note 80935 added to function.imagecolortransparent

This is my 'perfect' (i use that word lightly) thumbnail generation script, switch '$transparency' to true to have it do its best to handle transparency in gifs and pngs. this code is built off of comments and advice of everyone else here, and i do not deserve full credit. So far this handles every error i can throw at it. <?php function createthumb($name, $newname, $new_w, $new_h, $border=false, $transparency=true, $base64=false) { if(file_exists($newname)) @unlink($newname); if(!file_exists($name)) return false; $arr = split("\.",$name); $ext = $arr[count($arr)-1]; if($ext=="jpeg" || $ext=="jpg"){ $img = @imagecreatefromjpeg($name); } elseif($ext=="png"){ $img = @imagecreatefrompng($name); } elseif($ext=="gif") { $img = @imagecreatefromgif($name); } if(!$img) return false; $old_x = imageSX($img); $old_y = imageSY($img); if($old_x < $new_w && $old_y < $new_h) { $thumb_w = $old_x; $thumb_h = $old_y; } elseif ($old_x > $old_y) { $thumb_w = $new_w; $thumb_h = floor(($old_y*($new_h/$old_x))); } elseif ($old_x < $old_y) { $thumb_w = floor($old_x*($new_w/$old_y)); $thumb_h = $new_h; } elseif ($old_x == $old_y) { $thumb_w = $new_w; $thumb_h = $new_h; } $thumb_w = ($thumb_w<1) ? 1 : $thumb_w; $thumb_h = ($thumb_h<1) ? 1 : $thumb_h; $new_img = ImageCreateTrueColor($thumb_w, $thumb_h); if($transparency) { if($ext=="png") { imagealphablending($new_img, false); $colorTransparent = imagecolorallocatealpha($new_img, 0, 0, 0, 127); imagefill($new_img, 0, 0, $colorTransparent); imagesavealpha($new_img, true); } elseif($ext=="gif") { $trnprt_indx = imagecolortransparent($img); if ($trnprt_indx >= 0) { //its transparent $trnprt_color = imagecolorsforindex($img, $trnprt_indx); $trnprt_indx = imagecolorallocate($new_img, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']); imagefill($new_img, 0, 0, $trnprt_indx); imagecolortransparent($new_img, $trnprt_indx); } } } else { Imagefill($new_img, 0, 0, imagecolorallocate($new_img, 255, 255, 255)); } imagecopyresampled($new_img, $img, 0,0,0,0, $thumb_w, $thumb_h, $old_x, $old_y); if($border) { $black = imagecolorallocate($new_img, 0, 0, 0); imagerectangle($new_img,0,0, $thumb_w, $thumb_h, $black); } if($base64) { ob_start(); imagepng($new_img); $img = ob_get_contents(); ob_end_clean(); $return = base64_encode($img); } else { if($ext=="jpeg" || $ext=="jpg"){ imagejpeg($new_img, $newname); $return = true; } elseif($ext=="png"){ imagepng($new_img, $newname); $return = true; } elseif($ext=="gif") { imagegif($new_img, $newname); $return = true; } } imagedestroy($new_img); imagedestroy($img); return $return; } //example useage createthumb("img.gif", "tn_img.gif", 64,64,true, true, false); ?> ---- Server IP: 208.69.120.35 Probable Submitter: 198.242.211.102 ---- Manual Page -- http://www.php.net/manual/en/function.imagecolortransparent.php Edit -- https://master.php.net/note/edit/80935 Del: integrated -- https://master.php.net/note/delete/80935/integrated Del: useless -- https://master.php.net/note/delete/80935/useless Del: bad code -- https://master.php.net/note/delete/80935/bad+code Del: spam -- https://master.php.net/note/delete/80935/spam Del: non-english -- https://master.php.net/note/delete/80935/non-english Del: in docs -- https://master.php.net/note/delete/80935/in+docs Del: other reasons-- https://master.php.net/note/delete/80935 Reject -- https://master.php.net/note/reject/80935 Search -- https://master.php.net/manage/user-notes.php