php-with-libusb-example.php

<?php

$ffi = FFI::cdef(file_get_contents(__DIR__ . '/libusb.h'), '/usr/local/Cellar/libusb/1.0.24/lib/libusb-1.0.0.dylib');

$dh = $ffi->new('libusb_device_handle *');
$path = $ffi->new('uint8_t[8]');
$sdata = $ffi->new('uint8_t[255]');

$init = $ffi->libusb_init(null);

$devices = $ffi->new('libusb_device **');
$size = $ffi->libusb_get_device_list(null, FFI::addr($devices));

for ($x = 0; $x < $size; $x++) {
    $device = $devices[$x];
    $desc = $ffi->new('libusb_device_descriptor');
    $r = $ffi->libusb_get_device_descriptor($device, FFI::addr($desc));

    $err = $ffi->libusb_open($device, FFI::addr($dh));

    if ($err < 0) {
        continue;
    }

    try {
        $r = $ffi->libusb_get_string_descriptor_ascii($dh, $desc->iManufacturer, $sdata, FFI::sizeof($sdata));

        $m = [];
        for ($i = 0; $i < 255; $i++) {
            $m[] = chr($sdata[$i]);
        }

        $m = trim(implode($m));

        $r = $ffi->libusb_get_string_descriptor_ascii($dh, $desc->iProduct, $sdata, FFI::sizeof($sdata));

        $p = [];
        for ($i = 0; $i < 255; $i++) {
            $p[] = chr($sdata[$i]);
        }

        $p = trim(implode($p));


        $r = $ffi->libusb_get_string_descriptor_ascii($dh, $desc->iSerialNumber, $sdata, FFI::sizeof($sdata));


        $s = [];
        for ($i = 0; $i < 255; $i++) {
            $s[] = chr($sdata[$i]);
        }

        $s = trim(implode($s));


        printf(
            "%04x/%04x (bus %d, device %d), Manufacturer: %s, Product: %s, SN: %s\n",
            $desc->idVendor,
            $desc->idProduct,
            $ffi->libusb_get_bus_number($device),
            $ffi->libusb_get_device_address($device),
            $m,
            $p,
            $s
        );
    } finally {
        $ffi->libusb_release_interface($dh, 0);
        $ffi->libusb_close($dh);
    }
}

$ffi->libusb_free_device_list($devices, 1);
$ffi->libusb_exit(null);