PHP 实现图片上传并添加水印的方法
内容摘要
这篇文章主要为大家详细介绍了PHP 实现图片上传并添加水印的方法,具有一定的参考价值,可以用来参考一下。
下面为各位大家介绍一下PHP图片上传并添加水印的方法 ,感兴趣的小伙
下面为各位大家介绍一下PHP图片上传并添加水印的方法 ,感兴趣的小伙
文章正文
这篇文章主要为大家详细介绍了PHP 实现图片上传并添加水印的方法,具有一定的参考价值,可以用来参考一下。
下面为各位大家介绍一下PHP图片上传并添加水印的方法 ,感兴趣的小伙伴一起来看看吧。 经测试代码如下: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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | <code class = "php" > <?php function imageWaterMark( $groundImage , $waterPos =0, $waterImage = "" , $waterText = "" , $textFont =5, $textColor = "#FF0000" ) { $isWaterImage = FALSE; $formatMsg = "暂不支持该文件格式,请用图片处理软件将图片转换为GIF、JPG、PNG格式。" ; //读取水印文件 if (! empty ( $waterImage ) && file_exists ( $waterImage )) { $isWaterImage = TRUE; $water_info = getimagesize ( $waterImage ); $water_w = $water_info [0]; //取得水印图片的宽 $water_h = $water_info [1]; //取得水印图片的高 switch ( $water_info [2]) //取得水印图片的格式 { case 1: $water_im = imagecreatefromgif( $waterImage ); break ; case 2: $water_im = imagecreatefromjpeg( $waterImage ); break ; case 3: $water_im = imagecreatefrompng( $waterImage ); break ; default : die ( $formatMsg ); } } //读取背景图片 if (! empty ( $groundImage ) && file_exists ( $groundImage )) { $ground_info = getimagesize ( $groundImage ); $ground_w = $ground_info [0]; //取得背景图片的宽 $ground_h = $ground_info [1]; //取得背景图片的高 switch ( $ground_info [2]) //取得背景图片的格式 { case 1: $ground_im = imagecreatefromgif( $groundImage ); break ; case 2: $ground_im = imagecreatefromjpeg( $groundImage ); break ; case 3: $ground_im = imagecreatefrompng( $groundImage ); break ; default : die ( $formatMsg ); } } else { die ( "需要加水印的图片不存在!" ); } //水印位置 if ( $isWaterImage ) //图片水印 { $w = $water_w ; $h = $water_h ; $label = "图片的" ; } else //文字水印 { $temp = imagettfbbox( ceil ( $textFont *2.5),0, "c:/windows/fonts/stcaiyun.ttf" , $waterText ); //取得使用 TrueType 字体的文本的范围 $w = $temp [2] - $temp [6]; $h = $temp [3] - $temp [7]; unset( $temp ); $label = "文字区域" ; } if ( ( $ground_w < $w ) || ( $ground_h < $h ) ) { echo "需要加水印的图片的长度或宽度比水印" . $label . "还小,无法生成水印!" ; return ; } switch ( $waterPos ) { case 0: //随机 $posX = rand(0,( $ground_w - $w )); $posY = rand(0,( $ground_h - $h )); break ; case 1: //1为顶端居左 $posX = 0; $posY = 0; break ; case 2: //2为顶端居中 $posX = ( $ground_w - $w ) / 2; $posY = 0; break ; case 3: //3为顶端居右 $posX = $ground_w - $w ; $posY = 0; break ; case 4: //4为中部居左 $posX = 0; $posY = ( $ground_h - $h ) / 2; break ; case 5: //5为中部居中 $posX = ( $ground_w - $w ) / 2; $posY = ( $ground_h - $h ) / 2; break ; case 6: //6为中部居右 $posX = $ground_w - $w ; $posY = ( $ground_h - $h ) / 2; break ; case 7: //7为底端居左 $posX = 0; $posY = $ground_h - $h ; break ; case 8: //8为底端居中 $posX = ( $ground_w - $w ) / 2; $posY = $ground_h - $h ; break ; case 9: //9为底端居右 $posX = $ground_w - $w ; $posY = $ground_h - $h ; break ; default : //随机 $posX = rand(0,( $ground_w - $w )); $posY = rand(0,( $ground_h - $h )); break ; } //设定图像的混色模式 imagealphablending( $ground_im , true); if ( $isWaterImage ) //图片水印 { imagecopy( $ground_im , $water_im , $posX , $posY , 0, 0, $water_w , $water_h ); //拷贝水印到目标文件 } else //文字水印 { if ( ! empty ( $textColor ) && ( strlen ( $textColor )==7) ) { $R = hexdec( substr ( $textColor ,1,2)); $G = hexdec( substr ( $textColor ,3,2)); $B = hexdec( substr ( $textColor ,5)); } else { die ( "水印文字颜色格式不正确!" ); } imagestring ( $ground_im , $textFont , $posX , $posY , $waterText , imagecolorallocate( $ground_im , $R , $G , $B )); } //生成水印后的图片 @unlink( $groundImage ); switch ( $ground_info [2]) //取得背景图片的格式 { case 1:imagegif( $ground_im , $groundImage ); break ; case 2:imagejpeg( $ground_im , $groundImage ); break ; case 3:imagepng( $ground_im , $groundImage ); break ; default : die ( $errorMsg ); } //释放内存 if (isset( $water_info )) unset( $water_info ); if (isset( $water_im )) imagedestroy( $water_im ); unset( $ground_info ); imagedestroy( $ground_im ); } //--------------------------------------------------------------------------------------- if (isset( $_FILES ) && ! empty ( $_FILES [ 'userfile' ]) && $_FILES [ 'userfile' ][ 'size' ]>0) { $uploadfile = "./" .time(). "_" . $_FILES [ 'userfile' ][ 'name' ]; if ( copy ( $_FILES [ 'userfile' ][ 'tmp_name' ], $uploadfile )) { echo "OK<br>" ; //文字水印 // imageWaterMark($uploadfile,9,"./trtt.png","www.zg700.com",5,"#FF0000"); //图片水印 $waterImage = "./shuiyin.png" ; //水印图片路径 imageWaterMark( $uploadfile ,0, $waterImage ); echo "<img src=\"" . $uploadfile . "\" border=\"0\">" ; } else { echo "Fail<br>" ; } } ?> /*** 来自:php教程(www.idcnote.com) ***/ </code> |
1 2 3 4 5 6 7 8 | <code class = "html" > <form enctype= "multipart/form-data" method= "POST" > 文件: <input name= "userfile" type= "file" > <input type= "submit" value= "上传" > </form> <!-- 来自 php教程 (www.idcnote.com)--></code> |
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