PHP - formatting of unary operators adds extra space

<?php

$noSpace++;
$spaces   ++;
$afterIndexNoSpace[ 1 ]++;
$afterIndexSpaces[ 1 ]   ++;

++$noSpace;
++   $spaces;
++  $afterIndex[ 1 ];

<?php

$noSpace++; // OK
$spaces ++; // Still one space left
$afterIndexNoSpace[ 1 ] ++; // Space is added before ++
$afterIndexSpaces[ 1 ] ++; // Still one space left before ++

++$noSpace;
++$spaces;
++$afterIndex[ 1 ];

<?php

$noSpace++;
$spaces++;
$afterIndexNoSpace[ 1 ]++;
$afterIndexSpaces[ 1 ]++;

++$noSpace;
++$spaces;
++$afterIndex[ 1 ];