Explode string by multiple delimiters into multi-dimensional array php - php

Question

Can someone please give me a hand making this explode function recursive? My head is not working today.
function expl($str,$charlist='|'){
$charlist = str_split($charlist);
foreach($charlist as $char){
if(is_array($str)){
for($i=0; $i<sizeof($str); $i++){
$str[$i] = expl($str[$i],$char);
}
}else{
return (explode($char,trim($str,$char)));
}
}
return($str);
}
echo "<pre>";
print_r(expl("A~a1~a2|B~b1~b2",'|~'));
echo "</pre>";
Should output:
Array
(
[0] => Array
(
[0] => A
[1] => a1
[2] => a2
)
[0] => Array
(
[0] => B
[1] => b1
[2] => b2
)
)

Answer 1

<?php
function expl($str, $charlist = '|')
{
if (!$charlist) {
return $str;
}
$char = $charlist[0];
$matrix = explode($char, $str);
for ($i = 0; $i < sizeof($matrix); $i++) {
$matrix[$i] = expl($matrix[$i], substr($charlist, 1));
}
return $matrix;
}
echo "<pre>";
print_r(expl("A~a1~a2|B~b1~b2", '|~'));
echo "</pre>";
that would be something like this...
use recursion!
the first level will get the first matrix, doing something like this
$matrix[0] = "A~a1~a2";
$matrix[1] = "B~b1~b2";
and then, the recursion will do the second part, which will make each string become the array of strings, that will become the array of strings until there's no more separators.

Answer 2

The below is a working example, and I've provided a link to show you the output when the function is run:
Example return:
http://phpfiddle.org/api/run/4iz-i2x
Usage:
echo '<pre>';
print_r( expl("A~a1~a2|B~b1~b2",'|~'));
echo '</pre>';
Function:
<?php
function expl($str,$charlist='|', $currentChar = 0, $continue = true){
if(!$continue)
{
return $str;
}
$endArray = array();
if($currentChar == 0){
$charlist = str_split($charlist);
}
else
{
if($currentChar > count($charlist))
{
return expl($str, $charlist, $currentChar, false);
}
}
if(!is_array($str))
{
$pieces = explode($charlist[$currentChar], $str);
$currentChar++;
return expl($pieces, $charlist, $currentChar);
}
else{
foreach($str as $arrayItem){
if(is_array($arrayItem))
{
return expl($str, $charlist, $currentChar, false);
}
$endArray[] = explode($charlist[$currentChar], $arrayItem);
}
$currentChar++;
return expl($endArray, $charlist, $currentChar);
}
}
?>

Answer 3

Simply do like this.First explode by '|' then by '~'. it should be something like this:
$str="A~a1~a2|B~b1~b2";
$arr=explode("|",$str);
$result=array();
foreach($arr as $k=>$v)
{
$arr1=explode("~",$v);
$result[]=$arr1;
}