封装调用验证码check（），thumb（）缩略图，logo（

Posted on 2015-05-22 21:26  小蕊同学  阅读(207)  评论(0)  编辑  收藏  举报 
  1. //check(); 调用验证码
  2. //thumb('图片文件',是否覆盖，宽度，高度，'重命名前缀');生成缩略图
  3. //logo('图片文件'，位置，是否覆盖，'重命名前缀');添加图片水印
  4. //txt('图片文件',字号,'要添加的水印文字','水印颜色','水印透明度',位置，是否覆盖,'重命名前缀');添加文字水印
  5. //thumb('./a.jpg',false,100,100,'logo_');
  6. //logo('./a.jpg',5,false,'s_');
  7. //txt('./a.jpg',50,'育机构','rand',80,1,false,'t_');
  8. include 'inc/i.php';
  9. function check($len=4){
  10. 	session_start();
  11. 	header('content-type:image/png');
  12. 	$fs = ['/a.ttf','/b.ttf','/f.ttf'];
  13. 	$font = dirname(__FILE__).$fs[mt_rand(0,1)];
  14. 	$w = 35*$len;
  15. 	$h = 50;
  16. 	$i = imagecreatetruecolor($w,$h);
  17. 	$c = imagecolorallocatealpha($i,0,0,0,127);
  18. 	//imagecolortransparent($i,$c);
  19. 	//imagefill($i,0,0,$c);
  20. 	imagefilledrectangle($i,0,0,$w,$h,gc($i,'ffffff',mt_rand(0,2)));
  21. 	$sss = '';
  22. 	for($j=0;$j<$len;$j++){
  23. 		$st = gs(1);
  24. 		$sss.=$st;
  25. 	   imagettftext($i,mt_rand(15,25),mt_rand(-30,30),$j*35+10,mt_rand(28,38),gc($i),$font,$st);
  26. 	}
  27. 	$_SESSION['code'] = $sss;
  28. 	imagesetthickness($i,mt_rand(2,8));
  29. 	for($j=0;$j<mt_rand(5,10);$j++){
  30. 		imagefilledarc($i,mt_rand(0,$w),mt_rand(0,$h),mt_rand(0,$w),mt_rand(0,$h),mt_rand(0,360),mt_rand(0,360),gc($i,'rand',mt_rand(100,120)),IMG_ARC_NOFILL);	
  31. 	}
  32. 	for($j=0;$j<10;$j++){
  33. 	   imagettftext($i,mt_rand(10,15),mt_rand(-5,5),mt_rand(0,$w),mt_rand(0,$h),gc($i,'rand',mt_rand(100,120)),$font,gs(1));
  34. 	}
  35. 	imagepng($i);
  36. 	imagedestroy($i);	
  37. }
  39. function gs($n=4){
  40.     $s = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';	
  41. 	$t = '';
  42. 	for($i=0;$i<$n;$i++){
  43. 		$t.=substr($s,mt_rand(0,strlen($s)-1),1);
  44. 	}
  45. 	return $t;
  46. }
  48. /**
  49.  *  生成缩略
  50.  */
  51. function thumb($i,$f=false,$w=220,$h=0,$fn='s_'){
  52. 	$ii = getimagesize($i);
  53. 	if($ii[2]==2){
  54. 		if($ii[0]>$w){
  55. 		    $src = imagecreatefromjpeg($i);
  56. 			$sw = $ii[0];
  57. 			$sh = $ii[1];
  59. 			$h = $h==0 ? $w/$sw*$sh : $h;
  60. 			//建立新的缩略图
  61. 			$dst = imagecreatetruecolor($w,$h);
  62. 			imagecopyresampled($dst,$src,0,0,0,0,$w,$h,$sw,$sh);
  63. 			if($f){
  64. 				imagejpeg($dst,$i);
  65. 			}else{
  66. 				$path = dirname($i).'/';
  67. 				$name = $fn.substr($i,strrpos($i,'/')+1);
  68. 				imagejpeg($dst,$path.$name);			
  69. 			}
  70. 			imagedestroy($dst);
  71. 			imagedestroy($src);
  72. 		}
  73. 	}
  74. }
  76. /**
  77.  * 功能：生成水银图标，水银图标文件在inc目录中 名称 logo.png
  78.  */
  79. function logo($i,$p=5,$f=true,$fn='logo_'){
  80. 	$ii = getimagesize($i);
  81. 	if($ii[2]==2){
  82. 		if($ii[0]>300){
  83. 		    $ni = imagecreatefromjpeg($i);
  84. 			$w = $ii[0];
  85. 			$h = $ii[1];
  86. 			
  87. 			//水银图标 logo.png 格式
  88. 			$logo = dirname(__FILE__).'/logo.png';
  89. 			$li = imagecreatefrompng($logo);
  90. 			$liw = imagesx($li);
  91. 			$lih = imagesy($li);
  92. 			
  93. 			$x = ($w-$liw)/2;
  94. 			$y = ($h-$lih)/2;
  95. 			
  96. 			$pad = 35;
  97. 			switch($p){
  98. 			    case 1:
  99. 					$x = 0+$pad;
  100. 					$y = 0+$pad;
  101. 				break;
  102. 				
