V

Index

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validation, HTML form input
values
     array elements
     dereferencing return values
     passing by
     true/false
var_dump( ) function
variable scope, functions
variable variables
variables
     appending
     assigning
     case-sensitivity
    global
         superglobals
     heredoc
     invalid characters
     isset( ) function
     register_globals and
     scope
     substitution
     this (OOP)
     types
     variable variables
version_compare( ) function
virtual( ) function