How to fix error "Use of undefined constant id - assumed 'id'" when parse xml file?

Question

Possible Duplicate:
SimpleXML Reading node with a hyphenated name

I parse xml file which contain fields like that:

<offers>
    <offer>
       <type>Vehicle</type>
       <type-id>2</type-id>
       <category>Car</category>
       <category-id>3</category-id>
       ...
    </offer>
    <offer>
       <type>Vehicle</type>
       <type-id>2</type-id>
       <category>Car</category>
       <category-id>3</category-id>
       ...
    </offer>
    ...
</offers>

Use $xml = simplexml_load_file($file); first and after trying to get values in foreach loop I get error "Use of undefined constant id - assumed 'id'" for field contain 'id' as part of them, like 'type-id' or 'category-id'

 foreach($xml->offers->offer as $offer) {
                    echo $offer->type; // WORKS JUST FINE
                echo $offer->type-id; //THIS GIVE ME ERROR                              
              }

I trying to set ini_set('error_reporting', E_ALL & ~E_NOTICE); but after it field with 'id' return zero instead of value.

To access values that have `-` inside of them, you need to put them into brackets as string: `echo $offer->{'type-id'};` — Peon, Jan 17 '13 at 09:57
More info http://stackoverflow.com/questions/3214153/parse-error-syntax-error-unexpected-t-object-operator — electroid, Jan 20 '13 at 12:45

score 6 · Accepted Answer · answered Jan 17 '13 at 09:55

6

The name of the variable is "type-id", which cannot be written simply as $type-id, you need to use curly brackets to access it: ${"type-id"}

echo $offer->{"type-id"};

answered Jan 17 '13 at 09:55

Dutow

5,638
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score 1 · Answer 2 · answered Jan 17 '13 at 09:54

1

Try this one:

foreach($xml->offers->offer as $offer) {
    echo $offer->type;
    $typeId = 'type-id';
    echo $offer->{$typeId};                        
}

answered Jan 17 '13 at 09:54

noslone

1,301
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score 0 · Answer 3 · answered Jan 17 '13 at 09:54

0

you have to access the object/variable using { and }

echo $offer->{type-id};

answered Jan 17 '13 at 09:54

hank

3,748
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This will subtract two undefined constants, "type" and "id", and use the result as a field name – John Dvorak Jan 17 '13 at 10:00

How to fix error "Use of undefined constant id - assumed 'id'" when parse xml file?

3 Answers3