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Bug #75141 implode returns NULL at times.
Submitted: 2017-08-31 20:27 UTC Modified: 2017-08-31 20:35 UTC
From: abeal at eelzee dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.6.31 OS: ANY
Private report: No CVE-ID: None
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From: abeal at eelzee dot com
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 [2017-08-31 20:27 UTC] 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";

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 [2017-08-31 20:35 UTC] requinix@php.net
-Status: Open +Status: Not a bug -Package: PHP Language Specification +Package: *General Issues
 [2017-08-31 20:35 UTC] requinix@php.net 
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");
 [2017-08-31 20:55 UTC] abeal at eelzee dot com 
*sigh*.  It did seem rather egregious to have gone unnoticed for so long.  Apologies, everyone; bug withdrawn.
 
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