_FILE_ and _LINE_ question 1

[Thadeus]

I am an extreme newbie at PHP and walking my walk through an e-book... On one example/lesson they have us request the _FILE_ variable contents to be 'echoed'. Additional lines request the PHP_VERSION and PHP_OS values as well.

Here's the question: Why do the version and OS values pop, but the word _FILE_ appears instead of the File name? Since this is such a simple script I can see that the syntax is the same across each line of code... simply:

<?
echo &quot;<br>here is my file &quot;._FILE_;
echo &quot;<br>here is the OS &quot;.PHP_OS;
//etc...
?>

OUTPUT is similar to:

here is my file _FILE_
here is the OS PHP4.3.3


Same problem with _LINE_ variable
Thanks,
Thadeus

 

[sleipnir214]

I think you'll find that the two constants are not

"_FILE_"   and "_LINE_",

but rather

"__FILE__" and "__LINE__"

(two underscores before and after)


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[Thadeus]

Thank you, I'll play with that this evening. Funny thing is I believe I even copy and pasted from the e-book trying to make this work.

That would make the second code typo I've run into in this e-book... I'll have to keep my eyes open.

Thanks again,
Thadeus

 

[sleipnir214]

Take a look in the PHP online manual:

http://us4.php.net/manual/en/language.constants.predefined.php

http://us4.php.net/manual/en/reserved.constants.core.php

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!!

 

[Thadeus]

I tested the other day with the double underscore and it worked perfectly. Thanks for your quick and accurate reply.

Thadeus