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[PHP] php生成缩略图实用程序-PHP源码

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  • 发表于 2018-7-16 19:01:00 | 显示全部楼层 |阅读模式
    srcimg = $img;
    $this->resize_width = $wid;
    $this->resize_height = $hei;
    $this->cut = $c;
    //图片的类型
    $this->type = strtolower(substr(strrchr($this->srcimg,"."),1));
    //初始化图象
    $this->initi_img();
    //目标图象地址
    $this -> dst_img($dstpath);
    //--
    $this->width = imagesx($this->im);
    $this->height = imagesy($this->im);
    //生成图象
    $this->newimg();
    ImageDestroy ($this->im);
    }
    function newimg()
    {
    //改变后的图象的比例
    $resize_ratio = ($this->resize_width)/($this->resize_height);
    //实际图象的比例
    $ratio = ($this->width)/($this->height);
    if(($this->cut)=="1")
    //裁图
    {
    if($ratio>=$resize_ratio)
    //高度优先
    {
    $newimg = imagecreatetruecolor($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,$this->dstimg);
    }
    if($ratioresize_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,$this->dstimg);
    }
    }
    else
    //不裁图
    {
    if($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,$this->dstimg);
    }
    if($ratioresize_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("1.jpg", "200", "150", "1","2.jpg");
    ?>
    [/td] [/tr] [/table]
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