Doc #79126 [Ver->Csd]: empty() documentation does not mention SimpleXML objects from empty tags

From: Date: Mon, 07 Dec 2020 14:42:11 +0000
Subject: Doc #79126 [Ver->Csd]: empty() documentation does not mention SimpleXML objects from empty tags
References: 1  Groups: php.doc.bugs 
Request: Send a blank email to doc-bugs+get-18210@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=79126&edit=1

 ID:                 79126
 Updated by:         phpdocbot@php.net
 Reported by:        dse at webonastick dot com
 Summary:            empty() documentation does not mention SimpleXML
                     objects from empty tags
-Status:             Verified
+Status:             Closed
 Type:               Documentation Problem
 Package:            SimpleXML related
 Operating System:   macOS
 PHP Version:        7.4.1
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

Automatic comment on behalf of cmb
Revision: http://git.php.net/?p=doc/en.git;a=commit;h=3ae0b14dd06ea9d47728f366dfe2c29476a2468e
Log: Fix #79126: empty() documentation does not mention SimpleXML objects from empty tags


Previous Comments:
------------------------------------------------------------------------
[2020-12-07 14:40:22] cmb@php.net

Automatic comment from SVN on behalf of cmb
Revision: http://svn.php.net/viewvc/?view=revision&revision=351947
Log: Fix #79126: empty() documentation does not mention SimpleXML objects from empty tags

To avoid duplication, we refer to falsey values instead.

------------------------------------------------------------------------
[2020-01-15 19:28:11] dse at webonastick dot com

Description:
------------
---
From manual page: https://php.net/function.empty
---

<https://php.net/function.empty> mentions that
for the following values, empty() will return TRUE:

- an unset variable
- ""
- 0
- 0.0
- "0"
- NULL
- FALSE
- array()

The documentation does not mention that a SimpleXML object from an empty tag is also considered
empty, thus empty() also returns TRUE for one.

I figured this out after checking <https://www.php.net/manual/en/language.types.boolean.php>
while writing something for a PHP cheatsheet.

Test script:
---------------
$ php -r '$foo = new SimpleXMLElement("<html>5</html>"); print $foo ?
"truthy\n" : "falsy\n";'
truthy

$ php -r '$foo = new SimpleXMLElement("<html></html>"); print $foo ?
"truthy\n" : "falsy\n";'
falsy




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