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number_format could't work collectly?




Hi,everyone.

I have a problem about number_format.

There is a bit variable like :
0101100111010110101001110001110000010101000000000000110000000001

when I just echo ,that is:
6473545253444914177

work well,but when I use number_format :

number_format(bindec('0101100111010110101001110001110000010101000000000000110000000001'),'0','','');

It echo:
6473545253444914176

Can somebody could tell me why?