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run code in 150+ php & hhvm versions
Bugs & Features
<?php $num = base_convert("fffffffe",16,2); var_dump($num); $arr = str_split($num); for ($i=0,$max = count($arr)-1; $i <=$max; $i++) { if ($arr[$i] == '1' ) { $arr[$i] = '0'; } else if ($arr[$i] == '0') { $arr[$i] = '1'; } } $str = join('',$arr); var_dump($str); $converted = base_convert($str,2,16); $hex = '0x'.$converted; $a = gmp_add($hex,"1"); echo gmp_strval($a),'<BR>'; $a = -(gmp_intval($a)); var_dump($a);
Output for 5.4.0 - 5.5.34, 5.6.8 - 5.6.20, 5.6.28 - 7.0.5, 7.0.12 - 7.1.0
string(32) "11111111111111111111111111111110" string(32) "00000000000000000000000000000001" 2<BR>int(-2)
Output for 7.0.6
string(32) "11111111111111111111111111111110" string(32) "00000000000000000000000000000001" Fatal error: Uncaught Error: Call to undefined function gmp_add() in /in/kHH1D:18 Stack trace: #0 {main} thrown in /in/kHH1D on line 18
Process exited with code 255.
Output for 5.0.0 - 5.3.29, 5.5.35, 5.6.21
string(32) "11111111111111111111111111111110" string(32) "00000000000000000000000000000001" Fatal error: Call to undefined function gmp_add() in /in/kHH1D on line 18
Process exited with code 255.
Output for 4.4.5 - 4.4.9
string(32) "11111111111111111111111111111110" Fatal error: Call to undefined function: str_split() in /in/kHH1D on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
string(32) "11111111111111111111111111111110" Fatal error: Call to undefined function: str_split() in /in/kHH1D on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
string(32) "11111111111111111111111111111110" Fatal error: Call to undefined function: str_split() in /in/kHH1D on line 4