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run code in 150+ php & hhvm versions
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<?php $bits = 32; $N = 0xfffffffe; $result = -( gmp_pow("2", $bits) - $N); echo gmp_strval($result),"\n";
Output for 5.6.0 - 5.6.20, 5.6.28 - 7.0.5, 7.0.14 - 7.1.0
-2
Output for 7.0.6 - 7.0.7
Fatal error: Uncaught Error: Call to undefined function gmp_pow() in /in/TJenv:5 Stack trace: #0 {main} thrown in /in/TJenv on line 5
Process exited with code 255.
Output for 5.0.0 - 5.3.29, 5.5.35 - 5.5.36, 5.6.21 - 5.6.22
Fatal error: Call to undefined function gmp_pow() in /in/TJenv on line 5
Process exited with code 255.
Output for 5.4.0 - 5.5.34
4294967289
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: gmp_pow() in /in/TJenv on line 5
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: gmp_pow() in /in/TJenv on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: gmp_pow() in /in/TJenv on line 5