Home  >  Article  >  Backend Development  >  PHP实现图片旋转效果实例代码_PHP

PHP实现图片旋转效果实例代码_PHP

WBOY
WBOYOriginal
2016-05-31 19:29:19991browse

PHP对图像的旋转

<div>
    <h4>旋转之前</h4>
    <img  src="1.png"   style="max-width:90%" alt="PHP实现图片旋转效果实例代码_PHP" >
  </div>
  <&#63;php
  header("content-type","text/html;charset=utf-8");
   
  /*
  *图片沿y轴旋转,以png格式为例
  *@param string $filename 图片的url
  */
  function turn_y($filename)
  {
    /*创建图片资源*/
    $backy = imagecreatefrompng($filename);
  
    /*获取大小*/
    $widthy = imagesx($backy);
    $heighty = imagesy($backy);
  
    /*创建新的图片资源,保存翻转后的图片*/
    $newy = imagecreatetruecolor($widthy, $heighty);
  
    /*沿着y轴翻转,就是将原图从右向左按一个像素宽度向新资源中逐个复制*/
    for ($i=0; $i < $widthy; $i++) { 
      imagecopy($newy,$backy,$widthy-$i-1,0,$i,0,1,$heighty);
    }
  
    /*保存翻转后的图片*/
    imagepng($newy,'test3.png');
  
    /*释放资源*/
    imagedestroy($backy);
    imagedestroy($newy);
  }
  
  /*
  *图片沿x轴旋转,以png格式为例
  *@param string $filename 图片的url
  */
  function turn_x($filename)
  {
    /*创建图片资源*/
    $backx = imagecreatefrompng($filename);
  
    /*获取大小*/
    $widthx = imagesx($backx);
    $heightx = imagesy($backx);
  
    /*创建新的图片资源,保存翻转后的图片*/
    $newx = imagecreatetruecolor($widthx, $heightx);
  
    /*沿着x轴翻转,就是将原图从上到下按一个像素宽度向新资源中逐个复制*/
    for ($i=0; $i < $heightx; $i++) { 
      imagecopy($newx,$backx,0,$heightx-$i-1,0,$i,$widthx,1);
    }
  
    /*保存翻转后的图片*/
    imagepng($newx,'test4.png');
  
    /*释放资源*/
    imagedestroy($backx);
    imagedestroy($newx);
  }
  /*调用函数*/
  turn_y('1.png');
  turn_x('1.png');
  &#63;>
  <div style="float:left">
    <h4>沿着y轴旋转</h4>
    <img  src="test3.png"   style="max-width:90%" alt="PHP实现图片旋转效果实例代码_PHP" >
  </div>
  <div style="float:left">
    <h4>沿着x轴旋转</h4>
    <img  src="test4.png"   style="max-width:90%" alt="PHP实现图片旋转效果实例代码_PHP" >
  </div>

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn