PHP Curiosity

I'm just wondering if anyone knows the explanation for this: 
I'm making a simple PHP/MySql admin app so the lady can add or delete items on her catalog page. 

When I use: 
if ( $pwd != 'test' ) { 
echo "<h2>wrong Password</h2>\n"; 
exit; 
}    
The echo "wrong Password\n"; exit; would occur regardless of what was in the form field. 
I changed the variable from "$pwd" to "$pass" and it worked as expected.  

I had the variable "$itemnum" further down in the script. The PHP verification page displayed it but 
the MySql column came up empty. I changed that to "$number" and it went into the database as expected. 

(On both, I copy/pasted the variables from the HTML form to the PHP script so I know they were the same.)  

Is there a reasonable explanation for this or does PHP get to choose the variables it likes?  

Thanks, 
Buddy



 

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