BNW/sourcecodes/runtime_check.php, branch main

Guard arithmetic on file/shell-output-derived values against non-numeric strings

2026-08-17T19:53:21+00:00

PHP 8 throws a fatal TypeError for arithmetic (+ - * /) on a non-numeric string ("Unsupported operand types"); PHP 7.4 only warned and treated it as 0. Several files perform arithmetic directly on values parsed from intermediate state files (nnode.txt, nrows.txt, structure_input*.txt) or from `dot -Tplain` output, with no is_numeric() check — safe as long as those files are well-formed, but a crash risk if a file is missing/empty/truncated or a `dot` output line doesn't parse as expected. Affected: runtime_check.php ($node, $nrows), remove_variables.php and create_tiers_gom_part1.php ($maxplist=$node-1), mat_structure.php (matrix cell multiplication), and the four network_layout_{evd,inv}[,_2].php files ($r_index=$node+N and the dot-output-derived $cell arithmetic in the _2 variants). Fix pattern: coalesce to 0 via `is_numeric($x) ? $x : 0` before the arithmetic, matching PHP 7.4's original fallback-to-0 behavior instead of crashing. Verified empirically against PHP 8.3.28 with runtime_check.php and mat_structure.php: previously, a missing/empty source file caused TypeError: Unsupported operand types: string - int (or string * int) after the fix, the same missing-file scenario produces only the pre-existing "undefined array key" warnings (same as PHP 7.4) and the function completes and returns a value instead of crashing. Reviewed by: Frederick M Muriithi

Remove orphaned fwrite() call in runtime_check.php that crashes on PHP 8

2026-08-17T19:52:12+00:00

$fprows and $lc were never defined anywhere in exe_time(). On PHP 7.4 fwrite() with a null resource argument just emitted warnings and returned false. On PHP 8+, fwrite() requires a resource/false is no longer coerced, so this throws an uncaught TypeError on every call, crashing any page that invokes exe_time() (progress-tracking pages). Verified empirically against PHP 8.3.28: before the fix, calling exe_time() throws TypeError: fwrite(): Argument #1 ($stream) must be of type resource, null given after the fix it returns the computed runtime estimate as before. Reviewed by: Frederick M Muriithi

Moving final GENENET8 version to master

2021-02-24T21:19:03+00:00

GENENET8 update

2021-02-24T20:36:59+00:00

Add files via upload

2017-09-14T20:57:50+00:00