PHP implementation upload cropping image

This article mainly and everyone to share the PHP implementation of upload cropping images, mainly in the form of code and we share, hope to help everyone.

/Picture clipping upload//$source _path = ' E:\www\cylxsh\storage\app\\ '. $url; The original path $source _path = Storage_path (' app\\ '. $url); Original path $target _width = 1000; Target width $target _height = 100; Target height $source _info = getimagesize ($source _path); Get image information $source _width = $source _info[0]; Original width $source _height = $source _info[1]; Original height $source _mime = $source _info[' mime '); File type $source _ratio = $source _height/$source _width; The original proportion $target _ratio = $target _height/$target _width;  Target ratio//source graph too high if ($source _ratio > $target _ratio) {$cropped _width = $source _width;// The width of the crop $cropped _height = $source _width * $target _ratio;            The height of the cut $source _x = 0;        $source _y = ($source _height-$cropped _height)/2; }//source map too wide ElseIf ($source _ratio < $target _ratio) {$cropped _width = $source _height/$t            Arget_ratio; $cropped _height = $source_height;            $source _x = ($source _width-$cropped _width)/2;        $source _y = 0;            }//Source graph moderate Else {$cropped _width = $source _width;            $cropped _height = $source _height;            $source _x = 0;        $source _y = 0; } switch ($source _mime) {case ' image/gif ': $source _image = Imagecreatefromgif ($so                Urce_path);            Break                Case ' image/jpeg ': $source _image = imagecreatefromjpeg ($source _path);            Break                Case ' image/png ': $source _image = imagecreatefrompng ($source _path);            Break                Default:return false;        Break        } $target _image = Imagecreatetruecolor ($target _width, $target _height);        $cropped _image = Imagecreatetruecolor ($cropped _width, $cropped _height); Crop Imagecopy ($cropped _image, $source _image, 0, 0, $source _x, $source _y, $cropped _width, $cropped _height); Zoom imagecopyresampled ($target _image, $cropped _image, 0, 0, 0, 0, $target _width, $target _height, $cropped _width,        $cropped _height);        Set the random file name $chars =null;        $len = 50;        if (Is_null ($chars)) {$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        } mt_srand (10000000* (double) microtime ()); for ($i = 0, $fileName = ", $LC = strlen ($chars)-1; $i < $len; $i + +) {$fileName. = $chars [Mt_rand (0, $LC)]        ; }//Save the picture to the local $res = Imagepng ($target _image,storage_path (' \app\uploads\\ '. Date (' Y '). ' \ \ '. Date (' m '). ' \ \ '. Date (' d '). '        \ \ '. $fileName));            if ($res = = True) {unlink (Storage_path (' app\\ '. $url)); $url = Storage_path (' \app\uploads\\ '. Date (' Y '). ' \ \ '. Date (' m '). ' \ \ '. Date (' d '). '        \ \ '. $fileName);        }else{return View ("Alert", ["msg" = "image upload failed"]); }