How to Determine Image Type from Base64 Strings in PHP?

Revealing Image Types from Base64 Strings in PHP

Navigating the world of encoded images can be a perplexing endeavor. When faced with only a base64 representation of an image, determining its original format can seem like an elusive quest. However, the PHP arsenal provides a crucial tool to uncover this elusive information: FileInfo.

FileInfo empowers you to unveil the underlying type of an image concealed within a base64 string. Here's how to harness its power:

<code class="php">$encoded_string = "....";
$imgdata = base64_decode($encoded_string);

$f = finfo_open();

$mime_type = finfo_buffer($f, $imgdata, FILEINFO_MIME_TYPE);</code>

With a swift call to finfo_buffer, you can retrieve the MIME type associated with the decoded image data. This MIME type serves as a blueprint, guiding you towards the image's original format.

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