Fix wrong argument number in fsockopen/pfsockopen timeout error - #23431
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lacatoire wants to merge 1 commit into
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Fix wrong argument number in fsockopen/pfsockopen timeout error#23431lacatoire wants to merge 1 commit into
lacatoire wants to merge 1 commit into
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php_fsockopen_stream() called zend_argument_value_error(6, ...) for the $timeout parameter, but $timeout is the 5th argument. This caused the error message to show "Argument php#6" with no parameter name, since get_function_arg_name() returns NULL when arg_num exceeds the actual argument count. The format string also contained ZEND_ULONG_FMT (which expects a zend_ulong) but received a double expression, causing undefined behavior. This is fixed by casting to zend_ulong before the call.
LamentXU123
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Aug 24, 2026
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in 32-bits. zend_ulong is uint32_t. So you can't directly convert double to zend_ulong in all platforms
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php_fsockopen_stream()calledzend_argument_value_error(6, ...)for the$timeoutparameter, but$timeoutis the 5th argument. Becauseget_function_arg_name(func, arg_num)returnsNULLwhenarg_numexceeds the actual argument count, the error message reported the wrong number and dropped the parameter name.The format string also used
ZEND_ULONG_FMT(which expects azend_ulong) but received adoubleexpression — undefined behavior in C. This is fixed by adding a(zend_ulong)cast.Before:
After:
The same fix applies to
pfsockopen(), which delegates to the same internal helper.A regression test is included; it does not require network connectivity since the
ValueErroris raised before any connection attempt.