<?php

function ech($arr, $ke=NULL)
{
	foreach($arr as $key => $value)
	if (!is_array($value))
	{
		$test = explode(" ",$ke);
		print_r($test);
		array_pop($test);
		$ke = implode(" ",$test);
		echo "arr $ke $key = $value \r\n";
	}
	else
	{
		$ke = "$ke ".$key;
		ech($value, $ke);
	}
}


$a = array(
	'key' => 'value',
	'key1' =>array(
		'key11' => 'value11',
		'key12' => 'value12',
		'key13' => array(
			'key131' => 'value131',
			'key132' => 'value132')),
	'key2' => 'value2'
	);
	
ech($a);

?>