1. PrefaceWeb-side IM technology is not easy to implement due to limitations in browser design, and there are roughly 4 main web-end instant Messaging solutions: Traditional Ajax short polling, Comet technology, WebSocket Technology, SSE
1. PrefaceWeb-side IM technology is not easy to implement due to limitations in browser design, and there are roughly 4 main web-end instant Messaging solutions: Traditional Ajax short polling, Comet technology, WebSocket Technology, SSE
OverviewTraditional Web pages are browser to the server "query" data, but in many cases, the most effective way is the server to the browser "send" data. For example, whenever a new e-mail message is received, the server sends a "notification" to
HTML5 data push SSE principle and application development, html5sse
JavaScript expresses behavior and CSS expresses appearance. Note that HTML not only expresses structure (logical structure), but also expresses content (data itself). When data
The old program adds a new message reminder function. Currently, SSE can be used to push messages. In the backend PHP, a query statement is directly executed to check whether there are new messages, and if yes, the query statement is output. A
HTML5 supports Server-Sent Events-one-way message transmission data push (C # example ),
Simple Sequence Diagram for traditional WEB applications to communicate:
Currently, most Web apps have Ajax, which is like this:
HTML5 has a Server-Sent
A list of asynchronous programming resources in PHP.
Concepts
Asynchronous
asynchronous I/O-Wikipedia
Async PHP by Christopher Pitt/assertchris
Blocking
Blocking (computing)-Wikipedia
Concurrency
Concurrency
The PHP strtotime function resolves the date-time description of any English text to a UNIX timestamp [converts system time to UNIX timestamp]
First, get the Unix timestamp strtotime ("2009-1-22″" example) for the specified date as follows:
Echo
SOURCE Location: \ext\date\php_date.c
Copy Code code as follows:
/* {{{proto int strtotime (string time [, int now])
Convert string representation of date and time to a timestamp * *
Php_function (Strtotime)
{
Char *times, *initial_ts;
Val () has a lot of lethality for PHP security in general, to prevent needs to be banned from breaking the door.
It's wrong to say that using disable_functions to ban Eval is a lot on the web.
In fact, eval () cannot be banned with
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