Colleagues.
I have a web-based system developed in PHP, but I would like a message to appear like Outlook and Facebook when the connection goes down. In PHP I did the following:
if(!$sock = fsockopen('www.google.com.br',80,$num,$error,5)){
// Aqui apareceria a mensagem em bootstrap.
}
But it is not working. When the connection drops, that browser error page appears.
The only way to do what you want is on the client side and not on the server side.
Here's a Javascript example to detect whether the page is online or not at the time it is loaded:
if(navigator.onLine) { // true|false
// ...
}
This other example runs the function if the Browser goes offline / online
//função a ser executada quando ficar online
function statusOnline() {
//o seu código...
}
//função a ser executada quando ficar offline
function statusOffline() {
//o seu código...
}
window.addEventListener('online', statusOnline);
window.addEventListener('offline', statusOffline);
Another solution might be to use a library like offline.js