How to read byte array in php

Question

I am sending a mp3 file using the following code to a server.In server I want a php code to receive this byte array of mp3 and convert it into file and store it there.

try {
    final ByteArrayOutputStream out = new ByteArrayOutputStream();
    File file = new File(Environment.getExternalStorageDirectory()+ "/my.mp3");
    final InputStream in = new FileInputStream(file);
    final byte[] buf = new byte[2048];
    int n;
    while ((n = in.read(buf)) >= 0) {
        out.write(buf, 0, n);
    }
    final byte[] data = out.toByteArray();
    String urlString = "http://10.0.0.56/upload.php";
    HttpPost postRequest = new HttpPost(urlString);
    postRequest.setEntity(new ByteArrayEntity(data));
    HttpClient client = new DefaultHttpClient();
    HttpResponse response = client.execute(postRequest);
    HttpEntity entity = response.getEntity();
    InputStream ins = entity.getContent();
    BufferedReader br = new BufferedReader(new InputStreamReader(ins));
    String temp_str;
    StringBuilder sb = new StringBuilder();
    while((temp_str = br.readLine()) != null) {
        sb.append(temp_str);
    }
    Log.e("response", sb.toString());
} catch (Exception e) {
    // handle exception here
    Log.e(e.getClass().getName(), e.getMessage());
    return "exception";
}

Any one know how to read the mp3 file using php.

You should be able to find data in $_POST variable. If you were able to write this code in Java, opening binary file in php, writing and then saving it shouldnt be problem for you. — Buksy
– Buksy, Commented Mar 15, 2013 at 10:32
@Buksy i m not comfortable with php.i am a java and android guy.i searched a lot but didn't find any post which is directly reading audio file.I got post to read image but not audio file.y. — Android Killer
– Android Killer, Commented Mar 15, 2013 at 10:33

smassey · Accepted Answer · 2013-03-15 10:53:00Z

5

Your upload.php could look something like this:

$mp3_bin = file_get_contents('php://input');
file_put_contents( '/path/to/my/mp3', $mp3_bin );

Short and sweet ;)

Edit:

# A bit of golfing gives a one liner:
file_put_contents('/path/to/my.mp3', file_get_contents('php://input'));

answered Mar 15, 2013 at 10:53

smassey

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6 Comments

smassey Over a year ago

So.. basically the file_get_contents() is reading the raw HTTP POST data and the file_put_contents() is saving the raw content to a file.

Android Killer Over a year ago

<?php $mp3_bin = file_get_contents('php://input'); file_put_contents( '/home/m/m/my.mp3', $mp3_bin ); %>

smassey Over a year ago

Because you gave file_put_contents what looks like a directory.. give it a file instead ;)

Android Killer Over a year ago

see my edited comment.Now i made the file but still not working :(.plz do something.boss is dancing on my head.

smassey Over a year ago

The only reason this wouldn't work is file permissions.. Does your httpd user have write persmission to the directory and file where you're trying to write ? Otherwise (this usually is the case) attempt writing to /tmp/my.mp3 as /tmp is usually open for any user.

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