T.wei

mac@root Homebrew#brew install rae/dsniff/dsniff ==> Installing dsniff from rae/dsniff ==> Installing dependencies for rae/dsniff/dsniff: libpcap ==> Installing rae/dsniff/dsniff dependency: libpcap ==> Downloading https://homebrew.bintray.com/bottles/libpcap-1.8.1.high_sierra.bottle.tar.gz Already downloaded: /var/root/Library/Caches/Homebrew/libpcap-1.8.1.high_sierra.bottle.tar.gz ==> Pouring libpcap-1.8.1.high_sierra.bottle.tar.gz ==>...

I want to add a loading box before the popup, how to detect the occurrence of the popup

when call qrencode_save,return 502 bad gateway

1

$qrcode_image = "/tmp/qrencode1.png"; $content = "hello world"; try{ $resource = qrencode_create($content, 2, 2); ``` qrencode_save($resource, $qrcode_image); ``` }catch(Exception $e){ print_r($e->getMessage()); } i don't know why