PHP实现图片合并的示例详解（php图片合成视频）学到了

目录业务需求最终效果准备工作完整过程常见的问题

//微信小程序 小程序码
public static function getWeChatSmallProgramCode($scene)
{
$AccessToken=self::getAccessToken();
$url=”https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=” . $AccessToken;
$postData=[
‘scene’=> $scene,
‘page’=> ‘pages/index/index’,
‘width’=>930
];
$postData=json_encode($postData);
$contentData=self::sendPost($url, $postData);
return $contentData; //如果图片大小符合这开启base64位图片地址也可以完成图片的合并合文字的合并
// return self::base64UrlCode($contentData, ‘image/png’);
}

protected static function sendPost($url, $post_data)
{
$options=array(
‘http’=> array(
‘method’=> ‘POST’,
‘header’=> ‘Content-type:application/json’,
//header 需要设置为 JSON
‘content’=> $post_data,
‘timeout’=> 60
//超时时间
)
);
$context=stream_context_create($options);
return file_get_contents($url, false, $context);
}

//二进制转图片image/png
public static function base64UrlCode($contents, $mime)
{
$base64=base64_encode($contents);
return (‘data:’ . $mime . ‘;base64,’ . $base64);
}

public static function picZoom($img_path,$new_width,$new_height,$new_img_path)
{
//获取尺寸
list($width, $height, $img_type, $attr)=getimagesize($img_path);
$imageinfo=[
‘width’=> $width,
‘height’=> $height,
‘type’=> image_type_to_extension($img_type, false),
‘attr’=> $attr
];
$fun=”imagecreatefrom” . $imageinfo[‘type’];
$image=$fun($img_path);
//创建新的幕布
$image_thump=imagecreatetruecolor($new_width, $new_height);
//复制源文件
imagecopyresampled($image_thump, $image, 0, 0, 0, 0, $new_width, $new_height, $imageinfo[‘width’], $imageinfo[‘height’]);
imagedestroy($image);

$image=$image_thump;
$func=’image’ . $imageinfo[‘type’];
$func($image, $new_img_path);
}

public static function picMerge($dstPath, $srcPath, $dstX=0, $dstY=0, $srcX=0, $srcY=0, $pct=100, $filename=”)
{
//创建图片的实例
$dst=imagecreatefromstring(file_get_contents($dstPath));
$src=https://www.jb51.net/article/imagecreatefromstring(file_get_contents($srcPath));
//获取水印图片的宽高
list($src_w, $src_h)=getimagesize($srcPath);
//将水印图片复制到目标图片上，最后个参数50是设置透明度，这里实现半透明效果
// imagecopymerge($dst, $src, 80, 125, 0, 0, $src_w, $src_h, 100);
imagecopymerge($dst, $src, $dstX, $dstY, $srcX, $srcY, $src_w, $src_h, $pct);
//如果水印图片本身带透明色，则使用imagecopy方法
//imagecopy($dst, $src, 10, 10, 0, 0, $src_w, $src_h);
//输出图片
list($dst_w, $dst_h, $dst_type)=getimagesize($dstPath);
switch ($dst_type) {
case 1://GIF
if (!$filename) {
header(‘Content-Type: image/gif’);
imagegif($dst);
} else {
imagegif($dst, $filename);
}
break;
case 2://JPG
if (!$filename) {
header(‘Content-Type: image/jpeg’);
imagejpeg($dst);
} else {
imagejpeg($dst, $filename);
}
break;
case 3://PNG
if (!$filename) {
header(‘Content-Type: image/png’);
imagepng($dst);
} else {
imagepng($dst, $filename);
}
break;
default:
break;
}
imagedestroy($dst);
imagedestroy($src);
}

public static function addFontToPic($dstPath, $fontPath, $fontSize, $text, $dstY, $filename=”)
{
ob_end_clean();

//创建图片的实例
$dst=imagecreatefromstring(file_get_contents($dstPath));
//打上文字
$fontColor=imagecolorallocate($dst, 255, 255, 255);//字体颜色
$width=imagesx($dst);
$height=imagesy($dst);
$fontBox=imagettfbbox($fontSize, 0, $fontPath, $text);//文字水平居中实质
imagettftext($dst, $fontSize, 0, ceil(($width – $fontBox[2]) / 2), $dstY, $fontColor, $fontPath, $text);
//输出图片
list($dst_w, $dst_h, $dst_type)=getimagesize($dstPath);
switch ($dst_type) {
case 1://GIF
if (!$filename) {
header(‘Content-Type: image/gif’);
imagegif($dst);
} else {
imagegif($dst, $filename);
}
break;
case 2://JPG
if (!$filename) {
header(‘Content-Type: image/jpeg’);
imagejpeg($dst);
} else {
imagejpeg($dst, $filename);
}
break;
case 3://PNG
if (!$filename) {
header(‘Content-Type: image/png’);
imagepng($dst);
} else {
imagepng($dst, $filename);
}
break;
default:
break;
}
imagedestroy($dst);
return $filename;
}

public static function generateWeChatAppletImage($shop_id, $shop_name)
{
//1 生成小程序码
//2 合成小程序码到背景图片
$sceneStr=’?shop_id=’ . $shop_id;
$weChatAppImgBaseData=WxTools::getWeChatSmallProgramCode($sceneStr);
$weChatAppImgPath=’https://www.jb51.net/article/weChatAppImg/shop_code_’ . $shop_id . ‘.jpg’;
file_put_contents($weChatAppImgPath, $weChatAppImgBaseData);

//合并到背景图片中
$beiJinImgPath=’https://www.jb51.net/article/weChatAppImg/weChatBJ.jpg’;
$mergeImgFile=’https://www.jb51.net/article/weChatAppImg/shop_mini_program’ . $shop_id . ‘.jpg’;
GenerateCodeImg::picMerge($beiJinImgPath, $weChatAppImgPath, 408, 714, $srcX=0, $srcY=0, $pct=100, $mergeImgFile);

//3 合成文字
$fontPath=’https://www.jb51.net/article/plus/fonts/SourceHanSansCN-Bold.ttf’;
$fontSize=40;
$dstY=640;
GenerateCodeImg::addFontToPic($mergeImgFile, $fontPath, $fontSize, $shop_name, $dstY, $mergeImgFile);

$weChatCodeImgUrL=\Yii::$app->request->hostInfo . ‘/weChatAppImg/shop_code_’ . $shop_id . ‘.jpg’;
$weChatAppImgUrl=\Yii::$app->request->hostInfo . ‘/weChatAppImg/shop_mini_program’ . $shop_id . ‘.jpg’;
return [
‘weChatCodeImgUrL’=> $weChatCodeImgUrL,
‘weChatAppImgUrl’=> $weChatAppImgUrl,
];
}

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