ArrayObject::ksort
Sort the entries by key.
<?php
void public ArrayObject::ksort ( void )
?>
ATTENTION
This function sorts the entries by key, maintaining key to entry correlations.
This is used mainly when sorting associative arrays.
EXERCISE
<?php
$Dwarfs = [ 1 => 'Bashful', 2 => 'Doc',
3 => 'Grumpy', 4 => 'Happy',
5 => 'Sneezy', 6 => 'Sleepy', 7 => 'Dopey'];
$dwArrayObject = new ArrayObject($Dwarfs);
$dwArrayObject->ksort();
foreach($dwArrayObject as $dw => $dwc)
{
echo '[ ' . $dw . ' ] - ';
var_dump($dw, $dwc);
echo '<br><br>';
}
?>
RESULT
[ 1 ] - int(1) string(7) "Bashful"
[ 2 ] - int(2) string(3) "Doc"
[ 3 ] - int(3) string(6) "Grumpy"
[ 4 ] - int(4) string(5) "Happy"
[ 5 ] - int(5) string(6) "Sneezy"
[ 6 ] - int(6) string(6) "Sleepy"
[ 7 ] - int(7) string(5) "Dopey"
EXERCISE
<?php
$Ellayers = [ 'K' => 2, 'L' => 8, 'M' => 18, 'N' => 32, 'O' => 32, 'P' => 18, 'Q' => 8];
$elArrayObject = new ArrayObject($Ellayers);
$elArrayObject->ksort();
foreach($elArrayObject as $el => $elc)
{
echo '[ ' . $el . ' ] - ';
var_dump($el, $elc);
echo '<br><br>';
}
?>
RESULT
[ K ] - string(1) "K" int(2)
[ L ] - string(1) "L" int(8)
[ M ] - string(1) "M" int(18)
[ N ] - string(1) "N" int(32)"
[ O ] - string(1) "O" int(32)
[ P ] - string(1) "P" int(18)
[ Q ] - string(1) "Q" int(8)
EXERCISE
<?php
$Conts = [ 'c' => 299792458, 'G' => 6.67428E-11 ];
$ctArrayObject = new ArrayObject($Conts);
$ctArrayObject->ksort();
foreach($ctArrayObject as $ct => $ctc)
{
echo '[ ' . $ct . ' ] - ';
var_dump($ct, $ctc);
echo '<br><br>';
}
?>
RESULT
[ G ] - string(1) "G" float(6.67428E-11)
[ c ] - string(1) "c" int(299792458)
EXERCISE
<?php
$Cout_cont = [ "Countries" => [ 'BRA' => "Brasil", 'POR' => "Portugal", 'JPN' => "Japan" ],
"Continents" => ['SA' => "South America", 'EU' => "Europe", 'AS' => "Asia"]];
$ccArrayObject = new ArrayObject($Cout_cont);
$ccArrayObject->ksort();
foreach($ccArrayObject as $cc => $ccc)
{
echo '[ ' . $cc . ' ] - ';
var_dump($cc, $ccc);
echo '<br><br>';
}
?>
RESULT
[ Continents ] - string(10) "Continents" array(3) { ["SA"]=> string(13) "South America" ["EU"]=> string(6) "Europe" ["AS"]=> string(4) "Asia" }
[ Countries ] - string(9) "Countries" array(3) { ["BRA"]=> string(6) "Brasil" ["POR"]=> string(8) "Portugal" ["JPN"]=> string(5) "Japan" }
EXERCISE
<?php
$nmValues = [ 234, 130, 22, -12, 0.23456, 9.999 ];
$nmArrayObject = new ArrayObject($nmValues);
$nmArrayObject->ksort();
foreach($nmArrayObject as $nm => $nmc)
{
echo '[ ' . $nm . ' ] - ';
var_dump($nm, $nmc);
echo '<br><br>';
}
?>
RESULT
[ 0 ] - int(0) int(234)
[ 1 ] - int(1) int(130)
[ 2 ] - int(2) int(22)
[ 3 ] - int(3) int(-12)
