PHP Context Learning Series "Ten"

The context is used for all file system or data flow encapsulation protocols.

1. Socket context

The main tcp,http,ftp are these socket-based protocols.

Example of the newly added bindto parameter:

<? PHP $opt Array (    array(        ' bindto ' = > ' 192.168.1.1:8000 ',        ),    ); $context stream_context_create ($opt); Echo false $context );? >

2:http context

Args

Method (string) The remote server supports requests such as Get post.

The header (string) overrides the User-agent defined later.

User_agent (String)

Max_redirects (integer) defaults to a maximum of 20 redirects, set to 1 or 0 times without redirection.

The additional data to be sent by the context (string) behind the header, usually using a post or a put

Protocol_version (float) is 1.0 by default. Let's set him to 1.1. Then you can support chunked transfer decoding (chunked transfer encoding). Take a good look at this. Chunked Transmission decoding

A POST request instance:

<? PHP $postdata Http_build_query (    array(        ' var1 ' = ' post1 ',        ' var2 = ' post2 '    )); $opts = Array ( ' http '= =    array        (' method ' = ' post'        ,'header' = ') ' Context-type:application/x-www-form-urlencoded ',        ' content ' = $postdata        )); $content = Stream_context_create ($opts); file_get_contents (' www.examples.com/submit.php ', false, $content);

PHP Context Learning Series "Ten"