PHP工具类 图片裁剪类封装
<?php
namespace App\Utils;/*** 图片裁剪工具类* @author 田小涛* @date 2020年7月23日* @comment**/
class ImageCropUtils
{private $sImage;private $dImage;private $src_file;private $dst_file;private $src_width;private $src_height;private $src_ext;private $src_type;private $mime;//上传基础路径处private $basisUploadPath;public function __construct( $file = null, $distFile = null ){$this->dst_file = $distFile;$this->basisUploadPath = storage_path( 'app/uploads/' );if( isset( $file ) && $file ){$this->src_file = $file;$this->init( $file );}}/*** 生成唯一的文件名称* @author Administrator* @datetime 2019年12月24日 上午11:44:02* @comment * * @param string $salt* @return string*/protected function getUniqueDiskName($salt = ''){if( empty( $salt ) ){$salt = mt_rand(1,1000000);}list($usec, $sec) = explode(" ", microtime());$micros = str_replace('.', '', ((float)$usec + (float)$sec)).$salt;return md5( $micros );}/*** 初始化参数* @author Administrator* @datetime 2020年7月22日 下午3:00:22* @comment * * @return boolean*/public function init( $url ){$strExt = $this->getImgExt( $url );$filename = $this->getUniqueDiskName( md5( $url ) );$path = date( 'y' ) . '/' . date( 'm' ) . '/' . date( 'd' ) . '/' . $filename;$dowRes = new \generalDowmload( $url, $path . $strExt );if( !empty( $dowRes ) && isset( $dowRes->basename ) ){if( isset( $dowRes->location ) && strlen( $dowRes->location ) ){$this->src_file = $dowRes->location;}else{$this->src_file = $this->basisUploadPath . $path . $strExt;}}else{return false;}if( !isset( $this->src_file ) || is_null( $this->src_file ) || !file_exists( $this->src_file ) ){return false;}$arrImageInfos = @getimagesize( $this->src_file );if( !isset( $arrImageInfos ) || empty( $arrImageInfos ) ){return false;}if( isset( $arrImageInfos[0] ) && $arrImageInfos[0] ){$this->src_width = $arrImageInfos[0];}if( isset( $arrImageInfos[1] ) && $arrImageInfos[1] ){$this->src_height = $arrImageInfos[1];}$this->src_type = 2;if( isset( $arrImageInfos[2] ) && $arrImageInfos[2] ){$this->src_type = $arrImageInfos[2];}if( isset( $arrImageInfos[ 'mime' ] ) ){$this->mime = $arrImageInfos[ 'mime' ];}switch( $this->src_type ) {case IMAGETYPE_JPEG :ini_set( 'gd.jpeg_ignore_warning', true );$this->sImage = @imagecreatefromjpeg( $this->src_file );$this->ext = 'jpg';if( !isset( $this->mime ) || strlen( $this->mime ) <= 0 ){$this->mime = 'image/jpeg';}break;case IMAGETYPE_PNG :$this->sImage = @imagecreatefrompng( $this->src_file );$this->ext = 'png';if( !isset( $this->mime ) || strlen( $this->mime ) <= 0 ){$this->mime = 'image/' . $this->ext;}break;case IMAGETYPE_GIF :$this->sImage = imagecreatefromgif( $this->src_file );$this->ext = 'gif';if( !isset( $this->mime ) || strlen( $this->mime ) <= 0 ){$this->mime = 'image/' . $this->ext;;}break;case 18:$this->sImage = @imagecreatefromwebp( $this->src_file );$this->ext = 'webp';if( !isset( $this->mime ) || strlen( $this->mime ) <= 0 ){$this->mime = 'image/' . $this->ext;;}break;default:return false;}return true;}/*** 裁剪* @author Administrator* @datetime 2020年7月22日 下午3:07:36* @comment * * @param unknown $dst_width* @param unknown $dst_height* @param unknown $dst_x* @param unknown $dst_y* @param string $dst_file* @return boolean*/public function cutImage( $dst_width, $dst_height, $dst_x, $dst_y, $originWidth, $originHeight ){if( !