The image cropping and scaling function supports Square and custom coordinate cropping. /** * The Image cropping function supports the specified fixed-point cropping and orientation cropping modes. * @ Param <string> $ src_file original image path * @ Param <int> $ new_width: width of the cropped image (when the width of the cropped image exceeds the width of the original image, remove the width of the original image) * @ Param <int> $ new_height: specifies the height of the cropped image. When the width of the cropped image exceeds the width of the original image, remove the original image height) * @ Param <int> $ type: cropping in 1-azimuth mode and cropping in 0-fixed point mode. * @ Param <int> $ starting orientation of pos orientation cropping (this parameter does not work when the fixed-point cropping mode is selected) * 1 is the top left, 2 is the top center, and 3 is the top right; * 4: center left, 5: center, and 6: center right; * 7 indicates that the bottom is left, 8 indicates that the bottom is center, and 9 indicates that the bottom is right; * @ Param <int> $ start_x start position X (this parameter does not work when the orientation mode is selected for cropping) * @ Param <int> $ start_y start position Y (this parameter does not work when the orientation mode is selected for cropping) * @ Return <string> crop the image storage path */ Function thumb ($ src_file, $ new_width, $ new_height, $ type = 1, $ pos = 5, $ start_x = 0, $ start_y = 0 ){ $ Pathinfo = pathinfo ($ src_file ); $ Dst_file = $ pathinfo ['dirname']. '/'. $ pathinfo ['filename']. '_'. $ new_width. 'X '. $ new_height. '. '. $ pathinfo ['extension']; If (! File_exists ($ dst_file )){ If ($ new_width <1 | $ new_height <1 ){ Echo "params width or height error! "; Exit (); } If (! File_exists ($ src_file )){ Echo $ src_file. "is not exists! "; Exit (); } // Image type $ Img_type = exif_imagetype ($ src_file ); $ Support_type = array (IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_GIF ); If (! In_array ($ img_type, $ support_type, true )){ Echo "only jpg, png, and gif image cropping is supported "; Exit (); } /* Load the image */ Switch ($ img_type ){ Case IMAGETYPE_JPEG: $ Src_img = imagecreatefromjpeg ($ src_file ); Break; Case IMAGETYPE_PNG: $ Src_img = imagecreatefrompng ($ src_file ); Break; Case IMAGETYPE_GIF: $ Src_img = imagecreatefromgif ($ src_file ); Break; Default: Echo "image loading error! "; Exit (); } /* Obtain the width and height of the source image */ $ Src_width = imagesx ($ src_img ); $ Src_height = imagesy ($ src_img ); /* Calculate the width and height of the cut Image */ $ Mid_width = ($ src_width <$ new_width )? $ Src_width: $ new_width; $ Mid_height = ($ src_height <$ new_height )? $ Src_height: $ new_height; /* Initialize the coordinates of the starting position of the source image cropping */ Switch ($ pos * $ type ){ Case 1: // 1 is the top left $ Start_x = 0; $ Start_y = 0; Break; Case 2: // 2 center the top $ Start_x = ($ src_width-$ mid_width)/2; $ Start_y = 0; Break; Case 3: // 3: top right $ Start_x = $ src_width-$ mid_width; $ Start_y = 0; Break; Case 4: // 4 is left in the middle $ Start_x = 0; $ Start_y = ($ src_height-$ mid_height)/2; Break; Case 5: // 5 center in the middle $ Start_x = ($ src_width-$ mid_width)/2; $ Start_y = ($ src_height-$ mid_height)/2; Break; Case 6: // 6 is the center and right $ Start_x = $ src_width-$ mid_width; $ Start_y = ($ src_height-$ mid_height)/2; Break; Case 7: // 7 is left at the bottom $ Start_x = 0; $ Start_y = $ src_height-$ mid_height; Break; Case 8: // 8 is centered at the bottom $ Start_x = ($ src_width-$ mid_width)/2; $ Start_y = $ src_height-$ mid_height; Break; Case 9: // 9: right $ Start_x = $ src_width-$ mid_width; $ Start_y = $ src_height-$ mid_height; Break; Default: // random Break; } // Create a background canvas for the cut Image $ Mid_img = imagecreatetruecolor ($ mid_width, $ mid_height ); // Copy the cut image data to the canvas to generate the cut Image Imagecopy ($ mid_img, $ src_img, 0, 0, $ start_x, $ start_y, $ mid_width, $ mid_height ); // Create a background canvas for the cropped image $ New_img = imagecreatetruecolor ($ new_width, $ new_height ); // Copy and cut the image to the background canvas and crop it proportionally. Imagecopyresampled ($ new_img, $ mid_img, 0, 0, 0, 0, $ new_width, $ new_height, $ mid_width, $ mid_height ); /* Save as image by format */ Switch ($ img_type ){ Case IMAGETYPE_JPEG: Imagejpeg ($ new_img, $ dst_file, 100 ); Break; Case IMAGETYPE_PNG: Imagepng ($ new_img, $ dst_file, 9 ); Break; Case IMAGETYPE_GIF: Imagegif ($ new_img, $ dst_file, 100 ); Break; Default: Break; } } Return ltrim ($ dst_file ,'.'); } |