phponlinetutorial

$_file in php examples By using this super global variable we can get the information of uploading files. It is 2 dimensional array variables     providing 5 elements. It is used to hold the information of uploading file. Every element 1 st dimensional is the name of the upload control.   By using default every upload file will load in to the temporary location with another name when user click on the submit button we have move that file temporary location to permanent location. When the file uploaded in to the server in server $_file variable will create with 5 elements.

$_cookie in php examples By using this super global variable we can access the value of a cookie.

Isset in php examples By using this function we can check weather the variable is set with value or not.  

Query sting in php examples Query string is the small amount of data on the url address followed by? Mark   along with the input control values if you want send some extra information from one page to another page we are using query string. Query string is the combination of name and value.

$_request   in php examples By using this super global variable we can get the values of both get and post methods and also query string and cookie values.

$_post in php examples  By using this super global variable we can get the posted values of post method.