When I tried to run this, PHP treated the word -include- as a control
structure rather than an index name. Understandable. So, I put it in single
quotes ('include') to see what would happen and it works fine. But I don't
understand why!
What is the difference between $content_row [include] and
$content_row['include']? I have been unable to resolve this question in the
php manual, I need enlightenment.
Without quotes it could be constant or defined variable:
define('variable', 'blah blah blah');
so then I can just use:
<?php
define('variable', 'blah blah blah');
echo variable;
?>
will print out:
blah blah blah
So in your case, it's checking for a defined variable called 'include'
which doesn't exist (and prints out a warning/notice).
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