php method to convert svg to png: first convert svg to canvas through the "drawInlineSVG" method; then use the "base64_image_content" method to convert canvas into png.

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svg to png implementation

1.php imagick extension plug-in

a. Study the imagick plug-in method

$im = new Imagick($upload_path . $file_name); $svg = file_get_contents($upload_path . $file_name); $svg = ''.$svg; $im->readImageBlob($svg); // png settings $im->setImageFormat("png24"); $srcImage = $im->getImageGeometry(); //获取源图片宽和高 $im->resizeImage($srcImage['width'], $srcImage['height'], imagick::FILTER_LANCZOS, 1, false); $im->writeImage($upload_path.'/'.$topng_name.'.png'); $im->clear(); $im->destroy();

b. Problems encountered

svg pictures can be successfully converted into png format pictures, but png pictures There are problems:

1) Line segments are missing;

2) Fonts are not displayed;

3) The style tag style in the svg file cannot be parsed;

2 .Abandon the imagick plug-in and change it to svg to canvas to png

a.svg to canvas

function drawInlineSVG($svg, callback) { var svg = $svg; var parser = new DOMParser(); var doc = parser.parseFromString(svg, "text/xml"); svg = doc.getElementsByTagName('svg'); svg = svg[0]; svg.innerHTML = '' + svg.innerHTML; var svgData = new XMLSerializer().serializeToString( svg ); var img = document.createElement( "img" ); img.setAttribute( "src", "data:image/svg+xml;base64," + btoa( unescape(encodeURIComponent(svgData)) ) ); img.onload = function () { var canvas = document.createElement( "canvas" ); canvas.width = img.width; canvas.height = img.height; var ctx = canvas.getContext( "2d" ); //取得画布的2d绘图上下文 ctx.drawImage( img, 0, 0 ); canvas.toDataURL( "image/png" ); var base64Src = canvas.toDataURL( "image/png" ); callback && callback(base64Src); // 调用回掉函数 }; return; }

b.canvas to png (base64Src converted to png)

/* base64格式编码转换为图片并保存对应文件夹 */ function base64_image_content($base64_image_content,$path, $file_name = ''){ //匹配出图片的格式 if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){ if(!file_exists($path)){ // 路径不存在 return false; } $new_file = $path . $file_name; if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){ return '/'.$new_file; }else{ return false; } }else{ return false; } }

c .Effect examples

1) svg format

2) png format

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