Nützliche Funktionen zur Arbeit mit Array

array.functions.php

<?php

//check if an array is associative
function isAssocArray($array){
	return array_keys($array) !== range(0, count($array) - 1);
}


//check if an array is multidimensional
function isMultiArray($array) {
    return ((count($array) != count($array, 1)) ? true : false);
}


//check if a value is in array
function arrayHasValue ($array, $value) {
	return (in_array($value, $array) ? true : false);
}


//check if a key is in array
function arrayHasKey ($array, $key) {
	return (array_key_exists($key, $array) ? true : false);
}


//add single value
function addValue($array, $value, $key = NULL){
	if(!is_null($key)) {
		$array[$key] = $value;
	} else {
		$array[] = $value;			
	}	
	return $array;
}


//add array
function addArray($array, $new_array){
	return(array_merge($array, $new_array));
}


//delete value by value
function deleteByValue($array, $values)
{	
	if(is_array($values)) {
		return(array_diff($array, $values));	
	} else {
		return(array_diff($array, array($values)));	
	}
	
}

//delete value by key
function deleteByKey($array, $keys)
{	
	if(is_array($keys)) {
		
		foreach ($keys as $key) {
			unset($array[$key]);
		}
		return($array);
		
	} else {
		unset($array[$keys]);
		return($array);
	}
	
}


// get value by key
function getValueByKey($array, $key)
{
	return array_key_exists($key, $array) ? $array[$key] : null;
}

// get key by value
function getKeyByValue($array, $value) {
    return array_search($value, $array);
}

// list values as html list
function listValues($array, $class = NULL) {
    return("<ul class='{$class}'><li>".implode("</li><li>",$array)."</li></ul>");
}


//list keys as html list
function listKeys($array, $class = NULL) {
    return("<ul class='{$class}'><li>".implode("</li><li>",array_keys($array))."</li></ul>");
}


//create HTML definition list form assoc array
function defListArray($array, $class = NULL) {
	$list = "<dl class='{$class}'>";
	foreach ($array as $key => $value) {
		$list .= "<dt>{$key}</dt>";
		$list .= "<dd>{$value}</dd>";	
	}
	$list .= "</dl>";
	return($list);
}

// nested HTML list from two dimensional array
function nestedList ($array, $class = NULL) {
	$list = "<ul class='{$class}'>";
	foreach ($array as $key => $value) {
		$list .= "<li>{$key}";
		$list .= "<ul>";
		foreach($value as $data_key => $data_value) {
			$list .= "<li>{$data_key} - {$data_value}</li>";	
		}
		$list .= "</ul></li>";	
	}
	$list .= "</ul>";
	return($list);
}

//count array elements
function countArray($array) {
    return(count($array));
}

?>

array.functions_samples.php

<?php
$mein_array = array(); // Array initialisieren

// TRUE / FALSE Abfragen
//###############################

//Prüfen ob Array is Assoziativer
function isAssocArray($array){
	return array_keys($array) !== range(0, count($array) - 1);
}
$mein_array = array("DE" => "Deutschland", "EN" => "England");
echo (isAssocArray($mein_array) ? "isAssoc" : "false"); //gibt isAssoc aus

$mein_array = array("Deutschland", "England");
echo (isAssocArray($mein_array) ? "isAssoc" : "false"); //gibt false aus


//Prüfen ob Multidimensionaler Array
function isMultiArray($array) {
    return ((count($array) != count($array, 1)) ? true : false);
}
$mein_array = array("Deutschland", "England");
echo (isMultiArray($mein_array) ? "isMulti" : "false"); // gibt false aus

$mein_array = array("DE" => "Deutschland", "GB" => array("Schottland", "England", "Wales", "Nordirland"));
echo (isMultiArray($mein_array) ? "isMulti" : "false");  // gibt isMulti aus


//Prüfen ob Value in Array vorhanden ist
function arrayHasValue ($array, $value) {
	return (in_array($value, $array) ? true : false);
}
$mein_array = array("Deutschland", "England");
echo (arrayHasValue($mein_array, "Deutschland") ? "hasValue" : "noValue"); //gibt hasValue aus


//Prüfen ob Key in Array vorhanden ist
function arrayHasKey ($array, $key) {
	return (array_key_exists($key, $array) ? true : false);
}
$mein_array = array("DE" => "Deutschland", "EN" => "England");
echo (arrayHasKey($mein_array, "EN") ? "isKey" : "noKey"); //gibt isKey aus



