https://www.w3schools.com/Php/func_filesystem_fgetc.asp
PHP fgetc() Function
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phpfgetcfunction
https://www.intel.com/content/www/us/en/docs/fortran-compiler/developer-guide-reference/2025-2/fgetc.html
FGETC
Portability Function: Reads the next available character from a file specified by a Fortran unit number.
fgetc
https://www.php.net/manual/it/splfileobject.fgetc.php
PHP: SplFileObject::fgetc - Manual
Gets character from file
phpsplfileobjectfgetcmanual
https://www.php.net/manual/zh/function.fgetc.php
PHP: fgetc - Manual
phpfgetcmanual