生成海報 · php常用實例

```php <?php /** * 生成宣傳海報 * @param array 參數,包括圖片和文字 * @param string $filename 生成海報文件名,不傳此參數則不生成文件,直接輸出圖片 * @return [type] [description] */ $config = array( 'image'=>array( array( 'url'=>'img_VRG.png', //二維碼資源 'stream'=>0, 'left'=>600, 'top'=>200, 'right'=>0, 'bottom'=>0, 'width'=>300, 'height'=>300, 'opacity'=>100 ), array( 'url'=>'img_ewm.png', //二維碼資源 'stream'=>0, 'left'=>1100, 'top'=>-216, 'right'=>0, 'bottom'=>0, 'width'=>300, 'height'=>300, 'opacity'=>100 ), ), 'text'=>array( array( 'text'=>'昵稱', 'left'=>182, 'top'=>105, 'fontPath'=>'qrcode/simhei.ttf', //字體文件 'fontSize'=>18, //字號 'fontColor'=>'255,0,0', //字體顏色 'angle'=>0, ) ), 'background'=>'img_bg_hbhb.png' //背景圖 ); $filename = 'bg/'.time().'.jpg'; //echo createPoster($config,$filename); echo createPoster($config); function createPoster($config=array(),$filename=""){ //如果要看報什么錯，可以先注釋調這個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, 'top'=>0, 'fontSize'=>32, //字號 'fontColor'=>'255,255,255', //字體顏色 'angle'=>0, ); $background = $config['background'];//海報最底層得背景 //背景方法 $backgroundInfo = getimagesize($background); $backgroundFun = 'imagecreatefrom'.image_type_to_extension($backgroundInfo[2], false); $background = $backgroundFun($background); $backgroundWidth = imagesx($background); //背景寬度 $backgroundHeight = imagesy($background); //背景高度 $imageRes = imageCreatetruecolor($backgroundWidth,$backgroundHeight); $color = imagecolorallocate($imageRes, 0, 0, 0); imagefill($imageRes, 0, 0, $color); // imageColorTransparent($imageRes, $color); //顏色透明 imagecopyresampled($imageRes,$background,0,0,0,0,imagesx($background),imagesy($background),imagesx($background),imagesy($background)); //處理了圖片 if(!empty($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']){ //如果傳的是字符串圖像流 $info = getimagesizefromstring($val['url']); $function = 'imagecreatefromstring'; } $res = $function($val['url']); $resWidth = $info[0]; $resHeight = $info[1]; $color = imagecolorallocate($imageRes,142, 165, 209); //建立畫板，縮放圖片至指定尺寸 $canvas=imagecreatetruecolor($val['width'], $val['height']); imagefill($canvas, 0, 0, $color); //關鍵函數，參數（目標資源，源，目標資源的開始坐標x,y, 源資源的開始坐標x,y,目標資源的寬高w,h,源資源的寬高w,h） imagecopyresampled($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']; //放置圖像 imagecopymerge($imageRes,$canvas, $val['left'],$val['top'],$val['right'],$val['bottom'],$val['width'],$val['height'],$val['opacity']);//左，上，右，下，寬度，高度，透明度 } } //處理文字 if(!empty($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']); } } //生成圖片 if(!empty($filename)){ $res = imagejpeg ($imageRes,$filename,90); //保存到本地 imagedestroy($imageRes); if(!$res) return false; return $filename; }else{ imagejpeg ($imageRes); //在瀏覽器上顯示 imagedestroy($imageRes); } } ```