PHP Star patterns

$number = 5;
$space_n 		= $number*2;
$space = '  ';
$star = '*';
for($i = 1; $i <= $number; $i++)
{
	for($x=0; $x<$i; $x++)
	{
		echo $star;
	}
	for($y = 0; $y< $space_n-($i*2); $y++)
	{
		echo $space;
	}
	for($z=0; $z<$i; $z++)
	{
		echo $star;
	}
    echo '
';
}
*        *
**      **
***    ***
****  ****
**********

 
 
for($i=0; $i<5; $i++) {
for($j=0; $j<5; $j++)
{
echo '*';
}
echo '\n\r';
}
 

Output:
*****
*****
*****
*****
*****
 

for($i=1; $i<=5; $i++) {
for($j=1; $j<=$i; $j++)
{ echo '*'; }
  echo '\n\r';
}
* 
* * 
* * * 
* * * * 
* * * * * 

function pypart2($n)
{
 for ($i = 1; $i <= $n; $i++) {
  for ($j = 1; $j <= $n; $j++) {
   if($j<=($n-$i)){
    echo " "." ";
     
   }else {
    echo "* ";
   }
    
  }
  echo PHP_EOL;
 }
}
 
 // Driver Code
 $n = 5;
 pypart2($n);

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

function triangle($n)
{
  
 // number of spaces
 $k = 2 * $n - 2;
 
 // outer loop to handle
 // number of rows
 // n in this case
 for ($i = 0; $i < $n; $i++)
 {
   
  // inner loop to handle
  // number spaces
  // values changing acc.
  // to requirement
  for ($j = 0; $j < $k; $j++)
   echo " ";
 
  // decrementing k after
  // each loop
  $k = $k - 1;
 
  // inner loop to handle
  // number of columns
  // values changing acc.
  // to outer loop
  for ($j = 0; $j <= $i; $j++ )
  {
    
   // printing stars
   echo "* ";
  }
 
  // ending line after
  // each row
  echo "\n";
 }
}
 
 // Driver Code
 $n = 5;
 triangle($n);
    * 
   * * 
  * * * 
 * * * * 
* * * * * 

function triangle_pattern($len){
$string="*";
$pyramid_str="";
$mid_point=ceil($len/2);
for($i=1;$i<=$mid_point;$i++){
 for($j = 1; $j <= $i; ++$j) {
  $pyramid_str.=$string." ";
 }
 $pyramid_str.="\r\n";
}
 
for($i=$mid_point;$i>=1;$i--){
 for($j = 1; $j < $i; ++$j) {
  $pyramid_str.=$string." ";
 }
 $pyramid_str.="\r\n";
}
 
return $pyramid_str;
}
echo triangle_pattern(9);
* 
* * 
* * * 
* * * * 
* * * * * 
* * * * 
* * * 
* * 
* 

function numpat($n)
{
  
 // initialising starting
 // number
 $num = 1;
 
 // outer loop to handle
 // number of rows
 // n in this case
 for ($i = 0; $i < $n; $i++)
 {
   
  // inner loop to handle
  // number of columns
  // values changing acc.
  // to outer loop
  for ($j = 0; $j <= $i; $j++ )
  {
    
   // printing number
   echo $num." ";
 
   // incrementing number
   // at each column
   $num = $num + 1;
  }
 
  // ending line after
  // each row
  echo "\n";
 }
}
 
 // Driver Code
 $n = 5;
 numpat($n);

1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 

function alphapat($n)
{
  
 // initializing value
 // corresponding to 'A'
 // ASCII value
 $num = 65;
 
 // outer loop to handle
 // number of rows
 // n in this case
 for ($i = 0; $i < $n; $i++)
 {
   
  // inner loop to handle
  // number of columns
  // values changing acc.
  // to outer loop
  for ($j = 0; $j <= $i; $j++ )
  {
    
   // explicitly converting
   // to char
   $ch = chr($num);
 
   // printing char value
   echo $ch." ";
  }
 
  // incrementing number
  $num = $num + 1;
 
  // ending line after
  // each row
  echo "\n";
 }
}
 
 // Driver Code
 $n = 5;
 alphapat($n);

A 
B B 
C C C 
D D D D 
E E E E E 
  

function contalpha($n)
{
  
 // initializing value
 // corresponding to 'A'
 // ASCII value
 $num = 65;
 
 // outer loop to handle
 // number of rows
 // n in this case
 for ($i = 0; $i < $n; $i++)
 {
   
  // inner loop to handle
  // number of columns
  // values changing acc.
  // to outer loop
  for ($j = 0; $j <= $i; $j++ )
  {
    
   // explicitly converting
   // to char
   $ch = chr($num);
 
   // printing char value
   echo $ch." ";
 
   // incrementing number
   // at each column
   $num = $num + 1;
  }
 
  // ending line after each row
  echo "\n";
 }
}
 
 // Driver Code
 $n = 5;
 contalpha($n);
A 
B C 
D E F 
G H I J 
K L M N O