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Scripts > PHP > GD library > Image Manipulator (Watermark and Thumb

Image Manipulator (Watermark and Thumb

Auteur: Sean - 20 maart 2005 - 19:08 - Gekeurd door: XenoX - Hits: 6746 - Aantal punten: 3.50 (4 stemmen)




Alle informatie staat in de comments, echter staat het wel in het engels zodat het script niet alleen door Nederlands-sprekenden gebruikt kan worden.

Code:
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  1. <?php
  2. /**
  3.  * Image manipulation class. Create thumbnails or add watermarks to an image
  4.  * Created for easy usage
  5.  *
  6.  * @author	Sean Koole
  7.  * @access	public
  8.  */
  9. class Image
  10. {
  11. 	/**
  12. 	 * Create a thumbnail
  13. 	 *
  14. 	 * @param	string $imgPath			The path of the image
  15. 	 * @param	string $newPath			The path to where the image should be copied to
  16. 	 * @param	bool $overwrite			Do you wish to overwrite the file if it already exists
  17. 	 * @param	int $imgMaxWidth		The maximum width of the thumbnail
  18. 	 * @param	int $imgMaxHeight		The maximum height of the thumbnail
  19. 	 * @param	int $quality			The quality of the image (100 is max and best)
  20. 	 * @return	bool
  21. 	 * @access	public
  22. 	 */
  23. 	function CreateThumb ($imgPath, $newPath, $overwrite = false, $imgMaxWidth = 100, $imgMaxHeight = 100, $quality = 100)
  24. 	{
  25. 		/**
  26. 		 * Basic checks
  27. 		 * - Check if the maxwidth and maxheight are integers
  28. 		 * - Check if the image exists to be thumbnailed
  29. 		 * - Check if we need to overwrite or not, if necessary
  30. 		 * - Check if we have gd enabled
  31. 		 */
  32. 		if (!ctype_digit ($imgMaxWidth) || !ctype_digit ($imgMaxHeight))
  33. 			return false;
  34. 		if (!file_exists ($imgPath))
  35. 			return false;
  36. 		if (file_exists ($newPath) && ($overwrite == false || $overwrite == ''))
  37. 			return false;
  38. 		if (!extension_loaded ('gd'))
  39. 			return false;
  40.  
  41. 		/**
  42. 		 * Store the information in an array for easy use
  43. 		 */
  44. 		$thumb						= array ();
  45. 		$thumb['imgOldPath']		= $imgPath;
  46. 		$thumb['imgNewPath']		= $newPath;
  47. 		$thumb['imgMaxWidth']		= $imgMaxWidth;
  48. 		$thumb['imgMaxHeight']		= $imgMaxHeight;
  49. 		$thumb['imgQuality']		= $quality;
  50. 		$thumb['imgExtension']		= strtolower (end(explode ('.', $thumb['imgOldPath'])));
  51.  
  52. 		list ($thumb['imgWidth'], $thumb['imgHeight']) = getimagesize ($thumb['imgOldPath']);
  53.  
  54. 		/**
  55. 		 * Create the new height and width for the thumbnail image
  56. 		 */
  57. 		$ratio	=  ($thumb['imgWidth'] > $thumb['imgMaxWidth']) ? (real)($thumb['imgMaxWidth'] / $thumb['imgWidth']) : 1;
  58. 		$width	= ((int)($thumb['imgWidth'] * $ratio));
  59. 		$height	= ((int)($thumb['imgHeight'] * $ratio));
  60.  
  61.     	$ratio	=  ($height > $height) ? (real)($thumb['imgMaxHeight'] / $height) : 1;
  62.     	$width	= ((int)($width * $ratio));
  63.     	$height	= ((int)($height * $ratio));
  64.  
  65. 		/**
  66. 		 * Choose the functions to use
  67. 		 */
  68. 		if ($thumb['imgExtension'] == 'jpg' || $thumb['imgExtension'] == 'jpeg' || $thumb['imgExtension'] == 'jpe' || $thumb['imgExtension'] == 'jfif')
  69. 		{
  70. 			$thumb['imgExtension'] = 'jpg';
  71. 			$func1 = 'imagecreatefromjpeg';
  72. 			$func2 = 'imagejpeg';
  73. 		}
  74. 		else if ($thumb['imgExtension'] == 'gif')
  75. 		{
  76. 			$thumb['imgExtension'] = 'gif';
  77. 			$func1 = 'imagecreatefromgif';
  78. 			$func2 = 'imagegif';
  79. 		}
  80. 		else if ($thumb['imgExtension'] == 'png')
  81. 		{
  82. 			$thumb['imgExtension'] = 'png';
  83. 			$func1 = 'imagecreatefrompng';
  84. 			$func2 = 'imagepng';
  85. 		}
  86. 		else
  87. 			return false;
  88.  
  89. 		/**
  90. 		 * Check if we can manipulate this image
  91. 		 */
  92. 		$check = defined ('IMG_' . strtoupper ($thumb['imgExtension'])) ? constant ('IMG_' . strtoupper ($thumb['imgExtension'])) : 0;
  93. 		if ($check == 0)
  94. 			return false;
  95.  
  96. 		/**
  97. 		 * Create the thumbnail and stuff
  98. 		 */
  99. 		$img_new	= imagecreatetruecolor ($width, $height);
  100. 		$img_old	= $func1 ($thumb['imgOldPath']);
  101. 		imagecopyresampled ($img_new, $img_old, 0, 0, 0, 0, $width, $height, $thumb['imgWidth'], $thumb['imgHeight']);
  102. 		$func2 ($img_new, $thumb['imgNewPath'], $thumb['imgQuality']);
  103. 		imagedestroy ($img_new);
  104. 		imagedestroy ($img_old);
  105.  
