我希望在php中使用for循环以下输出

I want to display the output as like this

1        1
12      21
123    321
1234  4321
1234554321

Here is my php code

  for($i=1;$i <= 5;$i++)
{
    for($j=1;$j<=$i;$j++)
    {
    // print the result 
     echo "$j";


    }
    for($y=$i;$y<=$i;$y++)
    {
      echo '&nbsp;&nbsp;';
    }
    for($k=$i;$k>=1;$k--)
     {

    // print the result 
      echo "&nbsp;$k";}

    echo "<br/>";
}

But I got the output like this

1   1
12   2 1
123   3 2 1
1234   4 3 2 1
12345   5 4 3 2 1

Please help me get an output like above.

try

for($i=1;$i <= 5;$i++) {
    for($j=1;$j<=$i;$j++) {
      echo "$j";
    }
    for($y=0;$y<(5-$i)*4;$y++) {
      echo '&nbsp;';
    }
    for($l=$i;$l>0;$l--) {
      echo "$l";
    }
    echo "<br/>";
}

output:-

1        1
12      21
123    321
1234  4321
1234554321

For browser view :- for($y=0;$y<(5-$i)*4;$y++) else correct way to going is for($y=0;$y<(5-$i)*2;$y++)

Did you ever here about the PHP functions str_repeat and range?

http://php.net/manual/en/function.str-repeat.php. http://php.net/manual/en/function.range.php

With it you can print your &nbsp; character like this:

echo str_repeat('&nbsp;', (5 -$i) *4);

Complete code

$count = 5; // count oft rows and oft iterated numbers

for ($i = 1; $i <= $count; $i++) {
    echo implode('', range(1, $i));
    echo str_repeat('&nbsp;', ($count -$i) *4);
    echo implode('', array_reverse(range(1, $i)));
    echo '<br />';
}

How about this?

for($i=1;$i<=5;$i++){
   echo substr("12345", 0, $i);
   echo str_repeat(5-$i, '&nbsp;');
   echo str_reverse(substr("12345", 0, $i));
   echo '<br>';
}

Try this:

  for($i=1;$i <= 5;$i++)
  {
    for($j=1;$j<=$i;$j++)
    {
     echo "$j";
    }

    for($y=1;$y<=10-(2*$i);$y++)
    {
      echo '&nbsp;';
    }

    for($k=$i;$k>=1;$k--)
    {
     // print the result 
      echo "$k";
    }

    echo "<br/>";
  }

OUTPUT:

1        1
12      21
123    321
1234  4321
1234554321

How about this with $y<= 2 * (5 - i),

for($i=1;$i <= 5;$i++) {

    for($j=1;$j<=$i;$j++) {
       echo "$j";
    }

    for($y=1;$y<= 2 * (5 - i); $y++) {
       echo '&nbsp;';
    }

    for($k=$i;$k>=1;$k--) {
       echo "$k";
    }

   echo "<br/>";
}

for ($counter=1;$counter<= 5;$conter++)
{
   for ($j=1;$j<=$counter;$j++)
   {
       echo "$j";
   }

   for ($y=1;$y<=10-(2*$counter);$y++)
   {
       echo '&nbsp;';
   }

   for ($k=$counter;$k>=1;$k--)
   {
       echo "$k";
   }
   echo "<br/>";
}