I have this array
$a = Array("a","b","c","d");
I want to rotate b, c, d. That is, B is placed where d and the position is lowered.
Example:
abcd
acdb
adbc
I've been here for the moment.
$a = Array("a","b","c","d");
print_r($a);
$num = count($a)-1;
for($j=0;$j<3;$j++){
for($i = $num; $i>=1;$i--){
if($i>1){
$aux = $a[$i-1];
$a[$i-1] = $a[$i];
print_r($a);
}
}
}
Even though the partner solution works, I think it would be much more optimal and simple to do it in the following way without using nested loops that are always a bad idea.
<?php
$a = Array("a","b","c","d");
// extraemos el elemento
$corte = array_splice ( $a, 1, 1 );
// añadimos el elemento al final
array_push ( $a, $corte[0] );
print_r ( $a );
// Array ( [0] => a [1] => c [2] => d [3] => b )
Reordering your code a bit so it should be worth it.
$a = Array("a","b","c","d");
print_r($a);
$num = count($a);
for($i=1;$i<$num-1;$i++){
$aux = $a[1];
for($j=1;$j<$num-1;$j++){
$a[$j] = $a[$j+1];
}
$a[$num-1] = $aux;
print_r($a);
}
Exit:
Array
(
[0] => a
[1] => b
[2] => c
[3] => d
)
Array
(
[0] => a
[1] => c
[2] => d
[3] => b
)
Array
(
[0] => a
[1] => d
[2] => b
[3] => c
)