PHP prints a solid and hollow shape with a side length of n

PHP Prints a solid and hollow shape with a side length of n

Calculation method for solid type of diamond:

$n: Edge Length
$i: Current line, 0 start
$rows: Total number of rows

Upper
Number of spaces in front = $n-$i-1
Number of characters = $i *2+1
Lower
Number of spaces in front = $i-$n +1
Number of characters = ($rows-$i) *2-1

Use Str_pad to reduce loops such as For/while

/** * Print solid diamond type * @param  int    $n edge length, default 5 * @param  string $s the character displayed, default * * @return string */function soliddiamond ($n = 5, $s = ' * ') {    $str = ';    Calculates the total number of rows    $rows = $n *2-1;    Loop calculates * for    ($i =0; $i < $rows, $i + +) {        if ($i < $n) {//upper            $str. = Str_pad (", ($n-$i-1),"). Str_pad (" , $i *2+1, $s). " \ r \ n ";        } else{     //Lower            $str. = Str_pad (', ($i-$n + 1), '). Str_pad (", ($rows-$i) *2-1, $s). "\ r \ n";        }    }    return $STR;} Echo '
 
  
   
  &amp;amp; #39;; Echo Soliddiamond (5); Echo &amp;amp; #39;
 
  ';

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

The calculation method of hollow type of diamond:
$n: Edge Length
$i: Current line, 0 start
$rows: Total number of rows
Upper
Number of spaces in front = $n-$i-1
Number of empty spaces = $i *2+1-2
Number of characters = $i *2+1-The number of empty spaces
Lower
Number of spaces in front = $i-$n +1
Number of empty spaces = ($rows-$i) *2-1-2
Number of characters = ($rows-$i) *2-1-the number of empty spaces

/** * Print Hollow type * @param  int    $n edge length, default 5 * @param  string $s displayed characters, default * * @return string */function hollowdiamond ($n =5, $s = ' * ') {    $str = ';    Calculates the total number of rows    $rows = $n *2-1;    Loop calculates * for    ($i =0; $i < $rows, $i + +) {        if ($i < $n) {//upper            $tmp = $i *2+1            ) per line; $str. = Str_pad (", ($n-$i-1),"). Str_pad (Str_pad (", $tmp-2," ', Str_pad_both), $tmp, $s, str_pad_both). " \ r \ n ";        } else{     //Lower            $tmp = ($rows-$i) *2-1;            $str. = Str_pad (", ($i-$n + 1),"). Str_pad (Str_pad (", $tmp-2, '", Str_pad_both), $tmp, $s, str_pad_both). "\ r \ n";        }    }    return $STR;} Echo '
 
  
   
  &amp;amp; #39;; Echo Hollowdiamond (5); Echo &amp;amp; #39;
 
  ';

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

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