binarycleric binarycleric - 4 years ago 141
PHP Question

Checking if your code is running on 64-bit PHP

Does anyone know of a way of checking within PHP if the script is running as either 32-bit or 64-bit? Currently I'm using PHP 5.3.5.

Ideally I'd like to write a function so my code can look like this:

if( is_32bit() === true ) {

Anyone have any thoughts?

Answer Source

Check the PHP_INT_SIZE constant. It'll vary based on the size of the register (i.e. 32-bit vs 64-bit).

In 32-bit systems PHP_INT_SIZE should be 4, for 64-bit it should be 8.

See for more details.

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