- rtrim: documentation ( source)
<?php
$data_array = array('root1' => array(1,2,3),
'root2' => array(3,4,5));
$out = '';
foreach ($data_array as $key => $value)
{
$out.= $key.'=>[';
$count = count($value);
foreach ($value as $val) {
$out.=$val.',';
}
$out = rtrim($out, "<br />,");
$out.= '],<br />';
}
$out = rtrim($out,',');
echo $out;