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ArrayUtil.php
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ArrayUtil.php
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<?php
class ArrayUtil
{
/**
* take an array and split into the given number of arrays with equal number of elements
* if an uneven number of elements one (or more) arrays may have more elements then the others
*
* @param array The array we want to split
* @param int The number of sections we want
* @return array The resulting split array
*/
public static function splitArray($array, $sections)
{
if(count($array) < $sections) {
$chunkSize = 1;
} else {
$chunkSize = (count($array) / $sections);
}
return array_chunk($array, $chunkSize, true);
}
/**
* Add new elements to the given array after the element with the supplied key
*
* @param array The array we want to add to
* @param string|int The key we wish to add our new elements after.
* @param array The elements we wish to add
* @return array The resulting array with new elements
*/
public static function addAfter($array, $key, $new_elements)
{
$offset = self::getOffsetByKey($array, $key);
if ($offset >= 0) {
// increment cause we want to actually splice in from the element AFTER the one we found
$offset++;
// get the slice, and insert the new elements and rebuild the array
$array_items = array_splice($array, $offset);
$new_elements += $array_items;
$array += $new_elements;
}
return $array;
}
/**
* get the offset of an element within an array based on the key
* useful for associative arrays
*
* @param array The containing array
* @param string The key to search for
* @return int|null The offset within an array | null if not found
*/
public static function getOffsetByKey($array, $needle)
{
$offset = 0;
foreach ($array as $key => $value) {
if ($key === $needle) {
return $offset;
}
$offset++;
}
return null;
}
/**
* get the offset of an element within an array based on the element value
* useful for associative arrays
*
* @param array The containing array
* @param string The value to search for
* @return int|null The offset within an array | null if not found
*/
public static function getOffsetByValue($array, $needle)
{
$offset = 0;
foreach ($array as $key => $value) {
if ($value === $needle) {
return $offset;
}
$offset++;
}
return null;
}
}