常用的php圖片處理類

 　　這篇文章主要匯總介紹了兩個常用的php圖片處理類(水印、等比縮放、固定高寬)，非常的簡單實用，有需要的小伙伴可以參考下

　　常用的php圖片處理類(水印、等比縮放、固定高寬)分享

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 <?php //PHP 添加水印 & 比例縮略圖 & 固定高度 & 固定寬度 類。 class Image_process{ public $source; //原圖 public $source_width; //原圖寬度 public $source_height; //原圖高度 public $source_type_id; public $orign_name; public $orign_dirname;   //傳入原圖路徑 public function __construct($source){ $this->typeList = array(1=>'gif',2=>'jpg',3=>'png'); $ginfo = getimagesize($source); $this->source_width = $ginfo[0]; $this->source_height = $ginfo[1]; $this->source_type_id = $ginfo[2]; $this->orign_url = $source; $this->orign_name = basename($source); $this->orign_dirname = dirname($source); }   //判斷圖片的文件的格式，返回PHP可識別的編碼 public function judgeType($type,$source){ if($type == 1){ return imagecreatefromgif($source); //gif }else if($type == 2){ return imagecreatefromjpeg($source); //jpg }else if($type == 3){ return imagecreatefrompng($source); //png }else{ return false; } }   //生成水印圖片 public function waterMakeImage($logo){ $linfo = getimagesize($logo); $logo_width = $linfo[0]; $logo_height = $linfo[1]; $logo_type_id = $linfo[2]; $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url); $logoHandle = $this->judgeType($logo_type_id,$logo); if(!$sourceHandle || !$logoHandle){ return false; } $x = ($this->source_width - $logo_width)/2; $y = ($this->source_height - $logo_height)/2; imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height); $newPic = $this->orign_dirname.'water_'.time().'.'.$this->typeList[$this->source_type_id]; if($this->saveImage($sourceHandle,$newPic)){ imagedestroy($sourceHandle); imagedestroy($logoHandle); } }   //固定高度寬度 public function fixSizeImage($width,$height){ if($width > $this->source_width) $this->source_width; if($height > $this->source_height) $this->source_height; if($width === false){ $width = floor($this->source_width / ($this->source_height / $height)); } if($height === false){ $height = floor($this->source_height / ($this->source_width / $width)); } $this->tinyImage($width,$height); }   //等比例縮放圖片 public function scaleImage($scale){ $width = floor($this->source_width * $scale); $height = floor($this->source_height * $scale); $this->tinyImage($width, $height); }   //創建縮略圖 public function tinyImage($width,$height){ $tinyImage = imagecreatetruecolor($width,$height); $handle = $this->judgeType($this->source_type_id,$this->orign_url); if(function_exists('imagecopyresampled')){ imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height); }else{ imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height); } $newPic = $this->orign_dirname.'thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id]; if($this->saveImage($tinyImage,$newPic)){ imagedestroy($tinyImage); imagedestroy($handle); } } //保存圖片 private function saveImage($image,$url){ if(imagejpeg($image,$url)){ return true; } } } $imgHandle = new Image_process('D:AppServwwwtestgetimg14061907445601.jpg'); //$imgHandle->waterMakeImage('D:AppServwwwtestgetimgshougongke.png'); //生成水印圖片 //$imgHandle->fixSizeImage(200,150); //固定長度圖片 $imgHandle->scaleImage(0.2); //等比例縮放 ?>

　　示例二：

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