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注意視頻里寫的兩個info:
函數(shù)里的$info和$this->info是不同的變量

<?php

class Image{

private $image;

private $info;

public function __construct($src)

{

$info2 = getimagesize($src);

$this->info = array(

'width' => $info2[0],

'height' => $info2[1],

'type' => image_type_to_extension($info2['2'],false),

'mime' => $info2['mime']

);

$fun = "imagecreatefrom{$this->info['type']}";

$this->image = $fun($src);

}

public function thumb($width,$height)

{

$image_thumb = imagecreatetruecolor($width, $height);

imagecopyresampled($image_thumb, $this->image, 0, 0, 0, 0, $width, $height, $this->info['width'],$this->info['height']);

imagedestroy($this->image);

$this->image = $image_thumb;

}

public function show()

{

header("Content-type:".$this->info['mime']);

$funs = "image{$this->info['type']}";

$funs($this->image);

}

public function save($newimage)

{

$funs = "image{$this->info['type']}";

$funs($this->image,$newname.'.'.$this->info['type']);

}

public function __destruct()

{

imagedestroy($this->image);

}

}

?>

<title>給圖片添加圖片水印</title>

<?php

/*一、打開圖片*/

$src = "001.png";

$info = getimagesize($src);

$type = image_type_to_extension($info[2],false);

$fun = "imagecreatefrom{$type}";

$image = $fun($src);

/*二、操作圖片*/

$image_Mark = "logo.png";

$info2 = getimagesize($image_Mark);

$type2 = image_type_to_extension($info[2],false);

$fun2 = "imagecreatefrom{$type2}";

$water = $fun2($image_Mark);

//合并圖片 ?0,0，$info[0],$info[1]將水印圖片從原圖的左上角頂點開始復制，0，0代表有多高復制多高，有多寬復制多寬。

imagecopymerge($image,$water,20,30,0,0,$info2[0],$info2[1],30);

imagedestroy($water);

/*三、輸出圖片*/

ob_clean();

header("content-type:".$info['mime']);

$funs = "image{$type}";

$funs($image);

$funs($image,"hi.".$type); ?//保存圖片

/*四、銷毀圖片*/

imagedestroy($image);

?>

teat.php

<?php?
????require?"image_class.php";
????$src?=?'1.jpg';
????$image?=?new?Image($src);
????$image->thumb(300,200);
????$image->show();

我的經過測試沒有問題（代碼如下）：

<?php?
//封裝成類-壓縮圖片
class?Image{	
????private?$image;
????private?$info;	
????//1.打開一張圖片，讀取到內存中	
????public?function?__construct($src){		
????????$info?=?getimagesize($src);//獲取圖片信息放在$info里		
????????$this->info?=?array(			
????????'width'?=>?$info[0],			
????????'height'?=>?$info[1],			
????????'type'?=>?image_type_to_extension($info[2],false),			
????????'mime'?=>?$info['mime']);		
????????$fun?=?"imagecreatefrom{$this->info['type']}";		
????????$this->image?=?$fun($src);	}	
????????//2.操作圖片(壓縮)	
????????public?function?thumb($width,$height){		
????????????$image_thumb?=?imagecreatetruecolor($width,$height);		
????????????imagecopyresampled($image_thumb,$this->image,0,0,0,0,$width,$height,$this->info['width'],$this->info['height']);		
????????????imagedestroy($this->image);		
????????????$this->image?=?$image_thumb;	
????????}	
????????//3.在瀏覽器中輸出圖片	
????????public?function?show(){		
????????????header("Content-type:".$this->info['mime']);		
????????????$funs?=?"image{$this->info['type']}";		
????????????$funs($this->image);	
????????}	
????????//4.把圖片保存到硬盤里	
????????public?function?save($newname){		
????????????$funs?=?"image{$this->info['type']}";		
????????????$funs($this->image,$newname.'.'.$this->info['type']);	
????????}	//5.銷毀圖片	
????????public?function?__destruct(){		
????????????????imagedestroy($this->image);	
????????}
?????}

