Question

I have a simple bit of code that outputs the stream from a google post request as a PNG. It’s for using google to create a QRcode. What I want to do though is save this as a PNG file on my server and I can’t seem to figure out how to go about it as I’m not so familiar with working with streams. Here’s the code:

<?php

    //This script will generate the slug ID and create a QRCode by requesting it from Google Chart API
    header('content-type: image/png');

    $url = 'https://chart.googleapis.com/chart?';
    $chs = 'chs=150x150';
    $cht = 'cht=qr';
    $chl = 'chl='.urlencode('Hello World!');

    $qstring = $url ."&". $chs ."&". $cht ."&". $chl;       

    // Send the request, and print out the returned bytes.
    $context = stream_context_create(
        array('http' => array(
            'method' => 'POST',
            'content' => $qstring
    )));
    fpassthru(fopen($url, 'r', false, $context));

?>

Answer 1

This is one way, based on your code and specified ‘save this as a PNG file on my server’:

<?php
$url = 'https://chart.googleapis.com/chart?';
$chs = 'chs=150x150';
$cht = 'cht=qr';
$chl = 'chl='.urlencode('Hello World!');

$qstring = $url ."&". $chs ."&". $cht ."&". $chl;       

$data = file_get_contents($qstring);

$f = fopen('file.png', 'w');
fwrite($f, $data);
fclose($f);

Add error checking etc. to taste.