How to convert svg to png in php

藏色散人

Release： 2023-03-04 22:36:02

Original

3329 people have browsed it

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.

How to convert svg to png in php

Recommended: "PHP Video Tutorial"

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();

Copy after login

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(&#39;svg&#39;);
    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;
}

Copy after login

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 = &#39;&#39;){
    //匹配出图片的格式
    if (preg_match(&#39;/^(data:\s*image\/(\w+);base64,)/&#39;, $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], &#39;&#39;, $base64_image_content)))){
            return &#39;/&#39;.$new_file;
        }else{
            return false;
        }
    }else{
        return false;
    }
}

Copy after login

c .Effect examples

1) svg format

2) png format

The above is the detailed content of How to convert svg to png in php. For more information, please follow other related articles on the PHP Chinese website!