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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 | <?PHP/*** 上传图片*/class imgUpload{ static protected $a; protected $formName; //表单名称 protected $directory; //文件上传至目录 protected $maxSize; //最大文件上传大小 protected $canUpload; //是否可以上传 protected $doUpFile; //上传的文件名 protected $sm_File; //缩略图名称 private function __construct($_formName='file', $_directory='./images/uploads/', $_maxSize=1048576){ //1024*1024=1M //初始化参数 $this->formName = $_formName; $this->directory = $_directory; $this->maxSize = $_maxSize; $this->canUpload = true; $this->doUpFile = ''; $this->sm_File = ''; } //判断图片是否属于允许格式内 static public function Type($_formName='file'){ $_type = $_FILES[$_formName]['type']; switch ($_type){ case 'image/gif': if (self::$a==NULL) self::$a = new imgUpload($_formName); break; case 'image/pjpeg': if (self::$a==NULL) self::$a = new imgUpload($_formName); break; case 'image/x-png': if (self::$a==NULL) self::$a = new imgUpload($_formName); break; default: self::$a = false; } return self::$a; } //获取文件大小 public function getSize($_format='K'){ if ($this->canUpload) { if (0 == $_FILES[$this->formName]['size']) { $this->canUpload = false; return $this->canUpload; break; } switch ($_format){ case 'B': return $_FILES[$this->formName]['size']; break; case 'K': return round($_FILES[$this->formName]['size'] / 1024); break; case 'M': return round($_FILES[$this->formName]['size'] / (1024*1024),2); break; } } } //获取文件类型 public function getExt(){ if ($this->canUpload) { $_name = $_FILES[$this->formName]['name']; $_nameArr = explode('.',$_name); $_count = count($_nameArr)-1; } return $_nameArr[$_count]; } //获取文件名称 public function getName(){ if ($this->canUpload) { return $_FILES[$this->formName]['name']; } } //新建文件名 public function newName(){ return date('YmdHis').rand(0,9); } //上传文件 public function upload(){ if ($this->canUpload) { $_getSize = $this->getSize('B'); if (!$_getSize) { return $_getSize; break; } else { $_newName = $this->newName(); $_ext = $this->getExt(); $_doUpload = move_uploaded_file($_FILES[$this->formName]['tmp_name'], $this->directory.$_newName.".".$_ext); if ($_doUpload) { $this->doUpFile = $_newName; } return $_doUpload; } } } //创建缩略图 public function thumb($_dstChar='_m', $_max_len=320){ //$_dstChar:_m , _s if ($this->canUpload && $this->doUpFile != "") { $_ext = $this->getExt(); $_srcImage = $this->directory.$this->doUpFile.".".$_ext; //得到图片信息数组 $_date = getimagesize($_srcImage, &$info); $src_w = $_date[0]; //源图片宽 $src_h = $_date[1]; //源图片高 $src_max_len = max($src_w, $src_h); //求得长边 $src_min_len = min($src_w, $src_h); //求得短边 $dst_w = ''; //目标图片宽 $dst_h = ''; //目标图片高 //宽高按比例缩放，最长边不大于$_max_len if ($src_max_len>$_max_len) { $percent = $src_min_len / $src_max_len; if ($src_w == $src_max_len) { $dst_w = $_max_len; $dst_h = $percent * $dst_w; } else { $dst_h = $_max_len; $dst_w = $percent * $dst_h; } } else { $dst_w = $src_w; $dst_h = $src_h; } //建立缩略图时,源图片的位置 $src_x = ''; $src_y = ''; //判断如果缩略图用于logo，将对其进行裁减 if ('s_' == $_dstChar) { $src_x = $src_w * 0.10; $src_y = $src_h * 0.10; $src_w *= 0.8; $src_h *= 0.8; } //判断图片类型并创建对应新图片 switch ($_date[2]){ case 1: $src_im = imagecreatefromgif($_srcImage); break; case 2: $src_im = imagecreatefromjpeg($_srcImage); break; case 3: $src_im = imagecreatefrompng($_srcImage); break; case 8: $src_im = imagecreatefromwbmp($_srcImage); break; } //创建一幅新图像 if ($_date[2]==1) { //gif无法应用imagecreatetruecolor $dst_im = imagecreate($dst_w, $dst_h); }else { $dst_im = imagecreatetruecolor($dst_w, $dst_h); } //对这副图像进行缩略图copy// $bg = imagecolorallocate($dst_im,255,255,0); imagecopyresized($dst_im,$src_im, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); //对图片进行抗锯齿操作 imageantialias($dst_im, true); switch ($_date[2]) { case 1: $cr = imagegif($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100); break; case 2: $cr = imagejpeg($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100); break; case 3://imagepng有问题，所以在这里用imagejpg代替 $cr = imagejpeg($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100); break; }// $cr = imagejpeg($dst_im, $this->directory.$_dstChar.$this->doUpFile, 90); if ($cr) { $this->sm_File = $this->directory.$this->doUpFile.$_dstChar.".".$_ext; return $this->sm_File; }else { return false; } } imagedestroy($dst_im); imagedestroy($cr); } //得到上传后的文件名 public function getUpFile(){ if ($this->doUpFile!='') { $_ext = $this->getExt(); return $this->doUpFile.".".$_ext; }else { return false; } } //得到上传后的文件全路径 public function getFilePatch(){ if ($this->doUpFile!='') { $_ext = $this->getExt(); return $this->directory.$this->doUpFile.".".$_ext; }else { return false; } } //得到缩略图文件全路径 public function getThumb(){ if ($this->sm_File!='') { return $this->sm_File; }else { return false; } } //得到上传文件的路径 public function getDirectory(){ if ($this->directory!='') { return $this->directory; }else { return false; } }}?> |