_php example of converting signed integer to unsigned integer method in PHP

In a short address project, the ID of the short address map of the six-bit character becomes a signed integer when the ID exceeds 2147483647, according to the mapping algorithm between the six-bit character and the ID.

Copy Code code as follows:

ID > Six-bit character > Mapping ID

id:2147483644 > Tfffvq > 2147483644
id:2147483645 > Efffvq > 2147483645
id:2147483646 > Nfffvq > 2147483646
id:2147483647 > Ffffvq > 2147483647
id:2147483648 > Nnnnnu >-2147483648
id:2147483649 > Dnnnnu >-2147483647
id:2147483650 > Rnnnnu >-2147483646

You need to convert a signed integer to an unsigned integral type: (float) sprintf ('%u ', $id)

PHP website on the whole type of information: http://php.net/manual/zh/language.types.integer.php