Has php a "param" if a var not defined?

[griffith]

In cold fusion we set <cfparam name="var" default="0"> so that it won't fail if the var isn't defined. Has php something similar to this??

[Anon]

No need to define variable in PHP...

[mkarabulut]

You can use
if ( isset($variable_name))
{
//defined

}
else
{
//not defined
}

[Anon]

In function definitions default values are specified:

function dostuff($param='some default')
{
....
}