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Home Backend Development PHP Tutorial How to Fix Base64 to Image Conversion Errors Caused by Invalid Data?

How to Fix Base64 to Image Conversion Errors Caused by Invalid Data?

Dec 19, 2024 pm 08:36 PM

How to Fix Base64 to Image Conversion Errors Caused by Invalid Data?

Convert Base64 String to an Image File

When attempting to convert a Base64 string to an image file, errors can arise due to invalid image data. This error may occur when the Base64 string includes "data:image/png;base64," which can cause decoding issues.

To resolve this error, remove the "data:image/png;base64," portion before decoding the Base64 string. The following code snippet illustrates how to modify the decoding function:

function base64_to_jpeg($base64_string, $output_file) {
    // open the output file for writing
    $ifp = fopen( $output_file, 'wb' ); 

    // split the string on commas
    // $data[ 0 ] == "data:image/png;base64"
    // $data[ 1 ] == <actual base64 string>
    $data = explode( ',', $base64_string );

    // we could add validation here with ensuring count( $data ) > 1
    fwrite( $ifp, base64_decode( $data[ 1 ] ) );

    // clean up the file resource
    fclose( $ifp ); 

    return $output_file; 
}

By removing the unnecessary header, you ensure that the decoding process only operates on the actual base64-encoded image data. This corrected code will successfully convert the Base64 string to a valid image file.

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