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<?php
/**
* @version $Id$
* @package Koowa_Helper
* @subpackage Array
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
* @link http://www.nooku.org
*/
/**
* Array helper
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Helper
* @subpackage Array
* @static
*/
class KHelperArray
{
/**
* Typecast each element of the array. Recursive (optional)
*
* @param array Array to typecast
* @param string Type (boolean|int|float|string|array|object|null)
* @param boolean Recursive
* @return array
*/
public static function settype(array $array, $type, $recursive = true)
{
foreach($array as $k => $v)
{
if($recursive && is_array($v)) {
$array[$k] = self::settype($v, $type, $recursive);
} else {
settype($array[$k], $type);
}
}
return $array;
}
/**
* Count array items recursively
*
* @param array
* @return int
*/
public static function count(array $array)
{
$count = 0;
foreach($array as $v){
if(is_array($v)){
$count += self::count($v);
} else {
$count++;
}
}
return $count;
}
/**
* Merge two arrays recursively
*
* Matching keys' values in the second array overwrite those in the first array, as is the
* case with array_merge, i.e.:
*
* KHelperArray::merge(array('key' => 'org value'), array('key' => 'new value'));
* => array('key' => array('new value'));
*
* Parameters are passed by reference, though only for performance reasons. They're not
* altered by this function and the datatypes of the values in the arrays are unchanged.
*
* @param array
* @param array
* @return array An array of values resulted from merging the arguments together.
*/
public static function merge( array &$array1, array &$array2 )
{
$args = func_get_args();
$merged = array_shift($args);
foreach($args as $array)
{
foreach ( $array as $key => &$value )
{
if ( is_array ( $value ) && isset ( $merged [$key] ) && is_array ( $merged [$key] ) ){
$merged [$key] = self::merge ( $merged [$key], $value );
} else {
$merged [$key] = $value;
}
}
}
return $merged;
}
/**
* Extracts a column from an array of arrays or objects
*
* @param array List of arrays or objects
* @param string The index of the column or name of object property
* @return array Column of values from the source array
*/
public static function getColumn(array $array, $index)
{
$result = array();
foreach($array as $k => $v)
{
if(is_object($v)) {
$result[$k] = $v->$index;
} else {
$result[$k] = $v[$index];
}
}
return $result;
}
/**
* Utility function to map an array to a string
*
* @static
* @param array|object The array or object to transform into a string
* @param string The inner glue to use, default '='
* @param string The outer glue to use, default ' '
* @param boolean
* @return string The string mapped from the given array
*/
public static function toString($array = null, $inner_glue = '=', $outer_glue = ' ', $keepOuterKey = false)
{
$output = array();
if($array instanceof KConfig)
{
$data = array();
foreach($array as $key => $item)
{
$data[$key] = (string) $item;
}
$array = $data;
}
if(is_object($array)) {
$array = (array) KConfig::unbox($array);
}
if(is_array($array))
{
foreach($array as $key => $item)
{
if(is_array($item))
{
if($keepOuterKey) {
$output[] = $key;
}
// This is value is an array, go and do it again!
$output[] = KHelperArray::toString($item, $inner_glue, $outer_glue, $keepOuterKey);
}
else $output[] = $key.$inner_glue.'"'.str_replace('"', '"', $item).'"';
}
}
return implode($outer_glue, $output);
}
}
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