base64_encode 字符串的 php 大小 - 文件

Question

我想知道如何知道 base64_encoded 字符串的文件大小？例如:

$data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'
       . 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'
       . 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'
       . '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg==';
$data = base64_decode($data);

谢谢

Answer 1

strlen(base64_decode($encoded_data));

根据粗略的经验，base64 编码会使原始数据的大小增加约 33%