Bug #75141 [Opn->Nab]: implode returns NULL at times.

Edit report at https://bugs.php.net/bug.php?id=75141&edit=1 ID: 75141 Updated by: requinix@php.net Reported by: abeal at eelzee dot com Summary: implode returns NULL at times. -Status: Open +Status: Not a bug Type: Bug -Package: PHP Language Specification +Package: *General Issues Operating System: ANY PHP Version: 5.6.31 Block user comment: N Private report: N New Comment: Did you notice that it prints "TRUE" and not "Is null: TRUE"? http://php.net/manual/en/language.operators.precedence.php print "Is null: " . (NULL === implode(" - ", []) ? "TRUE" : "FALSE"); Previous Comments: ------------------------------------------------------------------------ [2017-08-31 20:27:22] abeal at eelzee dot com Description: ------------ --- From manual page: http://www.php.net/function.implode --- It seems that in certain cases, implode returns NULL. This seems in violation of the specification. One of the commenters mentions that it will do so if passed a string as well. Should this not be rectified, at least for future versions? If not, should the documentation be updated to reflect the circumstances where NULL is returned instead of an empty string? Test script: --------------- // Prints "TRUE"; print "Is null: " . (NULL === implode(" - ", [])) ? "TRUE" : "FALSE"; ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75141&edit=1