note 92301 added to function.current
| From: | ratfactor at gmail dot com | Date: | Sat, 18 Jul 2009 00:27:59 +0000 |
| Subject: | note 92301 added to function.current | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-158445@lists.php.net to get a copy of this message | ||
**Apologies. Please ignore or remove my previous note. This version allows for false values in the
array.**
In the rare need for look-ahead and look-behind ability while looping through an array, you can use
prev(), next() and current() like so:
<?php
$nums = array('a','b','c',false,'e', 'f');
for(reset($nums), $i=0; $n=current($nums), key($nums)!==null; next($nums), $i++){
// look behind
$behind=' ';
if($i>0){
$n=prev($nums);
$behind=$n;
$n=next($nums);
}
// look ahead
$ahead=' ';
next($nums);
if(key($nums)!==null){
$ahead=current($nums);
}
prev($nums);
echo "$i: $behind $n $ahead\n";
}
?>
Results:
0: a b
1: a b c
2: b c
3: c e
4: e f
5: e f
----
Server IP: 69.147.83.197
Probable Submitter: 24.251.157.169
----
Manual Page -- http://www.php.net/manual/en/function.current.php
Edit -- https://master.php.net/note/edit/92301
Del: integrated -- https://master.php.net/note/delete/92301/integrated
Del: useless -- https://master.php.net/note/delete/92301/useless
Del: bad code -- https://master.php.net/note/delete/92301/bad+code
Del: spam -- https://master.php.net/note/delete/92301/spam
Del: non-english -- https://master.php.net/note/delete/92301/non-english
Del: in docs -- https://master.php.net/note/delete/92301/in+docs
Del: other reasons-- https://master.php.net/note/delete/92301
Reject -- https://master.php.net/note/reject/92301
Search -- https://master.php.net/manage/user-notes.php