$dst_width || !$dst_height ){return false;}# 创建画布时，判断最终需要的画布大小if ($originWidth && $originHeight){$dst_w = $originWidth;$dst_h = $originHeight;} else{$dst_w = $dst_width;$dst_h = $dst_height;}$this->dImage = imagecreatetruecolor( $dst_w, $dst_h ); //创建了目标文件的大小的画布$bg = imagecolorallocatealpha( $this->dImage, 255, 255, 255, 127 ); //给画布分配颜色imagefill( $this->dImage, 0, 0, $bg ); //给图像用颜色进行填充imagecolortransparent( $this->dImage, $bg ); //背景定义成透明色$ratio_w = 1.0 * $dst_width / $this->src_width; //横向缩放的比例$ratio_h = 1.0 * $dst_height / $this->src_height; //纵向缩放的比例//不进行缩放,直接对图像进行裁剪$ratio = 1.0;$tmp_w = (int)($dst_width / $ratio);$tmp_h = (int)($dst_height / $ratio);$tmp_img = imagecreatetruecolor( $dst_width, $dst_height ); //创建暂时保存的画布imagecopy( $tmp_img, $this->sImage, 0, 0, $dst_x,$dst_y, $dst_width, $dst_height ); //拷贝出图像的一部分,进行裁切imagecopyresampled( $this->dImage, $tmp_img, 0, 0, 0, 0, $dst_w, $dst_h, $tmp_w, $tmp_h ); //把暂时缓存的图片,放到目标文件里面imagedestroy( $tmp_img );return true;}/*** 存储* @author Administrator* @datetime 2020年7月22日 下午3:15:52* @comment * * @param unknown $file* @return boolean*/public function save( $file = null ){if( !isset( $file ) || is_null( $file ) ){$this->dst_file = $this->src_file;}else{$this->dst_file = $this->basisUploadPath . '/'. $file;}try{switch( $this->src_type ){case IMAGETYPE_JPEG :@imagejpeg( $this->dImage, $this->dst_file, 98 );break;case IMAGETYPE_PNG :imagepng( $this->dImage, $this->dst_file );break;case IMAGETYPE_GIF :imagegif( $this->dImage, $this->dst_file );break;case 18:@imagejpeg( $this->dImage, $this->dst_file, 98 );break;default:return false;}}catch( \Exception $e ){}$strExt = $this->getImgExt( $this->dst_file );$tmpImageInfo = @getimagesize( $this->dst_file );$width = 0;$height = 0;if( isset( $tmpImageInfo[0] ) && $tmpImageInfo[0] > 0 ){$width = $tmpImageInfo[0];}if( isset( $tmpImageInfo[1] ) && $tmpImageInfo[1] > 0 ){$height = $tmpImageInfo[1];}$objRet = new \stdClass();$objRet->mime = $this->mime;$objRet->filename = basename( $this->dst_file );$objRet->ext = $strExt;$objRet->width = $width;$objRet->height = $height;return $objRet;}/*** 数据销毁* @author Administrator* @datetime 2020年7月22日 下午3:31:12* @comment **/public function destroy(){imagedestroy( $this->sImage);imagedestroy( $this->dImage );@unlink( $this->src_file );return true;}/*** 检索图集是否存在后缀* 若不存在-则使用默认（强制转换）* @author Administrator* @datetime 2018年11月27日 下午3:30:47* @comment** @param unknown $url* @return string|unknown*/protected function getImgExt( $url ){$iLastSlash = strrpos( $url, '/' );$strFileName = mb_substr( $url, intval($iLastSlash+1) );$strExt = strrchr( $strFileName, '.' );preg_match( "/(.*?)\?.*?/", $strExt, $matches );if( !empty( $matches ) && isset( $matches[1] ) ){$strExt = $matches[1];}if( false == $strExt || is_null( $strExt ) || strlen( $strExt ) <= 0 ){$strExt = '.jpg';}return $strExt;}}
)