// Array Werte hinzufügen/löschen 
//###############################

//Einzelnen Wert hinzufügen
function addValue($array, $value, $key = NULL){
	if(!is_null($key)) {
		$array[$key] = $value;
	} else {
		$array[] = $value;			
	}	
	return $array;
}

$mein_array = array("Deutschland", "England");
$mein_array = addValue($mein_array, "Kanada");
print_r($mein_array); 

$mein_array = array("DE" => "Deutschland", "EN" => "England");
$mein_array = addValue($mein_array, "Kanada", "CA");
$mein_array = addValue($mein_array, "Schweiz", "CH");
print_r($mein_array);


//Mehrere Werte in als Array hinzufügen
$mein_array = array("DE" => "Deutschland", "EN" => "England");
$new_array = array("CA" => "Kanada", "CH" => "Schweiz");
function addArray($array, $new_array){
	return(array_merge($array, $new_array));
}
print_r(addArray($mein_array, $new_array));


//Elemente via Value aus Array löschen
function deleteByValue($array, $values)
{	
	if(is_array($values)) {
		return(array_diff($array, $values));	
	} else {
		return(array_diff($array, array($values)));	
	}
	
}
$array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
$del_array = array("DE" => "Deutschland","CH" => "Schweiz");
print_r(deleteByValue($array, $del_array));

$array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
$value = "England";
print_r(deleteByValue($array, $value));


function deleteByKey($array, $keys)
{	
	if(is_array($keys)) {
		
		foreach ($keys as $key) {
			unset($array[$key]);
		}
		return($array);
		
	} else {
		unset($array[$keys]);
		return($array);
	}
	
}

$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
$key_array = array("CH", "CA");
print_r(deleteByKey($mein_array, $key_array));

$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
$del_key = "CA";
print_r(deleteByKey($mein_array, $del_key));

// Array Werte ausgeben 
//###############################

// Value zu bestimmten Key ausgeben
function getValueByKey($array, $key)
{
	return array_key_exists($key, $array) ? $array[$key] : null;
}
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
echo getValueByKey($mein_array, "CA");

// get key by value
function getKeyByValue($array, $value) {
    return array_search($value, $array);
}
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
echo getKeyByValue($mein_array, "Schweiz");

// HTML Liste aus Array Values
function listValues($array, $class = NULL) {
    return("<ul class='{$class}'><li>".implode("</li><li>",$array)."</li></ul>");
}
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
echo listValues($mein_array);

//HTML Liste aus Array Keys
function listKeys($array, $class = NULL) {
    return("<ul class='{$class}'><li>".implode("</li><li>",array_keys($array))."</li></ul>");
}
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
echo listKeys($mein_array, "inline");


//Definition Liste inkl. Keys und Values
function defListArray($array, $class = NULL) {
	$list = "<dl class='{$class}'>";
	foreach ($array as $key => $value) {
		$list .= "<dt>{$key}</dt>";
		$list .= "<dd>{$value}</dd>";	
	}
	$list .= "</dl>";
	return($list);
}
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
echo defListArray($mein_array);

// Verschachtelte HTML Liste für zweidimensionale assoc Arrays
function nestedList ($array, $class = NULL) {
	$list = "<ul class='{$class}'>";
	foreach ($array as $key => $value) {
		$list .= "<li>{$key}";
		$list .= "<ul>";
		foreach($value as $data_key => $data_value) {
			$list .= "<li>{$data_key} - {$data_value}</li>";	
		}
		$list .= "</ul></li>";	
	}
	$list .= "</ul>";
	return($list);
}

$mein_array = array(
   "England" => array(
		"Code" 	=> "EN",
		"Capital" 	=> "London",
		"Currency" 	=> "Pfund",
		"Continent" => "Europoa",
		"Language" 	=> "Englisch"
		 ),
   "Deutschland" => array(
		"Code" 	=> "DE",
		"Capital" 	=> "Berlin",
		"Currency" 	=> "Euro",
		"Continent" => "Europoa",
		"Language" 	=> "Deutsch"
		),
   "Kanada" => array(
		"Code" 	=> "CA",
		"Capital" 	=> "Ottawa",
		"Currency" 	=> "Kanad. Dollar",
		"Continent" => "Nordamerika",
		"Language" 	=> "englisch"
		 )			                
);
echo nestedList($mein_array); 


//Elemente im Array Zählen
$mein_array = array("DE" => "Deutschland","EN" => "England","CA" => "Kanada","CH" => "Schweiz");
function countArray($array) {
    return(count($array));
}
echo countArray($mein_array);
?>