php 圖片與base64互轉

 

header('Content-type:text/html;charset=utf-8');
//讀取圖片文件，轉換成base64編碼格式
$image_file = '1.png';
$image_info = getimagesize($image_file);

// $base64_image_content = "data:{$image_info[‘mime‘]};base64," . chunk_split(base64_encode(file_get_contents($image_file)));
$base64_image_content = "data:{$image_info['mime']};base64," . base64_encode(file_get_contents($image_file));


// 保存base64字符串爲圖片
// 匹配出圖片的格式
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){
    var_dump($result);
    $type = $result[2];
    $new_file = "./test.{$type}";
    if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){
        echo '<img src='.$new_file.'>';
    }

}

注：preg_match 若是匹配成功 $result

array(3) {
  [0]=>
  string(22) "data:image/png;base64,"
  [1]=>
  string(22) "data:image/png;base64,"
  [2]=>
  string(3) "png"
}