PHP simplexml_load_file - ignore xml object if it's empty

Question

I am using simplexml_load_file to gather information from an xml and put it in relevant places in a txt file.

I want to ignore certain parts if they are empty. For example if I have address line 1 to 5, and address line 5 is empty then I want it to be ignored.

Here is what I have tried to ignore empty objects:

if($xml->ContactAddress->Address5 != '') { fwrite($txt, $xml->ContactAddress->Address5 . "\r\n"); } if($xml->ContactAddress->Address5) { fwrite($txt, $xml->ContactAddress->Address5 . "\r\n"); }

With both of these a blank line is still being inputted, so what is the correct way to check if t is blank or not?

Jirka Hrazdil · Accepted Answer · 2017-11-23 16:11:37Z

1

Use isset():

if(isset($xml->ContactAddress->Address5)) { fwrite($txt, $xml->ContactAddress->Address5 . "\r\n"); }

answered Nov 23, 2017 at 16:11

Jirka Hrazdil

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6 Comments

Edward144 Over a year ago

That gives me an error: PHP Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead)

Edward144 Over a year ago

Is that because you havent got the address5 tag in the first part though. For me I will always have <address5></address5> Just sometimes empty, sometimes not

Edward144 Over a year ago

Sorry if empty it is actually: <Address5/>

Jirka Hrazdil Over a year ago

Sorry for that, misread the address line 5 is empty. Will update my answer momentarily.

Jirka Hrazdil Over a year ago

Comparing with empty string works as well - see https://3v4l.org/4X94d

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