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  1. <?php
  2. $array=array(0=>'a', 1=>'b', 2=>'c', 3=>'d');
  3.  
  4. print_r(move($array, 2, 'up'));
  5. print_r(move($array, 3, 'up'));
  6. print_r(move($array, 0, 'down'));
  7.  
  8. function move($array, $movingkey, $direction) {
  9. 	//Abbrechen, wenn der Key nicht exisiteiert
  10. 	if(!array_key_exists($movingkey, $array)) return $array;
  11.  
  12. 	$keys = array_keys($array);						//Schlüsel extrahieren
  13.  	$pos = array_search($movingkey, $keys);			//Position ermitteln
  14.  	unset($keys[$pos]);								//Schlüssel aus Array entfernen
  15.  	$offset = $direction=='up' ? $pos+1 : $pos-1;	//Offset berechnen
  16.  	if($offset > count($keys)) $offset=0;			//EndOf Korrektur
  17.  	if($offset < 0) $offset=count($keys);			//BeginOf Korrektur
  18.  	array_splice($keys, $offset, 0, $movingkey);	//Key an neuer Position einfügen
  19.  	$retArr = array();								
  20.  	foreach($keys as $key){							//Werte auf neue Positionen setzen
  21.  		$retArr[$key] = $array[$key];
  22.  	}
  23.  	$retArr = array_values($retArr);  				//Neu durchnummerieren
  24.  	return $retArr;
  25. }
  26. ?>
Success #stdin #stdout 0.01s 20568KB
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Standard input is empty
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Array
(
    [0] => a
    [1] => b
    [2] => d
    [3] => c
)
Array
(
    [0] => d
    [1] => a
    [2] => b
    [3] => c
)
Array
(
    [0] => b
    [1] => c
    [2] => d
    [3] => a
)
https://ideone.com/ca1U2h
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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