save your heart for someone wh variable operation function unset

Meaning: Used to destroy one or more specified variables;

Format: unset(variable name 1 [, variable name 2]);

Usage: When the user does not want to use a certain variable, or Want to completely delete a variable;

Note: The destruction behavior of unset() in the function is related to the type of the variable. Using unset (variable name) locally only causes the local variable to be destroyed. If you want to destroy the global variable locally, For variables, use unset($GLOBALS["Name of the variable"])

Manual: PHP Manual-->Function Reference-->Related extensions of variables and types-->variable handling function -->unset

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