展平这个数组堆栈 PHP

Question

I'm trying to find a way to flatten this array

I'm outputting a sha1 conversion but I wish to break it into 4 parts of 10

then change its order before saving it.

here is my code so far.

 <?php $hash = bin2hex(random_bytes(5)); $randomhash = sha1($hash); $parts = str_split($randomhash, 10); $newar = $parts[3].$parts.[1].$parts.[2].$parts[0]; $hashflat = implode(" ",$newar); echo $hashflat;

However, this does not work as desired. Is there a simple way to implode

$parts[3] $parts [1] $parts [2] $parts[0]

in this order to a flat output?

Answer 1

$newar will already be as you want it, assuming you want it as a string.

However, you want spaces so it'll be:

$hash = bin2hex(random_bytes(5));
$randomhash = sha1($hash);
$parts = str_split($randomhash, 10);
$newar = $parts[3]." ".$parts[1]." ".$parts[2]." ".$parts[0];

this will return it as a string with spaces rather than an array. if you want it as a reordered array it's

$hash = bin2hex(random_bytes(5));
$randomhash = sha1($hash);
$parts = str_split($randomhash, 10);
$newar = array($parts[3],$parts[1],$parts[2],$parts[0]);

Answer 2

$newar = array($parts[3],$parts[1],$parts[2],$parts[0]);

setting a new array seemed to work in this case for me.

not sure if this is the correct way of doing things though.