PHP realizes printing hollow diamond

This article mainly shares with you how to print hollow diamonds in PHP, mainly in the form of code. I hope it can help you.

<?php
	function star($num)
	{
		if($num>0)
		{
			
			for($i=0; $i<$num; $i++)
			{
				//左上
				if($i<1)
				{
					for($j=0; $j<($num-$i-1); $j++)
					{
						echo "　";
					}
					echo "*<br/><br/>";
				}
				else
				{
					
					for($j=0; $j<($num-$i-1); $j++)
					{
						echo " ";
					}
					echo "*";
					//右上
					for($j=0; $j<(2*$i-1); $j++)
					{
						echo "　";
					}
					echo "*<br/><br/>";
				}
	
			}
			
			for($i=1; $i<$num; $i++)
			{
				//左下
				if($i>0)
				{
					for($j=0; $j<$i; $j++)
					{
						echo "　";
					}
					echo "*";
				}
				//右下
				if($i>0 && $i<($num-1))
				{
					for($j=0; $j<2*($num-$i)-3; $j++)
					{
						echo "　";
					}
					echo "*<br/><br/>";
				}

			}
		}
	}
	star(3);
?>

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