Thanks and sorry about the confusion... true == 1 and false == 0.
To summarize this discussion:
1) Unset variables evaluate to the empty string:
<?php unset($a); if ($a == "") print "something\n"; ?>
outputs the string "something"
<?php unset($a); $b = ""; if ($a == $b) print "something\n"; ?>
outputs the string "something"
Note that $a == $b evaluates to true even though
$a is not set but $b is set.
2) In the condition of a conditional expression the only string that
evaluates to false is the empty string "". All other strings
evaluate to true. For example:
<?php if ("hello") print "something\n"; ?>
produces output but
<?php if ("") print "something else\n"; ?>
produces no output.
Please let me know if for some reason this is still not correct.
Thanks!
Neil
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