Doc #81511 [NEW]: Evaluation order for . operator should be specified

From: dean at omnivisiontechnology dot com Operating system: n/a PHP version: Irrelevant Package: Unknown/Other Function Bug Type: Documentation Problem Bug description:Evaluation order for . operator should be specified Description: ------------ --- From manual page: https://php.net/language.operators.string --- In general, PHP doesn't specify the order of evaluation for operators. However, order of evaluation for the string concatenation operator specifically, does always seem to be left then right. If this can indeed be guaranteed, then it should be specified in the documentation, because it enables the very common coding idiom: $string = 'something'.($complicatedSubstring = 'something else').'more stuff'.$complicatedSubstring; Test script: --------------- $s = '[Very bad!]' $x = 'bar '.($s = 'foo').' bar bar '.$s.' bar'; Expected result: ---------------- $x should be 'bar foo bar bar foo bar'. It'd be very unexpected for it to be 'bar foo bar bar [Very bad!] bar', But that's what could happen if the . operator evaluated the RHS first... which fortunately it doesn't appear to. -- Edit bug report at https://bugs.php.net/bug.php?id=81511&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=81511&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=81511&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=81511&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=81511&r=needscript Try newer version: https://bugs.php.net/fix.php?id=81511&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=81511&r=support Expected behavior: https://bugs.php.net/fix.php?id=81511&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=81511&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=81511&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=81511&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=81511&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=81511&r=dst IIS Stability: https://bugs.php.net/fix.php?id=81511&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=81511&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=81511&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=81511&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=81511&r=mysqlcfg