How to convert svg to png format in php

php method to convert svg to png format: 1. Install the php imagick extension plug-in and use the built-in function in the plug-in to convert. 2. First convert the svg image into a canvas image; then convert the canvas image into a png format image.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

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);
$svg = &#39;<?xml version="1.0" encoding="UTF-8" standalone="no"?>&#39;.$svg;
$im->readImageBlob($svg);
// png settings
$im->setImageFormat("png24");
$srcImage = $im->getImageGeometry(); //获取源图片宽和高
$im->resizeImage($srcImage[&#39;width&#39;], $srcImage[&#39;height&#39;], imagick::FILTER_LANCZOS, 1, false);
$im->writeImage($upload_path.&#39;/&#39;.$topng_name.&#39;.png&#39;);
$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 = &#39;<rect width="100%" height="100%" fill="#ffffff"></rect>&#39; + 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

Recommended learning: "PHP Video Tutorial"

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