PHP generates thumbnail classes that support custom height and width. Also supports taking screenshots according to height and width_PHP tutorial

php tutorial generates thumbnail class, supports custom height and width. Also supports taking screenshots according to height and width

class resizeimage
{
//Image type
var $type;
//Actual width
var $width;
//Actual height
var $height;
//Changed width
var $resize_width;
//Height after change
var $resize_height;
//Whether to crop the image
var $cut;
//Source image
var $srcimg;
//Target image address
var $dstimg;
//Temporarily created image
var $im;
Function resizeimage($img, $wid, $hei,$c,$dstpath)
{ 
           $this->srcimg = $img;                                           $this->resize_width = $wid;                                              $this->resize_height = $hei;                                                  $this->cut = $c;                                 //Type of image

$this->type = strtolower(substr(strrchr($this->srcimg,"."),1));
//Initialize image
           $this->initi_img();                              //Target image address
           $this -> dst_img($dstpath);                                        //--                                                                $this->width = imagesx($this->im); 
           $this->height = imagesy($this->im); 
//Generate image
$this->newimg();
ImageDestroy ($this->im);
}  
Function newimg()
{ 
//The proportion of the changed image
         $resize_ratio = ($this->resize_width)/($this->resize_height);
//Proportion of actual image
         $ratio = ($this->width)/($this->height);
If(($this->cut)=="1")
// Plans                                                                                    If($ratio>=$resize_ratio)
                             //High priority                                                                      $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this ->height);
ImageJpeg ($newimg,$this->dstimg);
                                                                                                                                If($ratio<$resize_ratio)
//Width first
                                                                     $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width) /$resize_ratio));
ImageJpeg ($newimg,$this->dstimg);
                                                                                                                                                                                                                                                      else
//No cropping
                                                                                   If($ratio>=$resize_ratio)
                                                                                          $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this-> ;height);
ImageJpeg ($newimg,$this->dstimg);
                                                                                                                                If($ratio<$resize_ratio)
                                                                                    $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height); 
                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height); 
                ImageJpeg ($newimg,$this->dstimg); 
            } 
        } 
    } 
    //初始化图象 
    function initi_img() 
    { 
        if($this->type=="jpg") 
        { 
            $this->im = imagecreatefromjpeg($this->srcimg); 
        } 
        if($this->type=="gif") 
        { 
            $this->im = imagecreatefromgif($this->srcimg); 
        } 
        if($this->type=="png") 
        { 
            $this->im = imagecreatefrompng($this->srcimg); 
        } 
    } 
    //图象目标地址 
    function dst_img($dstpath) 
    { 
        $full_length  = strlen($this->srcimg); 
        $type_length  = strlen($this->type); 
        $name_length  = $full_length-$type_length; 

        $name         = substr($this->srcimg,0,$name_length-1); 
        $this->dstimg = $dstpath; 

//echo $this->dstimg; 
    } 
} 

$resizeimage = new resizeimage("11.jpg", "200", "150", "1","17.jpg"); 

http://www.bkjia.com/PHPjc/632972.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/632972.htmlTechArticlephp教程生成缩略图类，支持自定义高和宽。还支持按高和宽截图 ?php class resizeimage { //图片类型 var $type; //实际宽度 var $width; //实际高度 va...