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php输出金字塔的2种实现方法,php输出金字塔2种
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php输出金字塔的2种实现方法,php输出金字塔2种

Jun 13, 2016 am 09:18 AM
php method output

php输出金字塔的2种实现方法,php输出金字塔2种

本文实例讲述了php输出金字塔的2种实现方法。分享给大家供大家参考。具体分析如下:

下面给大家总结了两种实现金字塔打印的方法,一种是利用了自定义函数,另一种是利用了for循环了,其实两都用到了只是前者高级一些吧.

自定义函数实现金字塔,代码如下:

复制代码 代码如下:

/**
 * 金字塔
 * string fun_py(int $rows = 9, bool $sort=true)
 * $rows 表示行数 必须为整数 并且必须在1-20之间
 * $sort 表示排序 true表示正序 FALSE表示倒序
 */
function fun_py($rows = 9, $sort=true){
 if ($rows20){
  return "必须在1-20之间";
 }
 if($rows!=(int)($rows)){
  return '行数 必须为整数';
 }
 $str="";
 if($sort){
  for($i=1;$i    $str.= '
';
   for($j=1;$j     if($j==1){
     for($k=1;$k       $str.= ' ';
     }
    }
    $str.= '*'.' ';
   }
  }
 } else{
  for($i=$rows;$i>=1;$i--){
   $str.= '
';
   for($j=1;$j     if($j==1){
     for($k=1;$k       $str.= ' ';
     }
    }
    $str.= '*'.' ';
   }
  }
 }
 return $str;
}
echo fun_py(9,false);
?>


下面再实现个金字塔形状物,通用也是用到for循环,代码如下:

复制代码 代码如下:

/**
金字塔正序
**/
for($a=1;$a  for ($b=10;$b>=$a;$b--){
    echo " ";
  }
 for ($c=1;$c    echo "*"." ";
 }
 echo "
";
}
?>


同样想让这个金字塔倒立起来呢,代码如下:

复制代码 代码如下:

/**
金字塔玩倒立
**/
for($a=10;$a>=1;$a--){
 for ($b=10;$b>=$a;$b--){
    echo " ";
  }
 for ($c=1;$c    echo "*"." ";
 }
 echo "
";
}
?>

希望本文所述对大家的PHP程序设计有所帮助。

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