[ 4 ] - int(4) float(0.23456)
[ 5 ] - int(5) float(9.999)
EXERCISE
<?php
$mvValues = [ 'two hundred thirty-four', 234,
'One hundred and thirty', 130,
'minus one hundred and twelve', -12,
'Nine point nine hundred and ninety nine', 9.999 ];
$mvArrayObject = new ArrayObject($mvValues);
$mvArrayObject->ksort();
foreach($mvArrayObject as $mv => $mvc)
{
echo '[ ' . $mv . ' ] - ';
var_dump($mv, $mvc);
echo '<br><br>';
}
?>
RESULT
[ 0 ] - int(0) string(23) "two hundred thirty-four"
[ 1 ] - int(1) int(234)
[ 2 ] - int(2) string(22) "One hundred and thirty"
[ 3 ] - int(3) int(130)
[ 4 ] - int(4) string(28) "minus one hundred and twelve"
[ 5 ] - int(5) int(-12)
[ 6 ] - int(6) string(39) "Nine point nine hundred and ninety nine"
[ 7 ] - int(7) float(9.999)
EXERCISE
<?php
$nvValues = [ 1 => 'two hundred thirty-four', 3 => 234,
2 => 'One hundred and thirty', 5 => 130,
4 => 'minus one hundred and twelve', 7 => -12,
8 => 'Nine point nine hundred and ninety nine', 6 => 9.999 ];
$nvArrayObject = new ArrayObject($nvValues);
$nvArrayObject->ksort();
foreach($nvArrayObject as $nv => $nvc)
{
echo '[ ' . $nv . ' ] - ';
var_dump($nv, $nvc);
echo '<br><br>';
}
?>
RESULT
[ 1 ] - int(1) string(23) "two hundred thirty-four"
[ 2 ] - int(2) string(22) "One hundred and thirty")
[ 3 ] - int(3) int(234)
[ 4 ] - int(4) string(28) "minus one hundred and twelve"
[ 5 ] - int(5) int(130)
[ 6 ] - int(6) float(9.999)
[ 7 ] - int(7) int(-12)
[ 8 ] - int(8) string(39) "Nine point nine hundred and ninety nine"
EXERCISE
<?php
$ovValues = [ 1, 2, 3, 3 => 'x', 6 => 'X', 4 => 'b', 5 => 'c', 7 => 'A' ];
$ovArrayObject = new ArrayObject($ovValues);
$ovArrayObject->ksort();
foreach($ovArrayObject as $ov => $ovc)
{
echo '[ ' . $ov . ' ] - ';
var_dump($ov, $ovc);
echo '<br><br>';
}
?>
RESULT
[ 0 ] - int(0) int(1)
[ 1 ] - int(1) int(2)
[ 2 ] - int(2) int(3)
[ 3 ] - int(3) string(1) "x"
[ 4 ] - int(4) string(1) "b"
[ 5 ] - int(5) string(1) "c"
[ 6 ] - int(6) string(1) "X"
[ 7 ] - int(7) string(1) "A"
EXERCISE
<?php
$otValues = [ 'one', 'two', 'three'];
$pvValues = [ 1, 2, 3, ...$otValues ];
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The Unpacking inside arrays:
...$otValues,
was introduced in PHP 7.4.0
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
$pvArrayObject = new ArrayObject($pvValues);
$pvArrayObject->ksort();
foreach($pvArrayObject as $pv => $pvc)
{
echo '[ ' . $pv . ' ] - ';
var_dump($pv, $pvc);
echo '<br><br>';
}
?>
RESULT
[ 0 ] - int(0) int(1)
[ 1 ] - int(1) int(2)
[ 2 ] - int(2) int(3)
[ 3 ] - int(3) string(3) "one"
[ 4 ] - int(4) string(3) "two"
[ 5 ] - int(5) string(5) "three"