原生PHP上传图片并且裁剪图片生成推广海报

<?phpini_set('memory_limit', '-1');
/***生成宣传海报* @param array 参数,包括图片和文字* @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片* @return [type] [description]*/
function createPoster($config = array(), $filename = "")
{//如果要看报什么错，可以先注释调这个headerif (empty($filename)) {header("content-type: image/png");}$imageDefault = array('left' => 0,'right' => 0,'bottom' => 0,'width' => 100,'height' => 100,'opacity' => 100);$textDefault = array('text' => '','left' => 0,'fontSize' => 32, //字号'fontColor' => '255,255,255', //字体颜色'angle' => 0,);$background = $config['background'];//海报最底层得背景//背景方法$backgroundInfo = getimagesize($background);$backgroundFun = 'imagecreatefrom' . image_type_to_extension($backgroundInfo[2], false);$background = $backgroundFun($background);$backgroundWidth = imagesx($background); //背景宽度$backgroundHeight = imagesy($background); //背景高度$imageRes = imageCreatetruecolor($backgroundWidth, $backgroundHeight);$color = imagecolorallocate($imageRes, 0, 0, 0);imagefill($imageRes, 0, 0, $color);// imageColorTransparent($imageRes, $color); //颜色透明imagecopyresampled($imageRes,$background,0,0,0,0,imagesx($background),imagesy($background),imagesx($background),imagesy($background));//处理了图片if (!empty($config['image'])) {foreach ($config['image'] as $key => $val) {$val = array_merge($imageDefault, $val);$info = getimagesize($val['url']);$function = 'imagecreatefrom' . image_type_to_extension($info[2], false);if ($val['stream']) {//如果传的是字符串图像流$info = getimagesizefromstring($val['url']);$function = 'imagecreatefromstring';}$res = $function($val['url']);$resWidth = $info[0];$resHeight = $info[1];//建立画板 ，缩放图片至指定尺寸$canvas = imagecreatetruecolor($val['width'], $val['height']);imagefill($canvas, 0, 0, $color);//关键函数，//参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h）imagecopyresampled($canvas,$res,0,0,0,0,$val['width'],$val['height'],$resWidth,$resHeight);$val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) - $val['width'] : $val['left'];;$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) - $val['height'] : $val['top'];//放置图像imagecopymerge($imageRes,$canvas,$val['left'],$val['top'],$val['right'],$val['bottom'],$val['width'],$val['height'],$val['opacity']);//左，上，右，下，宽度，高度，透明度}}//处理文字if (!empty($config['text'])) {foreach ($config['text'] as $key => $val) {$val = array_merge($textDefault, $val);list($R, $G, $B) = explode(',', $val['fontColor']);$fontColor = imagecolorallocate($imageRes, $R, $G, $B);$val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) : $val['left'];$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) : $val['top'];imagettftext($imageRes,$val['fontSize'],$val['angle'],$val['left'],$val['top'],$fontColor,$val['fontPath'],$val['text']);}}//生成图片if (!empty($filename)) {$res = imagejpeg($imageRes, $filename, 90); //保存到本地imagedestroy($imageRes);if (!$res) return false;return $filename;} else {imagejpeg($imageRes); //在浏览器上显示imagedestroy($imageRes);}
}/*** 裁剪圆角* @param string $imgpath* @param int $radius* @return false|GdImage|resource*/
function radius_img($imgpath = 'image/ditu.jpg', $radius = 15) {$ext     = pathinfo($imgpath);$src_img = null;switch ($ext['extension']) {case 'jpg':
//            $src_img = imagecreatefromjpeg($imgpath);$src_img = imagecreatefromstring(file_get_contents($imgpath));break;case 'png':
