PHP：配列操作：high番目をlow番目に繰り上げる

$aaa = array();
$aaa[0]["color"] = "red";
$aaa[0]["image"] = "apple";

$aaa[1]["color"] = "blue";
$aaa[1]["image"] = "nasubi";

$aaa[2]["color"] = "green";
$aaa[2]["image"] = "hourensou";

$aaa[3]["color"] = "yellow";
$aaa[3]["image"] = "lemon";



print_r( $aaa ) ;
print "<br />";

$aaa = KuriageArray ( $aaa , 3,1);

print_r( $aaa ) ;
print "<br />";



function KuriageArray( $ary_input, $high, $low ) {
 //high番目をlowに移動して、それ以下の順番を繰り下げる
 //(降格・繰り下げはできない。すなわちhigh>=low)

 $num_input = count ( $ary_input );
 $ary_output = array();
  
  for ($ixx = 0; $ixx < $low  ; $ixx++) {
   $ary_output [$ixx] = $ary_input [$ixx] ;
  }
  
  $ary_output [$low] = $ary_input [$high] ;
  
  for ($ixx = $low + 1 ; $ixx < $high+1  ; $ixx++) {
   $ary_output [$ixx] = $ary_input [$ixx - 1] ;
  }
  for ($ixx = $high + 1 ; $ixx < $num_input  ; $ixx++) {
   $ary_output [$ixx] = $ary_input [$ixx ] ;
  }
  
 return $ary_output;

}

↓出力---------------------------
Array
(
[0] => Array
(
[color] => red
[image] => apple
)

[1] => Array
(
[color] => blue
[image] => nasubi
)

[2] => Array
(
[color] => green
[image] => hourensou
)

[3] => Array
(
[color] => yellow
[image] => lemon
)

)

Array
(
[0] => Array
(
[color] => red
[image] => apple
)

[1] => Array
(
[color] => yellow
[image] => lemon
)

[2] => Array
(
[color] => blue
[image] => nasubi
)

[3] => Array
(
[color] => green
[image] => hourensou
)

)


昇格、入替が、順位繰り下げができている。