  103. 				case 2:
  104. 					$y = 0+$pad;				
  105. 				break;
  106. 				
  107. 				case 3:
  108. 					$x = $w-$liw-$pad;
  109. 					$y = 0+$pad;
  110. 				break;
  111. 				
  112. 				case 4:
  113. 					$x = 0+$pad;
  114. 				break;
  115. 				
  116. 				case 6:
  117. 					$x = $w-$liw-$pad;
  118. 				break;
  119. 				
  120. 				case 7:
  121. 					$x = 0+$pad;
  122. 					$y = $h-$lih-$pad;
  123. 				break;
  124. 				
  125. 				case 8:
  126. 					$y = $h-$lih-$pad;
  127. 				break;
  128. 				
  129. 				case 9:
  130. 					$x = $w-$liw-$pad;
  131. 					$y = $h-$lih-$pad;
  132. 				break;	
  133. 			}
  134. 			imagecopy($ni,$li,$x,$y,0,0,$liw,$lih);
  135. 			if($f){
  136. 				imagejpeg($ni,$i);
  137. 			}else{
  138. 				$path = dirname($i).'/';
  139. 				$name = $fn.substr($i,strrpos($i,'/')+1);
  140. 				imagejpeg($ni,$path.$name);			
  141. 			}
  142. 			imagedestroy($ni);
  143. 			imagedestroy($li);
  144. 		}
  145. 	}
  146. }
  148. function txt($i,$s=30,$t='版权所有',$c='rand',$a=0,$p=5,$f=true,$fn='t_'){
  149. 	$font = dirname(__FILE__).'/f.ttf';
  150. 	$ii = getimagesize($i);
  151. 	if($ii[2]==2){
  152. 		if($ii[0]>300){
  153. 		    $ni = imagecreatefromjpeg($i);
  154. 			$pos = imagettfbbox($s,0,$font,$t);
  155. 			$pad = 30;
  156. 			switch($p){
  157. 				case 1://左上角
  158. 					$x = 0-$pos[0]+$pad;
  159. 					$y = 0-$pos[7]+$pad;
  160. 				break;
  161. 				
  162. 				case 2://上边 水平中央
  163. 					$x = ($ii[0]-$pos[2])/2;
  164. 					$y = 0-$pos[7]+$pad;
  165. 				break;
  166. 				
  167. 				case 3:
  168. 					$x = $ii[0]-$pos[2]-$pad;
  169. 					$y = 0-$pos[7]+$pad;
  170. 				break;
  171. 				
  172. 				case 4:
  173. 					$x = 0-$pos[0]+$pad;
  174. 					$y = ($ii[1]-$pos[6])/2;
  175. 				break;
  176. 				
  177. 				case 5:
  178. 					$x = ($ii[0]-$pos[2])/2;
  179. 					$y = ($ii[1]-$pos[6])/2;
  180. 				break;
  181. 				
  182. 				case 6:
  183. 					$x = $ii[0]-$pos[2]-$pad;
  184. 					$y = ($ii[1]-$pos[6])/2;
  185. 				break;
  186. 				
  187. 				case 7:
  188. 					$x = 0-$pos[0]+$pad;
  189. 					$y = $ii[1]-$pos[6]-$pad;
  190. 				break;
  191. 				
  192. 				case 8:
  193. 					$x = ($ii[0]-$pos[2])/2;
  194. 					$y = $ii[1]-$pos[6]-$pad;
  195. 				break;
  196. 				
  197. 				case 9:
  198. 				 	$x = $ii[0]-$pos[2]-$pad;
  199. 					$y = $ii[1]-$pos[6]-$pad;
  200. 				break;
  201. 			}
  202. 			imagettftext($ni,$s,0,$x,$y,gc($ni,$c,$a),$font,$t);
  204. 			if($f){
  205. 				imagejpeg($ni,$i);
  206. 			}else{
  207. 				$path = dirname($i).'/';
  208. 				$name = $fn.substr($i,strrpos($i,'/')+1);
  209. 				imagejpeg($ni,$path.$name);			
  210. 			}
  211. 			imagedestroy($ni);
  212. 		}
  213. 	}
  214. }
  216. function gc($i,$c='rand',$a=0){
  217. 	$color = '';
  218. 	switch($c){
  219. 	    case 'white':
  220. 			$color = imagecolorallocatealpha($i,255,255,255,$a);
  221. 		break;
  222. 	    case 'black':
  223. 			$color = imagecolorallocatealpha($i,0,0,0,$a);
  224. 		break;
  225. 		case 'red':
  226. 			$color = imagecolorallocatealpha($i,255,0,0,$a);
  227. 		break;
  228. 		case 'green':
  229. 			$color = imagecolorallocatealpha($i,0,255,0,$a);
  230. 		break;
  231. 		case 'rand':
  232. 			$color = imagecolorallocatealpha($i,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255),$a);
  233. 		break;
  234. 		default:
  235. 		    $cc = str_split($c,2);
  236. 			$color = imagecolorallocatealpha($i,hexdec($cc[0]),hexdec($cc[1]),hexdec($cc[2]),$a);
  237. 		break;
  238. 	}
  239. 	return $color;
  240. }





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