Bug #80654 [Opn]: file_get_contents() maxlen fails above (2**31)-1 bytes

Edit report at https://bugs.php.net/bug.php?id=80654&edit=1 ID: 80654 Updated by: cmb@php.net Reported by: divinity76+spam at gmail dot com Summary: file_get_contents() maxlen fails above (2**31)-1 bytes Status: Open Type: Bug Package: *Directory/Filesystem functions PHP Version: 7.3.26 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: The same happens with stream_get_contents(). Previous Comments: ------------------------------------------------------------------------ [2021-01-22 02:35:54] divinity76+spam at gmail dot com Description: ------------ when file_get_contents() is instructed to get the first (2**31) bytes of a file that is exactly (2**31) bytes big, php will only fetch the first (2**31)-1 bytes. Test script: --------------- rm -f bug; dd if=/dev/null count=0 bs=1 seek=2147483648 of=bug; php -r 'ini_set("memory_limit","-1");var_dump(strlen(file_get_contents("bug")));'; php -r 'ini_set("memory_limit","-1");var_dump(strlen(file_get_contents("bug", false, null, 0, 2147483648)));'; Expected result: ---------------- int(2147483648) int(2147483648) Actual result: -------------- hansh@LAPTOP-1PLMKU02 ~ $ rm -r bug; dd if=/dev/null count=0 bs=1 seek=2147483648 of=bug ; php -r 'ini_set("memory_limit","-1");var_dump(strlen(file_get_contents("bug")));' 0+0 records in 0+0 records out 0 bytes copied, 0.0023186 s, 0.0 kB/s int(2147483648) hansh@LAPTOP-1PLMKU02 ~ $ rm -r bug; dd if=/dev/null count=0 bs=1 seek=2147483648 of=bug ; php -r 'ini_set("memory_limit","-1");var_dump(strlen(file_get_contents("bug", false, null, 0, 2147483648)));'0+0 records in 0+0 records out 0 bytes copied, 0.0030518 s, 0.0 kB/s PHP Warning: file_get_contents(): maxlen truncated from 2147483648 to 2147483647 bytes in Command line code on line 1 int(2147483647) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80654&edit=1