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<?php /** * @see https://community.developer.authorize.net/t5/The-Authorize-Net-Developer-Blog/Precision-Math-with-PHP/ba-p/8368 */ var_dump(floor((0.2 + 1.4) * 10)); // Should be 16. But it's 15! // Using BC Math var_dump(bcadd('0.2', '1.4', 2) * 10); // It's 16 like we would expect it to be. // Using GMP var_dump(gmp_add('0.2', '1.4') * 10);
Output for 8.0.2 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
float(15) float(16) Fatal error: Uncaught ValueError: gmp_add(): Argument #1 ($num1) is not an integer string in /in/KKZWP:13 Stack trace: #0 /in/KKZWP(13): gmp_add('0.2', '1.4') #1 {main} thrown in /in/KKZWP on line 13
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 float(15) float(16) Fatal error: Uncaught ValueError: gmp_add(): Argument #1 ($num1) is not an integer string in /in/KKZWP:13 Stack trace: #0 /in/KKZWP(13): gmp_add('0.2', '1.4') #1 {main} thrown in /in/KKZWP on line 13
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
float(15) Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/KKZWP:10 Stack trace: #0 {main} thrown in /in/KKZWP on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.1
float(15) float(16) Fatal error: Uncaught TypeError: gmp_add(): Argument #1 ($num1) is not an integer string in /in/KKZWP:13 Stack trace: #0 /in/KKZWP(13): gmp_add('0.2', '1.4') #1 {main} thrown in /in/KKZWP on line 13
Process exited with code 255.
Output for 5.6.0 - 5.6.20, 5.6.28, 7.0.0 - 7.0.5, 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.32
float(15) float(16) Warning: gmp_add(): Unable to convert variable to GMP - string is not an integer in /in/KKZWP on line 13 int(0)
Output for 7.0.6 - 7.0.10
float(15) float(16) Fatal error: Uncaught Error: Call to undefined function gmp_add() in /in/KKZWP:13 Stack trace: #0 {main} thrown in /in/KKZWP on line 13
Process exited with code 255.
Output for 5.5.35 - 5.5.38, 5.6.21 - 5.6.25
float(15) float(16) Fatal error: Call to undefined function gmp_add() in /in/KKZWP on line 13
Process exited with code 255.
Output for 5.5.0 - 5.5.34
float(15) float(16) int(0)
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208.02 ms | 401 KiB | 255 Q