Is there any function for create thumbnail image in php?

Is there any function for cr开发者_Go百科eate thumbnail image in php ?

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There's no single function that will create the thumbnail for you, but there are several functions that are part of the GD library, like imagecreatetruecolor and imagecopyresampled. The best thing you could do is start with a tutorial, Google knows best here:

http://www.google.co.uk/search?q=gd+php+thumbnail

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you have a GD library function for image creation...pls follow the URL

http://php.net/manual/en/book.image.php

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You can use the following code to generate the image thumbnail without changing the aspect ratio of the original image. And here $img is the path of image where original image is stored.

            $sourceAppImgPath = $this->images->absPath($img);
            $file_dimensions = getimagesize($sourceAppImgPath);
            $ImageType = strtolower($file_dimensions['mime']);

                switch(strtolower($ImageType))
                {
                    case 'image/png':
                        $image = imagecreatefrompng($sourceAppImgPath);
                        break;
                    case 'image/gif':
                        $image = imagecreatefromgif($sourceAppImgPath);
                        break;
                    case 'image/jpeg':
                        $image = imagecreatefromjpeg($sourceAppImgPath);
                        break;
                    default:
                        return false; //output error
                }

                    $origWidth = imagesx($image);
                    $origHeight = imagesy($image);
                    $maxWidth = 300;
                    $maxHeight =300;

                    if ($maxWidth == 0)
                        $maxWidth  = $origWidth;

                    if ($maxHeight == 0)
                        $maxHeight = $origHeight;

                    $widthRatio = $maxWidth / $origWidth;
                    $heightRatio = $maxHeight / $origHeight;
                    $ratio = min($widthRatio, $heightRatio);
                    $thumb_width  = (int)$origWidth  * $ratio;
                    $thumb_height = (int)$origHeight * $ratio;