Bug #78301 [Com]: exit -1 is valid but exit 1 is syntax error
Edit report at https://bugs.php.net/bug.php?id=78301&edit=1
ID: 78301
Comment by: dams@php.net
Reported by: dams@php.net
Summary: exit -1 is valid but exit 1 is syntax error
Status: Not a bug
Type: Bug
Package: *General Issues
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
php -r 'exit (-1);' && echo "minus one" => OK
php -r 'exit -1;' && echo "minus one" => No display
'exit -1' is actually '(exit) - 1'; Since the script ends early with exit, it
never reaches the substraction, nor any other following operation, in fact (*, +, &&)...
Previous Comments:
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[2019-07-17 08:03:14] nikic@php.net
exit -1 is (exit) - 1. The form without parentheses should probably be
deprecated to avoid this kind of confusion.
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[2019-07-17 07:44:13] dams@php.net
Description:
------------
Using a plus or minus sign allows exit to avoid parenthesis.
The behavior should be consistent : either parenthesis are always needed, either they are optional.
Either enforce parenthesis in both cases (suggested modification),
or relax parenthesis usage in both cases.
Same applies to die;
Test script:
---------------
exit 1; <= syntax error
exit (1) <= executable code
exit -1; <= executable code
exit +1; <= executable code
exit -+-1; <= executable code
exit -$f; <= executable code
exit $f; <= syntax error
exit($f); <= executable code
Expected result:
----------------
exit and die use parenthesis the same way, with or without minus and plus signs.
Actual result:
--------------
exit and die behaves differently parenthesis with or without minus and plus signs.
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Edit this bug report at https://bugs.php.net/bug.php?id=78301&edit=1
Thread (4 messages)