[snip]
<?php
if (isset($variable))
{
if ($variable < $constant)
{
Execute this code if $variable is less than $constant
}
elseif ($variable > $constant)
{
Execute this code if $variable is more than $constant
}
elseif ($variable == $constant)
{
Execute this code if $variable and $constant are equal
}
}
else
{
Execute this code if $variable is not set
}
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