使用GD库裁剪/调整图像功能

本文介绍了使用GD库裁剪/调整图像功能的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的脚本可以运行，但是我希望调用它

My script works however I wish to call upon this

// Example resize_crop_image(max_width, max_height, source_file, dst_dir); // Should-be Calling??? resize_crop_image(120, 120, $name, UPLOAD_DIR);

下面是我的完整脚本，没有调用此函数进行裁剪然后重新调整大小.我已经尝试了几种方法，但我相信这只是我只是想念的东西或者还没有理解...

Below is my fully working script without calling upon this function to crop then resize. I have tried several ways and I believe it is something simply I just am missing or do notyet understand...

define("UPLOAD_DIR", "../Desktop/IMG/BananzaNews/Thumbs/"); if (!empty($_FILES["file"])) { $myFile = $_FILES["file"]; if ($myFile["error"] !== UPLOAD_ERR_OK) { echo "<p>An error occurred.</p>"; exit; } // verify the file is a GIF, JPEG, or PNG $fileType = exif_imagetype($_FILES["file"]["tmp_name"]); $allowed = array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG); if (!in_array($fileType, $allowed)) { // file type is not permitted } else { // ensure a safe filename $name = preg_replace("/[^A-Z0-9._-]/i", "_", $myFile["name"]); // don't overwrite an existing file $i = 0; $parts = pathinfo($name); while (file_exists(UPLOAD_DIR . $name)) { $i++; $name = $parts["filename"] . "-" . $i . "." . $parts["extension"]; } //resize and crop image by center function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 80){ $imgsize = getimagesize($source_file); $width = $imgsize[0]; $height = $imgsize[1]; $mime = $imgsize['mime']; switch($mime){ case 'image/gif': $image_create = "imagecreatefromgif"; $image = "imagegif"; break; case 'image/png': $image_create = "imagecreatefrompng"; $image = "imagepng"; $quality = 7; break; case 'image/jpeg': $image_create = "imagecreatefromjpeg"; $image = "imagejpeg"; $quality = 80; break; default: return false; break; } $dst_img = imagecreatetruecolor($max_width, $max_height); $src_img = $image_create($source_file); $width_new = $height * $max_width / $max_height; $height_new = $width * $max_height / $max_width; //if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa if($width_new > $width){ //cut point by height $h_point = (($height - $height_new) / 2); //copy image imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new); }else{ //cut point by width $w_point = (($width - $width_new) / 2); imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height); } $image($dst_img, $dst_dir, $quality); if($dst_img)imagedestroy($dst_img); if($src_img)imagedestroy($src_img); } // preserve file from temporary directory $success = move_uploaded_file($myFile["tmp_name"], UPLOAD_DIR . $name); $img = "www.rafflebananza/Desktop/IMG/BananzaNews/Thumbs/" . $_FILES["file"]["name"]; if (!$success) { echo "<p>Unable to save file.</p>"; exit; } // set proper permissions on the new file chmod(UPLOAD_DIR . $name, 0644); } } else { die("An error occurred uploading ".$_FILES["file"]["error"].": ".$sql); }

推荐答案

这里是一个使用您所拥有内容的类.它将保存您的文件到您想要的任何大小尺寸.我已将其标记为您的理解:

Here is a class that uses what you have plus a bit more. It will save your file to whatever size dimensions you want. I have notated it for your understanding:

class ImageFactory { protected $original; public $destination; public function FetchOriginal($file) { $size = getimagesize($file); $this->original['width'] = $size[0]; $this->original['height'] = $size[1]; $this->original['type'] = $size['mime']; return $this; } public function Thumbnailer($thumb_target = '', $width = 60,$height = 60,$SetFileName = false, $quality = 80) { // Set original file settings $this->FetchOriginal($thumb_target); // Determine kind to extract from if($this->original['type'] == 'image/gif') $thumb_img = imagecreatefromgif($thumb_target); elseif($this->original['type'] == 'image/png') { $thumb_img = imagecreatefrompng($thumb_target); $quality = 7; } elseif($this->original['type'] == 'image/jpeg') $thumb_img = imagecreatefromjpeg($thumb_target); else return false; // Assign variables for calculations $w = $this->original['width']; $h = $this->original['height']; // Calculate proportional height/width if($w > $h) { $new_height = $height; $new_width = floor($w * ($new_height / $h)); $crop_x = ceil(($w - $h) / 2); $crop_y = 0; } else { $new_width = $width; $new_height = floor( $h * ( $new_width / $w )); $crop_x = 0; $crop_y = ceil(($h - $w) / 2); } // New image $tmp_img = imagecreatetruecolor($width,$height); // Copy/crop action imagecopyresampled($tmp_img, $thumb_img, 0, 0, $crop_x, $crop_y, $new_width, $new_height, $w, $h); // If false, send browser header for output to browser window if($SetFileName == false) header('Content-Type: '.$this->original['type']); // Output proper image type if($this->original['type'] == 'image/gif') imagegif($tmp_img); elseif($this->original['type'] == 'image/png') ($SetFileName !== false)? imagepng($tmp_img, $SetFileName, $quality) : imagepng($tmp_img); elseif($this->original['type'] == 'image/jpeg') ($SetFileName !== false)? imagejpeg($tmp_img, $SetFileName, $quality) : imagejpeg($tmp_img); // Destroy set images if(isset($thumb_img)) imagedestroy($thumb_img); // Destroy image if(isset($tmp_img)) imagedestroy($tmp_img); } }

用法示例:

// Initiate class $ImageMaker = new ImageFactory(); // Here is just a test landscape sized image $thumb_target = 'media1.santabanta/full6/Outdoors/Landscapes/landscapes-246a.jpg'; // This will save the file to disk. $destination is where the file will save and with what name $destination = 'image60px.jpg'; $ImageMaker->Thumbnailer($thumb_target,120,120,$destination); // This example will just display to browser, not save to disk // $ImageMaker->Thumbnailer($thumb_target,120,120);