SVG图片生成

    前一段时间，在做项目时，遇到了要进行图片格式转换的问题，而且是将png/jpg或其他常见格式的图片转换为svg图片，后来经过网上调查，以及对比jpg，png图片源码，发现了如下的转换方法，现在贴出来，希望对有需要的同学能有帮助，同时也做个备份，哈哈。

【php code】

$svg_head="                                                                                                             
                                                                                                                 
                                                                                                                                                        
                           ]>                                                                                                                                                     
                         
                                x=\"0px\" y=\"0px\" width=\"44px\" height=\"44px\" viewBox=\"0 0 44 44\" enable-background=\"new 0 0 44 44\" xml:space=\"preserve\">              
                                                                                                                                                                            
                                                                                                                                                                           
                                        $svg_footer = "\">                                                                                                                                                
                                                                                                                                                                          
                        ";                                                                                                                                                  
                $tmpfile = file_get_contents($tmpjpg);                                                                                                                            
                $content = base64_encode($tmpfile);                                                                                                                               
                $svgfile = $svg_head."\n".$content."\n$svg_footer";  

    最后，将$svgfile写入到以svg扩展名的文件中，这样，SVG图片就可以生成了。