//            $src_img = imagecreatefrompng($imgpath);$src_img = imagecreatefromstring(file_get_contents($imgpath));break;default:$src_img = imagecreatefromstring(file_get_contents($imgpath));break;}$wh = getimagesize($imgpath);$w  = $wh[0];$h  = $wh[1];// $radius = $radius == 0 ? (min($w, $h) / 2) : $radius;$img = imagecreatetruecolor($w, $h);//这一句一定要有imagesavealpha($img, true);//拾取一个完全透明的颜色,最后一个参数127为全透明$bg = imagecolorallocatealpha($img, 255, 255, 255, 127);imagefill($img, 0, 0, $bg);$r = $radius; //圆 角半径for ($x = 0; $x < $w; $x++) {for ($y = 0; $y < $h; $y++) {$rgbColor = imagecolorat($src_img, $x, $y);if (($x >= $radius && $x <= ($w - $radius)) || ($y >= $radius && $y <= ($h - $radius))) {//不在四角的范围内,直接画imagesetpixel($img, $x, $y, $rgbColor);} else {//在四角的范围内选择画//上左$y_x = $r; //圆心X坐标$y_y = $r; //圆心Y坐标if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {imagesetpixel($img, $x, $y, $rgbColor);}//上右$y_x = $w - $r; //圆心X坐标$y_y = $r; //圆心Y坐标if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {imagesetpixel($img, $x, $y, $rgbColor);}//下左$y_x = $r; //圆心X坐标$y_y = $h - $r; //圆心Y坐标if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {imagesetpixel($img, $x, $y, $rgbColor);}//下右$y_x = $w - $r; //圆心X坐标$y_y = $h - $r; //圆心Y坐标if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {imagesetpixel($img, $x, $y, $rgbColor);}}}}return $img;
}/*** 上传图片*/
function uploads()
{$filename=$_FILES['file']['name'];//上传的文件名字，myFile为约定键名，前端与后端要一致if($filename=='' || empty($filename)){echo returnJson(402,'接收的文件为空');die;}$type_name=substr(strrchr($filename, '.'), 1);//获取文件名后缀//如果不是jpg或者png的后缀，则返回错误值if($type_name!='jpg' && $type_name!='png' && $type_name!='jpeg' ){echo returnJson(402,'请上传jpg,png,jpeg格式的文件');die;}$tmp_name=$_FILES['file']['tmp_name'];//文件地址,储存的临时文件名$error=$_FILES['file']['error'];//状态//保存于服务器的路径,文件名为时间戳+格式名$path = 'uploads/image/'.date('Ymd');if(!mkdirs($path)){echo returnJson(402,'文件夹创建失败');die;}$str_name = time().'.'.$type_name;$save_name = $path.'/'.$str_name;move_uploaded_file($tmp_name, $save_name);//保存图片if ($error==0) {$size_src=getimagesize($save_name);$h=$size_src['1'];$max=840;$w=$max;$h=$h*($max/$size_src['0']);//压缩图片$src = getThumb($str_name,$save_name,$w,$h);if(!file_exists($src)){var_dump('图片失效');die;}//裁剪图片imagecropper($src,840,1210);//设置圆角$imgg = radius_img($src, 100);imagegif($imgg, $src);$paths = 'uploads/synthetic/'.date('Ymd');if(!mkdirs($paths)){echo returnJson(402,'文件夹创建失败');die;}$data = hecheng($paths,$src);echo returnJson(200,'上传成功',$data);die;}else{$str = '上传失败';//这些报错在配置文件里修改switch ($error){case 1:$str = "超过了上传文件的最大值，请上传2M以下文件";break;case 2:$str = "上传文件过多，请一次上传20个及以下文件！";break;case 3:$str = "文件并未完全上传，请再次尝试！";break;case 4:$str = "未选择上传文件！";break;case 5:$str = "上传文件为0";break;}echo returnJson(402,$str);die;}
}
function mkdirs($dir, $mode = 0777){if (is_dir($dir) || @mkdir($dir, $mode)) return TRUE;if (!mkdirs(dirname($dir), $mode)) return FALSE;return @mkdir($dir, $mode);
}function returnJson($code,$msg,$data = '')
{$arr = ['code' => $code,'msg' => $msg,'data' => $data,];return json_encode($arr);
}function hecheng($paths,$images)
{$size_src=getimagesize($images);$h=$size_src['1'];if($h > 1210){$h = 1210;}//示例一：生成带有二维码的海报$config = array('image' => array(array('url' => 'image/ewcode.png',     //二维码资源'stream' => 0,'left' => 930,'top' => 90,'right' => 0,'bottom' => 0,'width' => 178,'height' => 178,'opacity' => 100),array('url' => $images,'stream' => 0,'left' => 185,'top' => 420,'right' => 0,'bottom' => 0,'width' => $size_src[0],'height' => $h,'opacity' => 100)),'background' => 'image/dit.jpg'          //背景图);$filename = $paths.'/' . time() . '.png';return createPoster($config,$filename);
}/*** 图片压缩处理* @param string $sFile 图片路径* @param int $iWidth 自定义图片宽度* @param int $iHeight 自定义图片高度*/function getThumb($name,$sFile,$iWidth,$iHeight){//判断该图片是否存在if(!file_exists($sFile)) return $sFile;//压缩图片$sFileNameS = str_replace($name, 's_'.$name, $sFile);//判断是否已压缩图片，若是则返回压缩图片路径if(file_exists($sFileNameS)){return $sFileNameS;}//生成压缩图片，并存储到原图同路径下resizeImage($sFile, $sFileNameS, $iWidth, $iHeight);if(!file_exists($sFileNameS)){return $sFile;}return $sFileNameS;
