 = 0x3FFFFFFF & (1 * (filter_var("0xd5b42e11", FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX)));var_dump($t1,$t2);