PHP base64图片转换上传

function base64_img($base64_img){

/* $base64_string = $base64_img;
$savename = uniqid().'.jpeg';

$save_path = $php_path . 'Uploads/';
$ymd = date("Ymd");
$save_path .= $ymd . "/";
$save_url .= $ymd . "/";
if (!file_exists($save_path)) {
    mkdir($save_path);

}
$savepath = $save_path . $savename;
$image = base64_to_img( $base64_string, $savepath );
return '/'.$image; */

$base64_string = $base64_img;
$base64_0=explode(',', $base64_string);
$base64_1=explode('/', $base64_0['0']);
$base64_2=explode(';', $base64_1['1']);
$s = base64_decode(str_replace(''.$base64_0['0'].',','',$base64_string));
$savename = uniqid().time().rand(10000,99999).'.'.$base64_2['0'];
$save_path = $php_path . 'Uploads/image/';
$ymd = date("Ymd");
$save_path .= $ymd . "/";
$save_url .= $ymd . "/";
if (!file_exists($save_path)) {

    mkdir($save_path);

}

$savepath = $save_path . $savename;

$image= file_put_contents($savepath, $s);
return '/'.$savepath;

}

function base64_to_img( $base64_string, $output_file ) {

$ifp = fopen( $output_file, "wb" ); 

fwrite( $ifp, base64_decode( $base64_string) ); 

fclose( $ifp ); 

return( $output_file ); 

}