PHP：如何在使用base64解码后正确使用pathinfo

Question

I'm getting an error Array to string conversion at pathinfo after using base64 decode image. Error occurs when trying to put my files into diretory. I need to maintain the name of the image.

BTW my image files came from js DOM

var formG = new FormData();
for(var i=0; i<imageTrust.length;i++){
    formG.append('file_multiImage[]', imageTrust[i]);
}


if(isset($_POST['file_multiImage'])){
    $multi_image =  $_POST['file_multiImage'];
    foreach ($multi_image as $key => $value) {
        $staticName = $event_id.'conNo'.$finalContestantNum;
        $data = str_replace('data:image/jpeg;base64,', '', $value);
        $data = str_replace(' ', '+', $data);
        $data = base64_decode($data);
        $file = pathinfo( $staticName . PATHINFO_EXTENSION); //Error occurs here
        file_put_contents($theDir.'/'. $file, $data);

    }
}

The array result

Array(
       [0] => data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQA 
       [1] => data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAlgCWAAD
       [2] => data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAAQABAAD/7QC
)
//I did not just continue strings are too long

Answer 1

There is syntax issue that the parser wouldn't have detected.

$file = pathinfo( $staticName . PATHINFO_EXTENSION);

change to

$file = pathinfo( $staticName , PATHINFO_EXTENSION);

however, your next usage of $file seems invalid, creating a malformed filename for the file_put_contents() call. By specifying PATHINFO_EXTENSION you are picking just the extension from the filename, which doesn't appear to exist.