exists error

[tonyjob]

i get an error with this code:

if (exists param('name')){
}else{
}

it says that the condition in exists may be a hash, but it isnt. and this works:

$name=param('name');

so why doesnt the is statement?



~Tony

 

[stillflame]

'exists' checks to see if a hash's key exists.
Use 'defined' to check if something else exists.
[tt]
if (defined param('name')){
}else{
}
[/tt] "If you think you're too small to make a difference, try spending a night in a closed tent with a mosquito."

 

[tsdragon]

Unless null and/or 0 and/or '0' are valid values, it's easier just to say:

if ( $param{'name'} )

It the variable has any value other than null, zero or '0' it will be true.