<?php

$array = array(a,s,d,f,g,h,j,k,l);

foreach($array as $i => $a){
 unset($array[1]);
 echo $a . "\n";
}

print_r($array);

a
s
d
f
g
h
j
k
l
Array
(
    [0] => a
    [2] => d
    [3] => f
    [4] => g
    [5] => h
    [6] => j
    [7] => k
    [8] => l
)