筆記1

成功了，代碼如下： header('Content-type:text/html;charset=utf8'); //打開圖片 $pic_src='p02.jpg'; $pic_info=getimagesize($pic_src); $pic_type=image_type_to_extension($pic_info[2],false); $fun="imagecreatefrom{$pic_type}"; $image=$fun($pic_src); //操作圖片 $font='msyh.ttf'; $content='您好，翌創(chuàng)'; $col=imagecolorallocatealpha($image,255,255,255,50); imagettftext($image,20,0,20,30,$col,$font,$content); //輸出圖片 header("Content-type:".$pic_info['mime']); $func="image{$pic_type}"; $func($image); //保存圖片 $func($image,'images/new.'.$pic_type); //清理圖片 imagedestory($images);

test.php <?php require "image.class.php"; $src = "image/test.jpg"; $image = new Image($src); $image->image_Thumb(300,200); $image->image_Show(); $image->image_Destroy(); ?>

image.class.php <?php /** * 圖片工具類 */ class Image{ private $image; private $info; /** * 構造函數(shù) */ public function __construct($src){ //獲取圖片信息 $info = getimagesize($src); $this->info = array( 'width' => $info[0], 'height' => $info[1], 'type' => image_type_to_extension($info[2],false), 'mime' => $info[3] ); //在內存中創(chuàng)建一個相同類型的圖片 $new_cache = "imagecreatefrom{$this->info['type']}"; $this->image = $new_cache($src); }

/** * 操作圖片 縮略圖 */ public function image_Thumb($dstWidth,$dstHeight){ $image_thumb = imagecreatetruecolor($dstWidth,$dstHeight); imagecopyresampled($image_thumb,$this->image,0,0,0,0,$dstWidth,$dstHeight,$this->info['width'],$this->info['height']); //原始圖片已使用完畢 可以銷毀 imagedestroy($this->image); $this->image = $image_thumb; } /** * 顯示圖片 */ public function image_Show(){ header("content-type:".$this->info['mime']); $new_cache = "image{$this->info['type']}"; $new_cache($this->image); } /** * 銷毀圖片 */ public function image_Destroy(){ imagedestroy($this->image); } } ?>

<?php /*打開圖片*/ //1.配置圖片路徑 $src_url = "image/GD_test.png"; //2.獲取圖片信息 $info = getimagesize($src_url); // echo "<pre>"; //print_r($info); //3.通過圖片編號來確認圖片類型，取消false參數(shù)獲取值為 .png ; $type = image_type_to_extension($info[2],false); // print_r($type); //4.在內存中創(chuàng)建一個和打開圖片類型一樣的圖像 $fun = "imagecreatefrom{$type}"; //相當于 $fun = imagecreatefrompng()； //5.把圖片復制到內存中 $image = $fun($src_url); //相當于 imagecreatefrompng($src) /*操作圖片*/ //1.設置字體路徑 $font = "image/msyhl.ttc"; //2.填寫水印內容 $content = "xiaoweiba.ml"; //3.設置字體顏色RGB值和透明度， //參數(shù)1：內存中的圖片； 參數(shù)2：顏色； 參數(shù)3：透明度 //注意?。?！ png圖片無法正常渲染字體顏色?。。?！ $col = imagecolorallocatealpha($image,0,0,0,15);

imagettftext($image,20,0,20,30,$col,$font,$content); /*輸出圖片*/ //1.瀏覽器輸出 header("Content-type:".$info['mime']); $func = "image{$type}"; //如果是jpeg就調用 imagejpeg()方法，如果是peg就會調用imagepng()方法 $func($image); //2.保存圖片 $func($image,'image/newimage.'.$type); //imagepng($image,'image/newimage.png'); //顯示圖片 //輸出生成的圖片，配置文件路徑 $src_new = "image/newimage.png"; //無法直接輸出圖片，必須將圖片復制到內存中。 $fun_new = imagecreatefrompng($src_new); //輸出圖片 imagepng($fun_new); // imagepng(imagecreatefrompng("image/newimage.png")); /*銷毀圖片*/ imagedestroy($image); imagedestroy($fun_new); ?>

/* 輸出圖片 */ public function show() { header("Content-type:".$this->info['mime']); $funs="image{$this->info['type']}"; $funs($this->image); } /* 保存圖片 */ public function save($newImage) { $funs="image{$this->info['type']}"; $funs($this->image,$newImage.'.'.$this->info['type']); } /* 銷毀圖片 */ public function __destruct() { imagedestroy($this->image); } } ?>