for relation array
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<?php
echo "Hello World\n";
$arr = array("a"=>"aaa","b"=>"bbb");
$len = sizeof($arr);
for($i=0;$i<$len;$i++){
echo key($arr)."=>";
echo current($arr)."\n";
next($arr);
}
echo "---------------------\n";
for(reset($arr);$k=key($arr),$v=current($arr);next($arr)){
echo $k.'=>'.$v."\n";
}
Php
INFO