Entry

What is the mean of isset in this line: if(!isset($mainfile)) { include("mainfile.php"); }

Feb 28th, 2007 15:50
Articles Way, Reza A Tabibazar, magdy ahmed,

isset is used to see if a variable is declared. A variable can be
dynamically created during a page exacution, ie an http post or get
operation. The line here says if the variable $mainfile is not declared
include the file mainfile.php
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mggpillai.com/sections.php3?op=listarticles&secid=2
i hope that helps.
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