Home >Backend Development >PHP Tutorial >利用php给图片添加文字水印面向对象与面向过程俩种方法的实现

利用php给图片添加文字水印面向对象与面向过程俩种方法的实现

WBOY
WBOYOriginal
2016-06-23 13:27:49930browse

1: 面向过程的编写方法

//指定图片路径$src = '001.png';//获取图片信息$info = getimagesize($src);//获取图片扩展名$type = image_type_to_extension($info[2],false);//动态的把图片导入内存中$fun =  "imagecreatefrom{$type}";$image = $fun('001.png');//指定字体颜色$col = imagecolorallocatealpha($image,255,255,255,50);//指定字体内容$content = 'helloworld';//给图片添加文字imagestring($image,5,20,30,$content,$col);//指定输入类型header('Content-type:'.$info['mime']);//动态的输出图片到浏览器中$func = "image{$type}";$func($image);//销毁图片imagedestroy($image);

2:面向对象的实现方法

class Image_class {    private $image;    private $info;    /**     * @param $src:图片路径     * 加载图片到内存中     */    function __construct($src){        $info = getimagesize($src);        $type = image_type_to_extension($info[2],false);        $this -> info =$info;        $this->info['type'] = $type;        $fun = "imagecreatefrom" .$type;        $this -> image = $fun($src);    }    /**     * @param $fontsize: 字体大小     * @param $x: 字体在图片中的x位置     * @param $y: 字体在图片中的y位置     * @param $color: 字体的颜色是一个包含rgba的数组     * @param $text: 想要添加的内容     * 操作内存中的图片,给图片添加文字水印     */    public function fontMark($fontsize,$x,$y,$color,$text){        $col = imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]);        imagestring($this->image,$fontsize,$x,$y,$text,$col);    }    /*     * 输出图片到浏览器中     */    public function show(){       header('content-type:' . $this -> info['mime']);        $fun='image' . $this->info['type'];        $fun($this->image);    }    /**     * 销毁图片     */    function __destruct(){        imagedestroy($this->image);    }}//对类的调用$obj = new Image_class('001.png');$obj->fontMark(20,20,30,array(255,255,255,60),'hello');$obj->show();

 

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