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

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

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Release： 2016-07-13 10:46:03

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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");