Splitting get parameters by two delimiters

split-by.php

<?php

function getParamSplitBy($param, $delimiter='~', $subDelimiter=':')
{
    $paramChunks = array_chunk(preg_split('/('.$delimiter.'|'.$subDelimiter.')/', urldecode($this->getParam($param))), 2);
    $keys = array_column($paramChunks, 0);
    $unpaddedValues = array_column($paramChunks, 1);
    $keyCount = count($keys);
    $unpaddedCount = count($unpaddedValues);
    $values = ($keyCount > count($unpaddedCount)) ?
        array_pad($unpaddedValues, $keyCount, '') :
        $unpaddedValues;
    $paramPairs = array_combine($keys, $values);
    return $paramPairs;
}