PHP生成推广海报的方法分享

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(),$filename=""){
//如果要看报什么错，可以先注释调这个header
if(empty($filename)) header("content-type: image/png");
$imageDefault = array(
'left'=>0,'top'=>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);
imagefill($imageRes,$color);
// imageColorTransparent($imageRes,$color); //颜色透明
imagecopyresampled($imageRes,$background,imagesx($background),imagesy($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,$color);
//关键函数，参数（目标资源，源，目标资源的开始坐标x,y,源资源的开始坐标x,目标资源的宽高w,h,源资源的宽高w,h）
imagecopyresampled($canvas,$res,$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'],$val['opacity']);//左，上，右，下，宽度，高度，透明度
}
}
//处理文字
if(!empty($config['text'])){
foreach ($config['text'] as $key => $val) {
$val = array_merge($textDefault,$val);
list($R,$G,$B) = explode(',',$val['fontColor']);
$fontColor = imagecolorallocate($imageRes,$R,$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'],$val['angle'],$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);
}
}

imagecopyresampled() 将一幅图像(源图象)中的一块正方形区域拷贝到另一个图像中
*/
imagecopyresampled($QR,$logo,$from_width,$logo_qr_width,$logo_qr_height,$logo_width,$logo_height);
}
//输出图片
imagepng($QR,'qrcode.png');
imagedestroy($QR);
imagedestroy($logo);
return '<img src="qrcode.png" alt="使用微信扫描支付">';
}
//调用查看结果
echo scerweima1('https://www.baidu.com');

array( array( 'text'=>'昵称','left'=>182,'top'=>105,'fontPath'=>'qrcode/simhei.ttf',//字体文件 'fontSize'=>18,0',) ),'image'=>array( array( 'url'=>'qrcode/qrcode.png',//图片资源路径 'left'=>130,'top'=>-140,'stream'=>0,//图片资源是否是字符串图像流 'right'=>0,'width'=>150,'height'=>150,'opacity'=>100 ),array( 'url'=>'https://wx.qlogo.cn/mmopen/vi_32/DYAIOgq83eofD96opK97RXwM179G9IJytIgqXod8jH9icFf6Cia6sJ0fxeILLMLf0dVviaF3SnibxtrFaVO3c8Ria2w/0','left'=>120,'top'=>70,'width'=>55,'height'=>55,),'background'=>'qrcode/bjim.jpg',); $filename = 'qrcode/'.time().'.jpg'; //echo createPoster($config,$filename); echo createPoster($config);