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raspap-webgui/app/img/wifi-qr-code.php

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<?php
require_once '../../includes/config.php';
require_once '../../includes/defaults.php';
require_once '../../includes/functions.php';
function qr_encode($str)
{
return preg_replace('/(?<!\\\)([\":;,])/', '\\\\\1', $str);
}
$hostapd = parse_ini_file(RASPI_HOSTAPD_CONFIG, false, INI_SCANNER_RAW);
// assume wpa encryption and get the passphrase
$type = "WPA";
$password = isset($hostapd['wpa_psk']) ? $hostapd['wpa_psk'] : $hostapd['wpa_passphrase'];
// use wep if configured
$wep_default_key = intval($hostapd['wep_default_key']);
$wep_key = 'wep_key' . $wep_default_key;
if (array_key_exists($wep_key, $hostapd)) {
$type = "WEP";
$password = $hostapd[$wep_key];
}
// if password is still empty, assume nopass
if (empty($password)) {
$type = "nopass";
}
$ssid = $hostapd['ssid'];
$hidden = intval($hostapd['ignore_broadcast_ssid']) != 0 ? "H:true" : "";
$ssid = qr_encode($ssid);
$password = qr_encode($password);
$data = "WIFI:S:$ssid;T:$type;P:$password;$hidden;";
$command = "qrencode -t svg -m 0 -o - " . mb_escapeshellarg($data);
$svg = shell_exec($command);
$config_mtime = filemtime(RASPI_HOSTAPD_CONFIG);
$last_modified = gmdate('D, d M Y H:i:s ', $config_mtime) . 'GMT';
$etag = hash('sha256', $data);
$content_length = strlen($svg);
header("Content-Type: image/svg+xml");
header("Content-Length: $content_length");
header("Last-Modified: $last_modified");
header("ETag: \"$etag\"");
header("X-QR-Code-Content: $data");
echo shell_exec($command);