  106. 		/**
  107. 		 * Return true
  108. 		 */
  109. 		return true;
  110. 	}
  111.  
  112.  
  113. 	/**
  114. 	 * Add a watermark to an image
  115. 	 *
  116. 	 * @param	string $image			The path of the image
  117. 	 * @param	string $watermark		The path of the watermark image
  118. 	 * @param	bool $transparency		The transparancy level of the image
  119. 	 * @param	int $wposition			The amount of pixels the watermark should be placed from the left of the image
  120. 	 * @param	int $hposition			The amount of pixels the watermark should be placed from the top of the image
  121. 	 * @return	bool
  122. 	 * @access	public
  123. 	 */
  124. 	function AddWatermark ($image, $watermark, $transparency = 16, $wposition = 0, $hposition = 0)
  125. 	{
  126. 		/**
  127. 		 * Check if the image and the watermark image exist
  128. 		 */
  129. 		if (!file_exists ($image))
  130. 			return trigger_error ('Could not add watermark to image ' . $_IMG['IMGName'] . ', image file does not exist');
  131. 		if (!file_exists ($watermark))
  132. 			return trigger_error ('Could not add watermark to image ' . $_IMG['IMGName'] . ', watermark file does not exist');
  133.  
  134. 		/**
  135. 		 * Store the information in an array for easy use
  136. 		 */
  137. 		$_IMG	= array ();
  138. 		$_IMG['transparency']	= $transparency;
  139. 		$_IMG['image']			= $image;
  140. 		$_IMG['watermark']		= $watermark;
  141. 		$_IMG['wposition']		= $wposition;
  142. 		$_IMG['hposition']		= $hposition;
  143.  
  144. 		$_EXT	= array ();
  145. 		$_EXT['image']			= end (explode ('.', strtolower ($_IMG['image'])));
  146. 		$_EXT['watermark']		= end (explode ('.', strtolower ($_IMG['watermark'])));
  147.  
  148. 		/**
  149. 		 * Make sure we use the correct things
  150. 		 */
  151. 		switch ($_EXT['image'])
  152. 		{
  153. 			case 'jpg':
  154. 				$_IMG['iinfo']	= array ('image/jpeg', 'imagecreatefromjpeg', 'imagejpeg');
  155. 			break;
  156. 			case 'gif':
  157. 				$_IMG['iinfo']	= array ('image/gif', 'imagecreatefromgif', 'imagegif');
  158. 			break;
  159. 			case 'png':
  160. 				$_IMG['iinfo']	= array ('image/png', 'imagecreatefrompng', 'imagepng');
  161. 			break;
  162. 			default:
  163. 				$_IMG['iinfo']	= array ('image/jpeg', 'imagecreatefromjpeg', 'imagejpeg');
  164. 			break;
  165. 		}
  166. 		switch ($_EXT['watermark'])
  167. 		{
  168. 			case 'jpg':
  169. 				$_IMG['winfo']	= array ('image/jpeg', 'imagecreatefromjpeg', 'imagejpeg');
  170. 			break;
  171. 			case 'gif':
  172. 				$_IMG['winfo']	= array ('image/gif', 'imagecreatefromgif', 'imagegif');
  173. 			break;
  174. 			case 'png':
  175. 				$_IMG['winfo']	= array ('image/png', 'imagecreatefrompng', 'imagepng');
  176. 			break;
  177. 			default:
  178. 				$_IMG['winfo']	= array ('image/jpeg', 'imagecreatefromjpeg', 'imagejpeg');
  179. 			break;
  180. 		}
  181.  
  182. 		/**
  183. 		 * Create the images
  184. 		 */
  185. 		$_IMG['image_mark']		= $_IMG['winfo'][1] ($_IMG['watermark']); 
  186. 		$_IMG['image_image']	= $_IMG['iinfo'][1] ($_IMG['image']); 
  187.  
  188. 		/**
  189. 		 * Set the correct widht/height etc...
  190. 		 */
  191. 		$_IMG['image_imagew']	= imagesx ($_IMG['image_image']); 
  192. 		$_IMG['image_imageh']	= imagesy ($_IMG['image_image']); 
  193. 		$_IMG['image_markw']	= imagesx ($_IMG['image_mark']); 
  194. 		$_IMG['image_markh']	= imagesy ($_IMG['image_mark']); 
  195.  
  196. 		/**
  197. 		 * Make sure we use the correct position of the watermark
  198. 		 */
  199. 		if ($_IMG['hposition'] == 0)
  200. 			$_IMG['hposition']	= ($_IMG['image_imageh'] - $_IMG['image_markh']);
  201.  
  202. 		if ($_IMG['wposition'] == 0)
  203. 			$_IMG['wposition']	= 5;
  204.  
  205. 		/**
  206. 		 * Create the watermark
  207. 		 */
  208. 		imagecopymerge ($_IMG['image_image'], $_IMG['image_mark'], $_IMG['wposition'], $_IMG['hposition'], 0, 0, $_IMG['image_markw'], $_IMG['image_markh'], $_IMG['transparency']); 
  209.  
  210. 		/**
  211. 		 * Set the correct content header
  212. 		 */
  213. 		header ('Content-Type: ' . $_IMG['iinfo'][0]);
  214.  
  215. 		/**
  216. 		 * Create the image
  217. 		 */
  218. 		$_IMG['iinfo'][2] ($_IMG['image_image'], '', 100);
  219.  
  220. 		/**
  221. 		 * Destroy the image
  222. 		 */
  223. 		imagedestroy ($_IMG['image_image']);
  224.  
  225. 		/**
  226. 		 * Return true
  227. 		 */
  228. 		return true;
  229. 	}
  230. }
  231. ?>
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