> PHP Notice: Undefined variable: action in
> C:\Apache\htdocs\easyletter2\easyletter.php on line 73
>
> Why do I get an undefined variable error for $action, $pw, $disp,
> $found when they do not have to be declared in the script?
> if ($action=="sign"){
At this point, $action was not set. At some point in your
script you may want to check if $action exists at all and
if not, assign it to boolean false (just one of a million
things you can do). Like, on top of the script:
// Initialize various variables if they are empty
$vars_to_init = array('action','pw','disp','found');
foreach ($vars_to_init as $var) {
if (empty(${$var})) {
${$var} = false;
}
}
That'll check them, and set empty vars to false. Seems
kinda weird, it is ;) Undefined variables are level
E_NOTICE errors in PHP. Some people find these a bit
annoying and turn them off, most prefer to eliminate
them. When you said variables don't have to be
declared in PHP, you are right in that they are just
E_NOTICE level errors, not Fatal E_ERROR. By default,
error_reporting levels do not show E_NOTICE but good
little programmers attend to them.
A quick and dirty way to magically get rid of them is
to turn down error_reporting in php.ini or at runtime.
error_reporting is both a PHP directive and a PHP
function.
There is also '@' available to suppress an error, it
works on both functions and variables. See:
http://www.php.net/manual/language.operators.errorcontrol.php
What is done of course depends on the situation and
the person.
Regards,
Philip Olson
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