PHP Data-URI to file

A quick look at the PHP manual yields the following:

If you want to save data that is derived from a Javascriptcanvas.toDataURL() function, you have to convert blanks into plusses.If you do not do that, the decoded data is corrupted:

$encodedData = str_replace(' ','+',$encodedData);$decodedData = base64_decode($encodedData);

The data URI you have in your example is not a valid PNG image. This will never work and is unrelated to the code, it's related to the data.

Does not apply but might be of interest:

file_put_contents($_POST['logoFilename'], file_get_contents($data));

The idea behind: PHP itself can read the contents of data URIs (data://) so you don't need to decode it on your own.

Note that the official data URI scheme (ref: The "data" URL scheme RFC 2397) does not include a double slash ("//") after the colon (":"). PHP supports with or without the two slashes.

 # RFC 2397 conform $binary = file_get_contents($uri); # with two slashes $uriPhp = 'data://' . substr($uri, 5); $binary = file_get_contents($uriPhp);

The all code that works :

$imgData = str_replace(' ','+',$_POST['image']);$imgData =  substr($imgData,strpos($imgData,",")+1);$imgData = base64_decode($imgData);// Path where the image is going to be saved$filePath = $_SERVER['DOCUMENT_ROOT']. '/ima/temp2.png';// Write $imgData into the image file$file = fopen($filePath, 'w');fwrite($file, $imgData);fclose($file);