note 129594 added to language.types.integer

Regarding the part about PHP does not support unsigned ints, this often causes much confusion when using the hard-coded minimum value of a signed integer that matches PHP_INT_MIN. <?php // 64-bit example var_dump(PHP_INT_MIN); var_dump(-9223372036854775808); var_dump(PHP_INT_MIN === -9223372036854775808); // int(-9223372036854775808) // float(-9.223372036854776E+18) // bool(false) ?> Although visually, I've typed the same value that PHP_INT_MIN writes out -9223372036854775808, the language parser only understands it as two expressions with a negate operator followed by 9223372036854775808. The value exceeds the maximum value of an integer by one, and is promoted to a float. Although it's been suggested in the past to wire up a hook to look for this value specifically, it's more difficult than it sounds. The tokenizer is unable to evaluate both the negate and integer as one token. In addition, you would also need to address binary, octal, and hex literals. <?php var_dump(-9223372036854775808); // literal decimal var_dump(-0x8000000000000000); // literal hex var_dump(-0b1000000000000000000000000000000000000000000000000000000000000000); // literal binary var_dump(-01000000000000000000000); // literal octal ?> If you need to hard-code the minimum value, use PHP_INT_MIN. It was introduced specifically for this edge case. Alternative methods are to write -9223372036854775807 - 1. ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.84.18 (proxied: 204.111.141.3) ---- Manual Page -- https://php.net/manual/en/language.types.integer.php Edit -- https://main.php.net/note/edit/129594 Del: integrated -- https://main.php.net/note/delete/129594/integrated Del: useless -- https://main.php.net/note/delete/129594/useless Del: bad code -- https://main.php.net/note/delete/129594/bad+code Del: spam -- https://main.php.net/note/delete/129594/spam Del: non-english -- https://main.php.net/note/delete/129594/non-english Del: in docs -- https://main.php.net/note/delete/129594/in+docs Del: other reasons-- https://main.php.net/note/delete/129594 Reject -- https://main.php.net/note/reject/129594 Search -- https://main.php.net/manage/user-notes.php