Doc #68542 [Opn->Csd]: Relational operators semantics is different with actual behavior.

Edit report at https://bugs.php.net/bug.php?id=68542&edit=1 ID: 68542 Updated by: stas@php.net Reported by: y dot uchiyama dot 1015 at gmail dot com Summary: Relational operators semantics is different with actual behavior. -Status: Open +Status: Closed Type: Documentation Problem Package: PHP Language Specification PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Automatic comment on behalf of smalyshev@gmail.com Revision: http://git.php.net/?p=php-langspec.git;a=commit;h=976a43c717d81cba08b81d5cfa2ed569979d0e2b Log: Fixed bug #68542 Previous Comments: ------------------------------------------------------------------------ [2014-12-03 14:02:40] y dot uchiyama dot 1015 at gmail dot com Description: ------------ The semantics of relational operators (in 10-expressions.md) is different with the actual behavior of PHP, in case that both operands are string (the semantics says rules 2 and 4 are applied). In this case, numeric comparison is applied only if both operands are numeric string without overflow, otherwise lexical comparison is applied. Some examples are shown below. echo ('1' == '0x1') . "\n"; // true echo ('1' == '1a') . "\n"; // false echo ('1234567890' == '1234567890.0') . "\n"; // true echo ('123456789012345678901234567890' == '123456789012345678901234567890.0') . "\n"; // false echo ('1e10' == '1.0e10') . "\n"; // true echo ('1e1000' == '1.0e1000') . "\n"; // false ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=68542&edit=1