php获取base64编码的图片

/**
 * 获取图片base64编码
 * @param $image_file   图片地址
 * @return string base64编码
 */
function get_image_base64($image_file) {
    $imginfo = getimagesize($image_file);
    $base64_image_content = "data:{$imginfo['mime']};base64,".chunk_split(base64_encode(file_get_contents($image_file)));
    return $base64_image_content;
}