[SOLVED] What is the difference...?

[maxudaskin]

What is the difference between ___?

 

• echo & print
  
• while & do
  
• die & exit
  
• define(blah,blah) & $blah = blah
  

 

And any others that may be confusing...

[ratcateme]

echo read this http://www.faqts.com/knowledge_base/view.phtml/aid/1/fid/40

do checks the expression at the end instead of the begin

not much between exit and die

i don't really use define but it assigns case insensitively check this http://nz2.php.net/define

 

Scott.

 

 

[p2grace]

define is a global variable.  You can call it within classes, functions, and pages without having to global it.

[trq]

All these questions are answered in the manual if you look, but here we go....

 

• The only difference between print and echo is that echo excepts multiple arguments.
  
• While evaluates the expression prior to executing the first time, do does not.
  
• Nothing
  
• The define function creates constants, not variables.

[maxudaskin]

If a constant is retrieved the same way as a variable what is the difference between the two?

[ratcateme]

the fact you can get them from a function without having to call it specially i think.

[trq]

As the name implies, they are constant not variable. Meaning they cannot be changed. And yes, they are also avaliable globally.

[maxudaskin]

Can you call

<?php define("GREETING","Hello you! How are you today?");
echo $GREETING;
?>

[trq]

That would be....

 

<?php

define("GREETING","Hello you! How are you today?");
echo GREETING;

?>