表示另一个数组中的数组产品的值

i have an array {

$e = Array ( [0] => 13 [1] => 11 [2] => 2 ) Array ( [989.32] => 13 [77] => 11 [0.99] =>2 );

and i want to multiply each key by their values respectively and use the values to create another array. Anyone know how? i've tried:

foreach($e as $y=>$z)
{$x= $y * $z;
$p=array();
array_push($p,$x);}
print_r($p);

but i got:

Array ( [0] => 1.98 )

One little change in your code:

$p=array();
foreach($e as $y=>$z)
{
$x= $y * $z;
array_push($p,$x);
}
print_r($p);

Try this :

$p=array();
foreach($e as $y=>$z){
   $x= $y * $z;
   array_push($p,$x);
}
print_r($p);

Put your $p=array(); out side the loop

I assume your array was multidimensional array. so try like this

$e = Array(Array ( "0" => 13 , "1" => 11 , "2" => 2 ), Array ( "989.32" => 13 , "77" => 11 , "0.99" => 2 ));
$result = array();
$i=0;
foreach($e as $values)
{
foreach($values as $key=>$value)
{
$result[$i]= $key * $value ;
$i++;
}
}

print_r($result);

Demo

Hope you will understand why:

<?php
    $e = array(...);
    $p = array();
    foreach ($e as $y => $z) {
        $x = $y * $z;
        array_push($p, $x);
    }

So as you can see, in your code, you overwrite $p each time so that you get the last multiplication 0.99 * 2 = 1.98