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<?php function generate_upc_checkdigit($upc_code) { $odd_total = 0; $even_total = 0; for($i=0; $i<7; $i++) { if((($i+1)%2) == 0) { /* Sum even digits */ $even_total += $upc_code[$i]; } else { /* Sum odd digits */ $odd_total += $upc_code[$i]; } } $sum = (3 * $odd_total) + $even_total; /* Get the remainder MOD 10*/ $check_digit = $sum % 10; /* If the result is not zero, subtract the result from ten. */ return ($check_digit > 0) ? 10 - $check_digit : $check_digit; } echo generate_upc_checkdigit("123456"); ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Uninitialized string offset 6 in /in/DCER7 on line 16 Fatal error: Uncaught TypeError: Unsupported operand types: int + string in /in/DCER7:16 Stack trace: #0 /in/DCER7(29): generate_upc_checkdigit('123456') #1 {main} thrown in /in/DCER7 on line 16
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 Warning: Uninitialized string offset 6 in /in/DCER7 on line 16 Fatal error: Uncaught TypeError: Unsupported operand types: int + string in /in/DCER7:16 Stack trace: #0 /in/DCER7(29): generate_upc_checkdigit('123456') #1 {main} thrown in /in/DCER7 on line 16
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Uninitialized string offset: 6 in /in/DCER7 on line 16 Warning: A non-numeric value encountered in /in/DCER7 on line 16 1
Output for 7.3.32 - 7.3.33
Warning: A non-numeric value encountered in /in/DCER7 on line 16 1
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Notice: Uninitialized string offset: 6 in /in/DCER7 on line 16 1
preferences:
220.18 ms | 402 KiB | 271 Q