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PO
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20348275
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2013-12-03T10:15:45.460
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2013-12-06T06:52:29.533
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2013-12-06T06:52:29.533
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19942666
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I have written a class for manipulating images, save this as a php file and include in your code: <pre><code>Class Resize { //Variables private $image; private $width; private $height; private $imageResized; private $imageAplha; function __construct($fileName, $tmpFile = NULL) { //Open Image $this->image = $this->openImage($fileName, $tmpFile); //Get width and height $this->width = imagesx($this->image); $this->height = imagesy($this->image); } private function openImage($file, $tmpFile = NULL) { //Get extension $extension = strtolower(pathinfo($file, PATHINFO_EXTENSION)); if ($tmpFile != NULL) { $cfile = $tmpFile; } else { $cfile = $file; } switch ($extension) { case 'jpg': case 'jpeg': $img = @imagecreatefromjpeg($cfile); $this->imageAplha = false; break; case 'gif': $img = @imagecreatefromgif($cfile); $this->imageAplha = false; break; case 'png': $img = @imagecreatefrompng($cfile); imagealphablending($img, true); $this->imageAplha = true; break; default: $img = false; break; } return $img; } public function resizeImage($newWidth, $newHeight, $option = "auto") { //Get optimal width and height ( based on option ) $optionArray = $this->getDimensions($newWidth, $newHeight, $option); $optimalWidth = $optionArray['optimalWidth']; $optimalHeight = $optionArray['optimalHeight']; //Resample - Create image canvas of w, h size $this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight); if ($this->imageAplha) { imagealphablending($this->imageResized, false); imagesavealpha($this->imageResized, true); } imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height); //If CROP if ($option == 'crop') { $this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight); } } private function getDimensions($newWidth, $newHeight, $option) { switch ($option) { case 'exact': $optimalWidth = $newWidth; $optimalHeight = $newHeight; break; case 'portrait': $optimalWidth = $this->getSizeByFixedHeight($newHeight); $optimalHeight = $newHeight; break; case 'landscape': $optimalWidth = $newWidth; $optimalHeight = $this->getSizeByFixedWidth($newWidth); break; case 'auto': $optionArray = $this->getSizeByAuto($newWidth, $newHeight); $optimalWidth = $optionArray['optimalWidth']; $optimalHeight = $optionArray['optimalHeight']; break; case 'crop': $optionArray = $this->getOptimalCrop($newWidth, $newHeight); $optimalWidth = $optionArray['optimalWidth']; $optimalHeight = $optionArray['optimalHeight']; break; } return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight); } private function getSizeByFixedHeight($newHeight) { $ratio = $this->width / $this->height; $newWidth = $newHeight * $ratio; return $newWidth; } private function getSizeByFixedWidth($newWidth) { $ratio = $this->height / $this->width; $newHeight = $newWidth * $ratio; return $newHeight; } private function getSizeByAuto($newWidth, $newHeight) { if ($this->height < $this->width) { //Image to be resized is wider (landscape) $optimalWidth = $newWidth; $optimalHeight = $this->getSizeByFixedWidth($newWidth); } elseif ($this->height > $this->width) { //Image to be resized is taller (portrait) $optimalWidth = $this->getSizeByFixedHeight($newHeight); $optimalHeight = $newHeight; } else { //Image to be resizerd is a square if ($newHeight < $newWidth) { $optimalWidth = $newWidth; $optimalHeight = $this->getSizeByFixedWidth($newWidth); } else if ($newHeight > $newWidth) { $optimalWidth = $this->getSizeByFixedHeight($newHeight); $optimalHeight = $newHeight; } else { //Sqaure being resized to a square $optimalWidth = $newWidth; $optimalHeight = $newHeight; } } return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight); } private function getOptimalCrop($newWidth, $newHeight) { $heightRatio = $this->height / $newHeight; $widthRatio = $this->width / $newWidth; if ($heightRatio < $widthRatio) { $optimalRatio = $heightRatio; } else { $optimalRatio = $widthRatio; } $optimalHeight = $this->height / $optimalRatio; $optimalWidth = $this->width / $optimalRatio; return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight); } private function crop($optimalWidth, $optimalHeight, $newWidth, $newHeight) { //Find center - this will be used for the crop $cropStartX = ( $optimalWidth / 2) - ( $newWidth / 2 ); $cropStartY = ( $optimalHeight / 2) - ( $newHeight / 2 ); $crop = $this->imageResized; //Now crop from center to exact requested size $this->imageResized = imagecreatetruecolor($newWidth, $newHeight); if ($this->imageAplha) { imagealphablending($this->imageResized, false); imagesavealpha($this->imageResized, true); } imagecopyresampled($this->imageResized, $crop, 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight, $newWidth, $newHeight); } public function saveImage($savePath, $imageQuality = "100") { //Get extension $extension = strtolower(pathinfo($savePath, PATHINFO_EXTENSION)); switch ($extension) { case 'jpg': case 'jpeg': if (imagetypes() & IMG_JPG) { imagejpeg($this->imageResized, $savePath, $imageQuality); } break; case 'gif': if (imagetypes() & IMG_GIF) { imagegif($this->imageResized, $savePath); } break; case 'png': //Scale quality from 0-100 to 0-9 $scaleQuality = round(($imageQuality / 100) * 9); //Invert quality setting as 0 is best, not 9 $invertScaleQuality = 9 - $scaleQuality; if (imagetypes() & IMG_PNG) { imagepng($this->imageResized, $savePath, $invertScaleQuality); } break; default: //No extension - No save. break; } imagedestroy($this->imageResized); } } </code></pre> You can then call and resize/crop the image using: <pre><code>$resizeObj = new resize([filetomanipulate]); $resizeObj->resizeImage([width], [height], [exact, portrait, landscape, auto, crop]); $resizeObj->saveImage([outputfilename], [quality{0-100}]); </code></pre> Hope you find this helpful.. Happy coding :)
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1. POphp how to crop image then stretch to prevent black bar
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