Difference between revisions of "Sessions"

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Remember this about variables<ref>http://www.w3schools.com/php/php_variables.asp</ref>:
In computer science, in particular networking, a session is a semi-permanent interactive information interchange, also known as a dialogue, a conversation or a meeting, between two or more communicating devices, or between a computer and user (see Login session). A session is set up or established at a certain point in time, and then torn down at some later point. An established communication session may involve more than one message in each direction. A session is typically, but not always, stateful, meaning that at least one of the communicating parts needs to save information about the session history in order to be able to communicate, as opposed to stateless communication, where the communication consists of independent requests with responses.
 
An established session is the basic requirement to perform a connection-oriented communication. A session also is the basic step to transmit in connectionless communication modes. However any unidirectional transmission does not define a session.<ref>https://en.wikipedia.org/wiki/Session_(computer_science)</ref>
# A variable starts with the $ sign, followed by the name of the variable
# A variable name must start with a letter or the underscore character
# A variable name cannot start with a number
# A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
# Variable names are case-sensitive ($age and $AGE are two different variables)


== See also ==  
== See also ==  

Revision as of 22:32, 8 February 2017

PHP Programming Language[1]

In computer science, in particular networking, a session is a semi-permanent interactive information interchange, also known as a dialogue, a conversation or a meeting, between two or more communicating devices, or between a computer and user (see Login session). A session is set up or established at a certain point in time, and then torn down at some later point. An established communication session may involve more than one message in each direction. A session is typically, but not always, stateful, meaning that at least one of the communicating parts needs to save information about the session history in order to be able to communicate, as opposed to stateless communication, where the communication consists of independent requests with responses. An established session is the basic requirement to perform a connection-oriented communication. A session also is the basic step to transmit in connectionless communication modes. However any unidirectional transmission does not define a session.[2]

See also[edit]

References[edit]