Bug #52265 [NEW]: Defaulting a class-function-param to 0 makes an IF see it as true when comparin

From: Operating system: Linux PHP version: 5.2.13 Package: Scripting Engine problem Bug Type: Bug Bug description:Defaulting a class-function-param to 0 makes an IF see it as true when comparin Description: ------------ Defaulting a class-function-param to 0 makes an IF see it as true when comparing it to a string. function fillSelectBox($selected = 0) { $txt = ''; $obj = new RetailerCountry(); $objs = $obj->getAll(); foreach ($objs as $ob) { $id = $ob->getAttrib('retailercountry'); $name = $ob->getAttrib('retailercountry'); $txt .= $ob->getAttrib('retailercountry'); echo 'i:'.$id; echo 's:'.$selected; if ($id == $selected) { $txt .= ' * '; } $txt .= '<br>'; } return $txt; } The result for this function is: every word that's displayed gets a star *. This changes when I change the input param to $selected = ''. But did or does PHP every care about this? I don't to do some kind of strict typing! Regards MD Test script: --------------- function fillSelectBox($selected = 0) { $txt = ''; $obj = new RetailerCountry(); $objs = $obj->getAll(); foreach ($objs as $ob) { $id = $ob->getAttrib('retailercountry'); $name = $ob->getAttrib('retailercountry'); $txt .= $ob->getAttrib('retailercountry'); echo 'i:'.$id; echo 's:'.$selected; if ($id == $selected) { $txt .= ' * '; } $txt .= '<br>'; } return $txt; } Expected result: ---------------- The result for this function is: every word that's displayed gets a star *. This changes when I change the input param to $selected = ''. But did or does PHP every care about this? I don't to do some kind of strict typing! -- Edit bug report at http://bugs.php.net/bug.php?id=52265&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=52265&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=52265&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=52265&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=52265&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=52265&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=52265&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=52265&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=52265&r=needscript Try newer version: http://bugs.php.net/fix.php?id=52265&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=52265&r=support Expected behavior: http://bugs.php.net/fix.php?id=52265&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=52265&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=52265&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=52265&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52265&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=52265&r=dst IIS Stability: http://bugs.php.net/fix.php?id=52265&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=52265&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=52265&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=52265&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=52265&r=mysqlcfg