function to read global var?

@mityaDec 13.2004

I’m sure this is dead easy, but how can I call a script-wide var from within a function? Is it something you do when defining the var, or is it a method of calling from within the function?

i.e.

$var = “poo”;
function test() {
echo $var; //outputs ‘poo’
}

Thanks in advance.

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PHP

@scragarDec 13.2004 — #I don't understand the question.

[code=php]$var = "poo";
 function test() {
 echo $var; //outputs 'poo'
 };[/code]

works fine, I asume you mean how to get this to work:

[code=php]function foo() {
 $var = "test";
 };
 foo();
 echo $var; // calls an error, $var is undefined.[/code]

in this example we just set $var to be global.

[code=php]function foo() {
 global $var;
 $var = "test";
 };
 foo();
 echo $var; // no more errors, $var is now a global variable.[/code]

@NogDogDec 13.2004 — #I believe it's:

[code=php]
 function test() {
 global $var;
 echo $var; //outputs 'poo'
 }
 
 $var = "poo";
 test();
 [/code]

However, it's usually better for clarity and ease of maintenance to forego globals and instead make it a function parameter:

[code=php]
 function test($myVar) {
 echo $myVar;
 }
 
 $var = "poo";
 test($var); //outputs 'poo'
 [/code]

@mityaauthorDec 13.2004 — #Yeah I'm trying to avoid feeding every var to the function, it's messy. In javascript, inside functions you can call vars specified outside the function in a totally different area of the script.

So if I specify $var at the top of my script, and then want a function be able to read it without it being fed to it, that's what I'm after.

Thanks for the help guys.

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