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Request #60684 Add 'last' & 'first' blocks next to 'foreach' block
Submitted: 2012-01-08 06:41 UTC Modified: 2016-12-01 13:33 UTC
Votes:6
Avg. Score:3.0 ± 2.0
Reproduced:1 of 3 (33.3%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: aram_alipoor2010 at yahoo dot com Assigned:
Status: Suspended Package: Scripting Engine problem
PHP Version: 5.4.0RC5 OS: All
Private report: No CVE-ID: None
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 [2012-01-08 06:41 UTC] aram_alipoor2010 at yahoo dot com 
Description:
------------
There are a lot of situations that we want our foreach loop act different for first and/or last item. It will be so easy if php add these to concepts as blocks next to foreach. Compiler will run 'first' block for first item, and 'last' block for last item, and normal 'foreach' block for anything in between. The only special case is when array has only one item, in this situation only 'first' block will act. See example at test script.

Test script:
---------------
foreach($array as $key => $value)
{
 $str .= $key . ' = "'.$value.'",';
}
first
{
 $str .= '(' . $key . ' = "'.$value.'",';
}
last
{
 $str .= $key . ' = "'.$value.'")';
}

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 [2012-05-05 03:34 UTC] phristen at yahoo dot com 
I'm onboard with loop { } else { } construct, but this is an overkill.
I'd much rather have 2 additional array functions: is_array_last(array $array) and is_array_first(array $array)... Of course, I don't insist on these function names, but they should basically return true or false when array pointer is at the first position, or at the last position.
 [2016-06-14 17:53 UTC] cmb@php.net 
In my opinion, the given use case is doubtful. I might write it as:

<?php
$lines = array();
foreach ($array as $key => $value) {
    $lines[] = $key . ' = "' . $value . '"';
}
$str = '(' . explode(',', $lines) . ')';
?>
 [2016-12-01 13:33 UTC] cmb@php.net
-Status: Open +Status: Suspended -Package: Arrays related +Package: Scripting Engine problem
 [2016-12-01 13:33 UTC] cmb@php.net 
Anyhow, this change would require the RFC process[1], so I'm suspending this feature request for the time being. Note that there had been a similar RFC[2], which had been declined.

[1] <https://wiki.php.net/rfc/howto>
[2] <https://wiki.php.net/rfc/loop_or>
 
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