php-associative-foreach-loop.php

<?php

$colors = array("0"=>"Red","1"=>"Green","2"=>"Blue");

echo "0th element of array is " . $colors["0"];
echo "<br>";
//looping
foreach ($colors as $key=>$value){
	echo "Key=".$key." value=".$value;
	echo "<br>";
}
?> 

php-associative-while-loop.php

<?php
$foo = array(
    1 => "Value1",
    2 => "Value2",
    10 => "Value10"
);
while($bar = each($foo)){
    echo $bar[0] . " => " . $bar[1];
}
?>