PHP turns images into base64

PHP support for Base64 is very good, there is a built-in Base64_encode and Base64_decode responsible for the image of the Base64 encoding and decoding.

On the encoding, as long as the picture stream is read, and then using Base64_encode to encode can be obtained.

/** * Get image Base64 encoding (URL not supported) * @date 2017-02-20 19:41:22 * * @param $img _file incoming local image address * * @return string*/functionImgToBase64 ($img _file) {    $img _base64= ' '; if(file_exists($img _file)) {        $app _img_file=$img _file;//Picture Path        $img _info=getimagesize($app _img_file);//get pictures of size, type, etc.//echo ' <pre> '. Print_r ($img _info, True). ' </pre><br> ';        $fp=fopen($app _img_file, "R");//whether the picture is readable permission        if($fp) {            $filesize=filesize($app _img_file); $content=fread($fp,$filesize); $file _content=Chunk_split(Base64_encode($content));//base64 Encoding            Switch($img _info[2]) {//Interpreting picture Types                 Case1:$img _type= "GIF";  Break;  Case2:$img _type= "JPG";  Break;  Case3:$img _type= "png";  Break; }            $img _base64= ' data:image/'.$img _type. '; Base64, '.$file _content;//base64 encoding of synthetic images        }        fclose($fp); }    return $img _base64;//returns the base64 of a picture}//method used by call$img _dir=dirname(__file__) . '/uploads/img/11213223.jpg ';$img _base64= ImgToBase64 ($img _dir);Echo' $img _base64. ' > ';//picture form ShowEcho' ;Echo $img _base64;//Output BASE64 encoding

And decoding a little bit of trouble, the reason is that the image encoded into a base64 string, the code will be added to these characters data:image/png;base64, originally used for base64 identification. But if you put it directly into PHP with the Base64_decode function decoding will cause the final saved picture file format corruption, and the solution is to first remove this string of characters:

$base 64_string Explode $base 64_string // intercept Data:image/png;base64, the comma-after character $data Base64_decode　　($base 64_string[1]); // use Base64_decode to decode the truncated character file_put_contents ($url$data// write file and save

Ext.: https://www.cnblogs.com/cloudshadow/p/php_img_to_base64.html

Https://www.cnblogs.com/byuc/p/7600451.html

PHP to convert pictures to base64