Differences between $_get ($HTTP _get_vars) and $_post ($HTTP _post_vars)

$HTTP _get_vars and $_get $HTTP _post_vars and $_post

$HTTP _post_vars can be used in versions 3.0 and below, $HTTP _post_vars is not an automatic global variable

$_post can only be used in versions 4.0 and above

For your code application can be more extensive, please write $http_post_vars

HTTP POST Variable: $_post
Note: Used in PHP 4.1.0 and later versions. Previous versions, using the $HTTP _post_vars.

An array of variables that are passed through the HTTP POST method. is an automatic global variable.

This is a "superglobal", or can be described as an automatic global variable. This simply means that it works in all scripts. You do not need to use the global $_post in a function or method; To access it, just as with $HTTP _post_vars.

$HTTP _post_vars contains the same information, but not an automatic global variable. (Note: Http_post_vars and $_post are different variables, and PHP handles them in different ways.) )

in version php5.x, the default PHP setting is to disallow the use of Http_post_vars variables, so that some programs that were originally run in version php4.x will appear notice:undefined variable:http_post_vars Such a mistake, only need to modify the php.ini file in the Register_long_arrays, the default is off, change it to on on it!

HTTP POST Variable: $_post
Note: Used in PHP 4.1.0 and later versions. Previous versions, using the $HTTP _post_vars. Of course, the general is PHP5 now, generally do not use this kind of writing
If you want to be compatible with PHP4, refer to Discuz source code

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HTTP GET Variable: $_get
Note: used in PHP 4.1.0 and later versions. Previous versions, using   $HTTP _get_vars.  
An array of variables passed by the HTTP GET method. is an automatic global variable.  
This is a "superglobal", or it can be described as an automatic global variable. This simply means that it works in all scripts. You do not need to use global $_get in a function or method; To access it, just as with $HTTP _get_vars.  
$HTTP _get_vars contains the same information, but not an automatic global variable (note: $HTTP _get_vars and $_get are different variables, PHP handles them differently).  
If the register_globals directive is set, these variables are also available in all scripts, that is, the $_get and $HTTP _get_vars arrays are separated. For related information, please refer to the section on security using Register Globals. These individual global variables are not automatic global variables. &NBSP



HTTP POST variable: $_post
Note: used in PHP 4.1.0 and later versions. Previous versions, using   $HTTP _post_vars.  
An array of variables passed by the HTTP POST method. is an automatic global variable.  
This is a "superglobal", or it can be described as an automatic global variable. This simply means that it works in all scripts. You do not need to use global $_post in a function or method; To access it, just as with $HTTP _post_vars.  
$HTTP _post_vars contains the same information, but not an automatic global variable (note: $HTTP _post_vars and $_post are different variables, PHP handles them differently).  
If the register_globals directive is set, these variables are also available in all scripts, that is, the $_post and $HTTP _post_vars arrays are separated. For related information, please refer to the section on security using Register Globals. These individual global variables are not automatic global variables

Practical application: When the form is very large, it is possible to pass the value in the form of an array, and then cooperate with some classes to manipulate it.

viewing situation: Print_r ($_post);

Differences between $_get ($HTTP _get_vars) and $_post ($HTTP _post_vars)