fontfile = 'XHei.ttc'; } /** * 验证码图片生成方法 * @param int $speck_num 画多少个点 * @param int $line_num 画多少条线 * @param int $font_num 填充文字数量 * @return img $im */ public function verification($speck_num,$line_num,$font_num){ $_SESSION['ver_code'] = ''; $im = imagecreatetruecolor(100, 30); //画布 $text = '23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ'; //填充内容(已经去除10lo) // 随机背景颜色 $red = mt_rand(110,130); $green = mt_rand(110,130); $blue = mt_rand(110,130); $back_color = imagecolorallocate($im, $red, $green, $blue); //背景颜色 $border_color = imagecolorallocate($im, 0, 114, 198); //边框颜色 imagefilledrectangle($im,0,0,100,30,$back_color); //画背景 imagerectangle($im, 0, 0, 100, 30, $border_color); //边框 // 随机生成点 for ($i=0; $i < $speck_num; $i++) { $red = mt_rand(0,255); $green = mt_rand(0,255); $blue = mt_rand(0,255); $x = mt_rand(0,100); $y = mt_rand(0,30); $speck_color = imagecolorallocate($im, $red, $green, $blue); //点(speck:杂点，污点)颜色 imagesetpixel($im, $x, $y, $speck_color); //画点 } // 随机生成线 for ($i=0; $i < $line_num; $i++) { $red = mt_rand(0,255); $green = mt_rand(0,255); $blue = mt_rand(0,255); $cx = mt_rand(0,100); $cy = mt_rand(0,30); $width = mt_rand(0,90); $height = mt_rand(0,90); $start = mt_rand(0,360); $end = mt_rand(0,360); $line_color = imagecolorallocate($im, $red, $green, $blue); //线条颜色 imagearc($im, $cx, $cy, $width, $height, $start, $end, $line_color); //画线 } // 随机生成文字 $fonts = ''; for ($i=1; $i <= $font_num; $i++) { $red = mt_rand(0,255); $green = mt_rand(0,255); $blue = mt_rand(0,255); $size = mt_rand(20,26); $angle = mt_rand(0,26); $x = 15*$i; $y = mt_rand(25,30); $font = ''; $start = mt_rand(0,(strlen($text)-1)); $font = substr($text, $start,1); $font_color = imagecolorallocate($im, 0, 0, 0); //字体颜色 imagefttext($im, $size, $angle, $x, $y, $font_color, $this->fontfile, $font); //填充文字 $fonts .= $font; } $_SESSION['ver_code'] = $fonts; return $im; } /** * 图片缩放方法 * @param str $file 图片路径 * @param str $newFile 要生成的新文件名和路径 * @param int $width 要缩放的宽度 * @param int $height 要缩放的高度 * @return str $newFile 缩放后的图片路径 */ public function thumb($file,$newFile,$width,$height){ $old_img = imagecreatefromjpeg($file); // 得到图片的原宽高 $old_width = imagesx($old_img); $old_height = imagesy($old_img); // 原图比例 $ratio = $old_width/$old_height; // 宽够，高够 if ($old_width >= $width and $old_height >= $height) { if ($width > $height) { $new_width = $width; $new_height = $width/$ratio; } elseif($width < $height) { $new_width = $height*$ratio; $new_height = $height; }else{ if ($ratio >= 1) { $new_width = $height*$ratio; $new_height = $height; } else { $new_width = $width; $new_height = $width/$ratio; } } if ($ratio >= 1) { $nx = -(($new_width/2) - ($width/2)); $ny = 0; } else { $nx = ($width/2) - ($new_width/2); $ny = -(($new_height/2) - ($height/2)); } } // 宽够，高不够 if ($old_width >= $width and $old_height < $height) { $new_width = $width; $new_height = $width/$ratio; $nx = 0; $ny = ($height/2) - ($new_height/2); } // 宽不够，高够 if ($old_width < $width and $old_height >= $height) { $new_width = $height*$ratio; $new_height = $height; $nx = ($width/2) - ($new_width/2); $ny = 0; } // 宽不够，高不够 if ($old_width < $width and $old_height < $height) { $new_width = $old_width; $new_height = $old_height; $nx = ($width/2) - ($new_width/2); $ny = ($height/2) - ($new_height/2); } //原图坐标 $ox = 0; $oy = 0; //生成新图片 $new_img = imagecreatetruecolor($width,$height); $back_color = imagecolorallocate($new_img, 255, 255, 255); //新图片背景颜色 imagefilledrectangle($new_img,0,0,$width,$height,$back_color); //新图片背景 //创建新的图像对象(缩略图) imagecopyresized($new_img,$old_img,$nx,$ny,$ox,$oy, $new_width,$new_height,$old_width,$old_height); // 生成图片 imagejpeg($new_img,$newFile); // 销毁图片 imagedestroy($new_img); return $newFile; } /** * 图片加水印方法 * @param arr $img_path 原图信息 * @param str/arr $wt_con 水印内容 * @param str $seat 水印位置 1.up_l(上左) 2.up_r(上右) 3.do_l(下左) 4.do_r(下右) * @param arr $gap 边距 (width=>侧边距离，height=>底部距离/顶部距离) * @param int $alpha 透明度 */ public function waterMark($img_path,$wt_con,$seat,$gap,$alpha=''){ $old_path = $img_path; // 得到原图 $old_img = imagecreatefromjpeg($old_path); $old_info = getimagesize($old_path); // 得到水印信息(区分图片或文字) if (is_array($wt_con)) { $font = imagettfbbox($wt_con['size'], 0, $this->fontfile, $wt_con['text']); $wt_info['0'] = $font[4] - $font[6]; $wt_info['1'] = $font[1] - $font[7]; } else { $wt_img = imagecreatefrompng($wt_con); $wt_info = getimagesize($wt_con); } // 计算水印位置 $water_seat = $this->wmGap($old_info,$wt_info,$seat,$gap); // 打水印(区分图片或文字) if (is_array($wt_con)) { $font_color = imagecolorallocate($old_img, 234, 234, 234); // 下面的$water_seat['gap_h']+20 因 imagettfbbox() 坐标系统和其他的统一所致 imagettftext($old_img, $wt_con['size'], 0, $water_seat['gap_w'], $water_seat['gap_h']+20, $font_color, $this->fontfile, $wt_con['text']); } else { if ($alpha == '') { imagecopy($old_img, $wt_img, $water_seat['gap_w'], $water_seat['gap_h'], 0, 0, $wt_info['0'], $wt_info['1']); //无背景，不可透明 } else { imagecopymerge($old_img, $wt_img, $water_seat['gap_w'], $water_seat['gap_h'], 0, 0, $wt_info['0'], $wt_info['1'], $alpha); //有背景，可透明 } } // 生成加水印后的图片 imagepng($old_img,$old_path); // 销毁图片 imagedestroy($old_img); imagedestroy($wt_img); } /** * 计算水印位置 * @param arr $old_info 原图信息 * @param arr $wt_info 水印图信息 * @param str $seat 位置 * @param int $gap 边距 * @return arr $arr 处理好的数组 */ public function wmGap($old_info,$wt_info,$seat,$gap){ switch ($seat) { case 'up_l': $arr['gap_w'] = $gap['0']; $arr['gap_h'] = $gap['1']; break; case 'up_r': $width = $old_info['0'] - $wt_info['0'] - $gap['0']; $arr['gap_w'] = $width; $arr['gap_h'] = $gap['1']; break; case 'do_l': $height = $old_info['1'] - $wt_info['1'] - $gap['1']; $arr['gap_w'] = $gap['0']; $arr['gap_h'] = $height; break; case 'do_r': $width = $old_info['0'] - $wt_info['0'] - $gap['0']; $height = $old_info['1'] - $wt_info['1'] - $gap['1']; $arr['gap_w'] = $width; $arr['gap_h'] = $height; break; default: $arr['gap_w'] = $gap['0']; $arr['gap_h'] = $gap['1']; break; } return $arr; } } ?>