i want to know the internal impliment of php, for example , the int length, the CRC method, or the Memory Managment.... when i write php, i do not know the difference ,but in fact it is difference on 32 and 64 architecture. Some one can tell me ? or for example?
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http://stackoverflow.com/questions/5423848/checking-if-your-code-is-running-on-64-bit-php – Marc B Nov 27 '13 at 16:07
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The suckage is wider on 64-bit. – Martin James Nov 27 '13 at 18:30
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The difference is that on 64-bit PHP, the int type is 64 bits, while on 32-bit, it's 32 bits. This shows when a function uses all 32 bits of the type, such as the crc function - if you print out the value, it will be positive under 64-bit, while it might be negative (if the MSB is 1) on 32-bit. The overflow (PHP_MAX_INT) will also be different depending on the version. There has been some discussion on fixing this and automagically promoting a 32-bit value to 64-bit value even on 32-bit architectures iirc.
The comment on your question shows how you can determine if you're on 32- or 64-bit PHP.
MatsLindh
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