initializing variables

[xploita]

how do i initialize each variable type in php?

i mean..do i initialize all of them to NULL ?

 

thx

[The Little Guy]

you don't need to initialize variables in PHP

[taith]

you dont have to initialize variables in php...

 

$var='test';

$var=1;

$var=true;

 

all of which work fine 

[xploita]

i know that i don't HAVE to,but it's better for security concerns that i do so.

so !

[The Little Guy]

NULL, TRUE/FALSE, ''

 

Those will all work fine ('' <- is an empty string)

[xploita]

so,u mean i'll be using NULL for all variable types?

or true/false for boolean

'' for strings

 

another thing,which is better.to use isset or just if($varname) to check if the variable has a value ?

 

regards

[The Little Guy]

I would use isset/empty, unless it is a boolean then you could use if($varname), and for the NULL var, your could do if(is_null($varname))

 

here are some good ways to return true/false values:

 

isset()

is_bool()

is_numeric()

is_float()

is_int()

is_string()

is_object()

is_array()

[xploita]

that's for checking if the variables were initialized or not.

 

still u didn't confirm about initializing them(in the begining of the script)

correct me if i'm wrong.

 

$string ='';

$boolean = true/false;

$array=array();

$int/$double=NULL;

 

what about objects?

 

regards