Req #61946 [NEW]: Implement array_first() and array_last()

From: Date: Sat, 05 May 2012 02:22:29 +0000
Subject: Req #61946 [NEW]: Implement array_first() and array_last()
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-170204@lists.php.net to get a copy of this message 
From:             
Operating system: 
PHP version:      Irrelevant
Package:          Arrays related
Bug Type:         Feature/Change Request
Bug description:Implement array_first() and array_last()

Description:
------------
Retrieving the first or the last element of an array (without modifying the
array) is a very common task.

It is really annoying that PHP wouldn't come with built-in functions to do
that.

Can you please implement the following 2 array functions:
array_first(array $array) - returns the first element of $array
array_last(array $array) - returns the last element of $array

Also consider implementing another pair of function to retrieve the keys:
array_first_key and array_last_key.

Test script:
---------------
$test = array(
  100 => "a",
  200 => "b",
  300 => "c",
  400 => "d");

echo array_first($test)."\n";
echo array_last($test)."\n";
echo key($test)."\n";
echo implode(",", $test);

Expected result:
----------------
a
d
100
a,b,c,d

Actual result:
--------------
Fatal error:  Call to undefined function array_first() on line 3

-- 
Edit bug report at https://bugs.php.net/bug.php?id=61946&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=61946&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=61946&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=61946&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=61946&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61946&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=61946&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=61946&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=61946&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=61946&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=61946&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=61946&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=61946&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=61946&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=61946&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=61946&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=61946&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=61946&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=61946&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=61946&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=61946&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=61946&r=mysqlcfg

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