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rsort (PHP 3, PHP 4, PHP 5) rsort -- Sortuj tablicę w porządku odwrotnym Opisvoid rsort ( array &tablica [, int flagi] )
Ta funkcja sortuje tablicę w porządku odwrotnym (od największego do
najmniejszego).
Zwraca TRUE w przypadku sukcesu, FALSE w
przypadku porażki.
Przykład 1. Przykład użycia rsort() |
<?php
$owoce = array("cytryna", "pomarańcza", "banan", "jabłko");
rsort($owoce);
reset($owoce);
while (list($key, $val) = each($owoce)) {
echo "$key = $val\n";
}
?>
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Powyższy przykład wyświetli: 0 = pomarańcza
1 = jabłko
2 = cytryna
3 = banan |
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Owoce zostały posortowane w odwrotnym porządku alfabetycznym.
Możesz zmodyfikować zachowanie sortowania przez użycie opcjonalnego
parametru flagi. Aby uzyskać szczegóły zobacz
sort().
Patrz także: arsort(),
asort(), ksort(),
sort() i usort().
User Contributed NotesAlex M
28-Jun-2005 04:39
A cleaner (I think) way to sort a list of files into reversed order based on their modification date.
<?php
$path = $_SERVER[DOCUMENT_ROOT]."/files/";
$dh = @opendir($path);
while (false !== ($file=readdir($dh)))
{
if (substr($file,0,1)!=".")
$files[]=array(filemtime($path.$file),$file); }
closedir($dh);
if ($files)
{
rsort($files); foreach ($files as $file)
echo "$file[0] $file[1]<br>\n"; }
?>
pshirkey at boosthardware dot com
14-Jan-2005 10:06
I needed a function that would sort a list of files into reversed order based on their modification date.
Here's what I came up with:
function display_content($dir,$ext){
$f = array();
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($folder = readdir($dh)) !== false) {
if (preg_match("/\s*$ext$/", $folder)) {
$fullpath = "$dir/$folder";
$mtime = filemtime ($fullpath);
$ff = array($mtime => $fullpath);
$f = array_merge($f, $ff);
}
}
rsort($f, SORT_NUMERIC);
while (list($key, $val) = each($f)) {
$fcontents = file($val, "r");
while (list($key, $val) = each($fcontents))
echo "$val\n";
}
}
}
closedir($dh);
}
Call it like so:
display_content("folder","extension");
ray at non-aol dot com
02-Nov-2004 04:49
Like sort(), rsort() assigns new keys for the elements in array. It will remove any existing keys you may have assigned, rather than just reordering the keys. This means that it will destroy associative keys.
$animals = array("dog"=>"large", "cat"=>"medium", "mouse"=>"small");
print_r($animals);
//Array ( [dog] => large [cat] => medium [mouse] => small )
rsort($animals);
print_r($animals);
//Array ( [0] => small [1] => medium [2] => large )
Use KSORT() or KRSORT() to preserve associative keys.
rnk-php at kleckner dot net
17-Jun-2003 09:37
Apparently rsort does not put arrays with one value back to zero. If you have an array like: $tmp = array(9 => 'asdf') and then rsort it, $tmp[0] is empty and $tmp[9] stays as is.
slevy1 at pipeline dot com
13-Jun-2001 08:15
I thought rsort was working successfully or on a multi-dimensional array of strings that had first been sorted with usort(). But, I noticed today that the array was only partially in descending order. I tried array_reverse on it and that seems to have solved things.
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