本文PHP图片操作封装类里面的四种方法，文字水印（imagettftext()），图片水印（imagecopymerge()），图片压缩，图片剪切(imagecopyresampled())，其余的常用GD函数便不赘述。
直接上代码：
<?php </p><br />class Image<br />{ <br /> private $info;<br /><br /> private $image;<br /> public $type;<br /> public function __construct($src)<br /> {<br /><br /> $this->info=getimagesize($src);<br /> $this->type=image_type_to_extension($this->info['2'],false);<br /> $fun="imagecreatefrom{$this->type}";<br /> $this->image=$fun($src);<br /> }<br /> /**<br /> * 文字水印<br /> * @param [type] $font 字体<br /> * @param [type] $content 内容<br /> * @param [type] $size 文字大小<br /> * @param [type] $col 文字颜色（四元数组）<br /> * @param array $location 位置 <br /> * @param integer $angle 倾斜角度<br /> * @return [type] <br /> */<br /> public function fontMark($font,$content,$size,$col,$location,$angle=0){<br /> $col=imagecolorallocatealpha($this->image, $col['0'], $col['1'], $col['2'],$col['3']);<br /><br /> imagettftext($this->image, $size, $angle, $location['0'], $location['1'], $col,$font,$content);<br /> }<br /> <br /> /**<br /> * 图片水印<br /> * @param [type] $imageMark 水印图片地址<br /> * @param [type] $dst 水印图片在原图片中的位置<br /> * @param [type] $pct 透明度<br /> * @return [type] <br /> */<br /> public function imageMark($imageMark,$dst,$pct){<br /> $info2=getimagesize($imageMark);<br /> $type=image_type_to_extension($info2['2'],false);<br /> $func2="imagecreatefrom".$type;<br /> $water=$func2($imageMark);<br /><br /> imagecopymerge($this->image, $water, $dst[0], $dst[1], 0, 0, $info2['0'], $info2['1'], $pct);<br /> imagedestroy($water);<br /><br /> }<br /> /**<br /> * 压缩图片<br /> * @param [type] $thumbSize 压缩图片大小<br /> * @return [type] [description]<br /> */<br /> public function thumb($thumbSize){<br /> $imageThumb=imagecreatetruecolor($thumbSize[0], $thumbSize[1]);<br /> <br /> imagecopyresampled($imageThumb, $this->image, 0, 0, 0, 0, $thumbSize[0], $thumbSize[1], $this->info['0'], $this->info['1']);<br /> imagedestroy($this->image);<br /> $this->image=$imageThumb;<br /> }<br /> /**<br /> * 裁剪图片<br /> * @param [type] $cutSize 裁剪大小<br /> * @param [type] $location 裁剪位置<br /> * @return [type] [description]<br /> */<br /> public function cut($cutSize,$location){<br /> $imageCut=imagecreatetruecolor($cutSize[0],$cutSize[1]);<br /><br /> imagecopyresampled($imageCut, $this->image, 0, 0, $location[0], $location[1],$cutSize[0],$cutSize[1],$cutSize[0],$cutSize[1]);<br /> imagedestroy($this->image);<br /> $this->image=$imageCut;<br /> }<br /> /**<br /> * 展现图片<br /> * @return [type] [description]<br /> */<br /> public function show(){<br /> header("content-type:".$this->info['mime']);<br /><br /> $funn="image".$this->type;<br /><br /> $funn($this->image);<br /> }<br /> /**<br /> * 保存图片<br /> * @param [type] $newname 新图片名<br /> * @return [type] [description]<br /> */<br /> public function save($newname){<br /> header("content-type:".$this->info['mime']);<br /><br /> $funn="image".$this->type;<br /><br /> $funn($this->image,$newname.'.'.$this->type);<br /> }<br /> public function __destruct(){<br /> imagedestroy($this->image);<br /> }<br /><br /> }<br /><br /> ?>