}/*** 生成图片* @param string $im 源图片路径* @param string $dest 目标图片路径* @param int $maxwidth 生成图片宽* @param int $maxheight 生成图片高*/function resizeImage($im, $dest, $maxwidth, $maxheight) {$img = getimagesize($im);switch ($img[2]) {case 1:$im = @imagecreatefromgif($im);break;case 2:$im = @imagecreatefromjpeg($im);break;case 3:$im = @imagecreatefrompng($im);break;}$pic_width = imagesx($im);$pic_height = imagesy($im);$resizewidth_tag = false;$resizeheight_tag = false;if (($maxwidth && $pic_width > $maxwidth) || ($maxheight && $pic_height > $maxheight)) {if ($maxwidth && $pic_width > $maxwidth) {$widthratio = $maxwidth / $pic_width;$resizewidth_tag = true;}if ($maxheight && $pic_height > $maxheight) {$heightratio = $maxheight / $pic_height;$resizeheight_tag = true;}if ($resizewidth_tag && $resizeheight_tag) {$ratio = $widthratio;}if ($resizewidth_tag && !$resizeheight_tag)$ratio = $widthratio;if ($resizeheight_tag && !$resizewidth_tag)$ratio = $widthratio;$newwidth = $pic_width * $ratio;$newheight = $pic_height * $ratio;if (function_exists("imagecopyresampled")) {$newim = imagecreatetruecolor($newwidth, $newheight);imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $pic_width, $pic_height);} else {$newim = imagecreate($newwidth, $newheight);imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $pic_width, $pic_height);}imagejpeg($newim, $dest);imagedestroy($newim);} else {if ($maxwidth && $pic_width < $maxwidth) {$widthratio = $maxwidth / $pic_width;$resizewidth_tag = true;}if ($maxheight && $pic_height < $maxheight) {$heightratio = $maxheight / $pic_height;$resizeheight_tag = true;}if ($resizewidth_tag && $resizeheight_tag) {$ratio = $widthratio;}if ($resizewidth_tag && !$resizeheight_tag)$ratio = $widthratio;if ($resizeheight_tag && !$resizewidth_tag)$ratio = $widthratio;$newwidth = $pic_width * $ratio;$newheight = $pic_height * $ratio;if (function_exists("imagecopyresampled")) {$newim = imagecreatetruecolor($newwidth, $newheight);imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $pic_width, $pic_height);} else {$newim = imagecreate($newwidth, $newheight);imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $pic_width, $pic_height);}imagejpeg($newim, $dest);imagedestroy($newim);}
}/*** 图像裁剪* @param $title string 原图路径* @param $content string 需要裁剪的宽* @param $encode string 需要裁剪的高*/
function imagecropper($source_path, $target_width, $target_height)
{$source_info = getimagesize($source_path);$source_width = $source_info[0];$source_height = $source_info[1];$source_mime = $source_info['mime'];$source_ratio = $source_height / $source_width;$target_ratio = $target_height / $target_width;// 源图过高if ($source_ratio > $target_ratio) {$cropped_width = $source_width;$cropped_height = $source_width * $target_ratio;$source_x = 0;$source_y = ($source_height - $cropped_height) / 2;} // 源图过宽elseif ($source_ratio < $target_ratio) {$cropped_width = $source_height / $target_ratio;$cropped_height = $source_height;$source_x = ($source_width - $cropped_width) / 2;$source_y = 0;} // 源图适中else {$cropped_width = $source_width;$cropped_height = $source_height;$source_x = 0;$source_y = 0;}switch ($source_mime) {case 'image/gif':$source_image = imagecreatefromgif($source_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, $cropped_height);// 裁剪imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height);
// 缩放imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $target_width, $target_height, $cropped_width, $cropped_height);//保存图片到本地(两者选一)$new = imagepng($target_image, $source_path);imagedestroy($target_image);return true;
}uploads();
?>

比较长，大家可以借鉴一下，根据需求来使用

最后上个效果图

引用的两张图片

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