PHP Challenge

<?php

/*
    PHP Challenge

    by Jefrey S. Santos <jefrey[at]jefrey.ml>

    The purpose is to write a PHP code that produces the following output:

*       *
 *     *
  *   *
   * *
    *
   * *
  *   *
 *     *
*       *

    Simple, huh? But there are some rules...
    - You can't use more than one loop (for, while...)
    - You can't use more than one echo (or print, printf...)
    - You can't cause any PHP error of any kind
    - You can't use more than one LINE 3:)
*/

/*
    An approach to draw that figure in standard PHP,
    without following the rules,
    could be like this.
*/

for($i = 0; $i <= 9; $i++) {
    if($i<5) {
        if($i) echo str_repeat(" ", $i);
        echo "*";
        if(9-2-$i*2>=0) echo str_repeat(" ", 9-2-$i*2);
        if($i!=4) echo "*\n";
        else echo "\n";
    } else {
        if($i>5) {
            if(9-$i) echo str_repeat(" ", 9-$i);
            echo "*";
            if(9-2-((9-$i)*2)>=0) echo str_repeat(" ", 9-2-((9-$i)*2));
            if(9-$i!=5) echo "*\n";
            else echo "\n";
        }
    }
}

echo "\n\n\n\n\n\n\n"; // this is not part of the answer code

/*
    However, we've put plenty of echoes,
    and we are limited just to 1 echo.
    We could tokenize our script using ternary operators
    instead of if and elses, and use only one main echo.
*/

for($i = 0; $i <= 9; $i++)  echo (
    $i < 5 ? (
        ($i ? str_repeat(" ", $i) : null).
        "*".
        (9-2-$i*2>=0 ? str_repeat(" ", 9-2-$i*2) : null).
        ($i!=4 ? "*\n"
        : "\n")
    ) : (
        ($i>5 ?
            (9-$i ? str_repeat(" ", 9-$i) : null).
            "*".
            (9-2-((9-$i)*2)>=0 ? str_repeat(" ", 9-2-((9-$i)*2)) : null).
            (9-$i!=5 ? "*\n"
            : "\n")
        : null)
    )
);

echo "\n\n\n\n\n\n\n"; // this is not part of the answer code

/*
    I know the code above seems to be some different programming
    language rather than PHP (almost a brainf*ck), but it's valid PHP.
    As we just used one command inside the for, and it's just an echo,
    it's valid if we remove line breaks and tabs without looking like
    minifying or forcing the code to be in one line.
    In other words, it looks like this:
        if($foo) echo "hey";
    And not like this:
        if($foo) { echo "hey"; }
*/
for($i = 0; $i <= 9; $i++) echo ($i < 5 ? (($i ? str_repeat(" ", $i) : null)."*".(9-2-$i*2>=0 ? str_repeat(" ", 9-2-$i*2) : null).($i!=4 ? "*\n": "\n")) : (($i>5 ? (9-$i ? str_repeat(" ", 9-$i) : null)."*".(9-2-((9-$i)*2)>=0 ? str_repeat(" ", 9-2-((9-$i)*2)) : null).(9-$i!=5 ? "*\n": "\n"): null)));