php stdClass check for property exist

Question

I have read some similar issues here but unfortunately find the solution for my case.

Some part of the output for an API connection is as;

stdClass Object (
    [page] => 0
    [items] => 5
    [total] => 5
    [saleItems] => stdClass Object (
        [saleItem] => Array (
            [0] => stdClass Object (
                [reviewState] => approved
                [trackingDate] => 2013-11-04T09:51:13.420+01:00
                [modifiedDate] => 2013-12-03T15:06:39.240+01:00
                [clickDate] => 2013-11-04T09:06:19.403+01:00
                [adspace] => stdClass Object (
                    [_] => xxxxx
                    [id] => 1849681 
                )
                [admedium] => stdClass Object (
                    [_] => Version 3
                    [id] => 721152
                )
                [program] => stdClass Object (
                    [_] => yyyy
                    [id] => 10853
                )
                [clickId] => 1832355435760747520
                [clickInId] => 0
                [amount] => 48.31
                [commission] => 7.25
                [currency] => USD
                [gpps] => stdClass Object (
                    [gpp] => Array (
                        [0] => stdClass Object (
                            [_] => 7-75
                            [id] => z0
                        )
                    )
                )
                [trackingCategory] => stdClass Object (
                    [_] => rers
                    [id] => 68722
                )
                [id] => 86erereress-a9e4-4226-8417-a46b4c9fd5df
            )
        )
    )
)

Some strings do not include gpps property.

What I have done is as follows

foreach($sales->saleItems->saleItem as $sale)
{
    $status     = $sale->reviewState;
    
    if(property_exists($sale, gpps)) 
    {
        $subId      = $sale->gpps->gpp[0]->_;
    }else{
        $subId      = "0-0";
    }
}

What I want is I the gpps property is not included in that string $subId stored as 0-0 in db, otherwise get the data from the string. But it doesn't get the strings without gpps.

Where is my mistake?

this means you used it wrong, use isset and maybe empty to check situation when property is set but has no elements — Iłya Bursov
– Iłya Bursov, Commented Dec 4, 2013 at 20:58
when I use isset($sale->gpps) or property_exists($sale, 'gpps') I only change this part of my code that I wrote above. Is there anything wrong for rest of the code? Because none of them is working — june8
– june8, Commented Dec 4, 2013 at 21:14

Matteo Tassinari · Accepted Answer · 2021-07-26 10:43:12Z

117

Change

if(property_exists($sale, gpps))

with

if(property_exists($sale, "gpps"))

notice how now gpps is passed as string, as per the signature of the property_exists function:

bool property_exists ( mixed $class , string $property )

This function checks if the given property exists in the specified class.

Note: As opposed with isset(), property_exists() returns TRUE even if the property has the value NULL.

edited Jul 26, 2021 at 10:43

answered Dec 4, 2013 at 21:11

Matteo Tassinari

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Community · Accepted Answer · 2023-11-17 20:42:18Z

3

property_exists is the method designed for this purpose.

bool property_exists ( mixed $class , string $property )

This function checks if the given property exists in the specified class.

Note: As opposed with isset(), property_exists() returns TRUE even if the property has the value NULL.

edited Nov 17, 2023 at 20:42

CommunityBot

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answered Dec 4, 2013 at 21:09

JC.

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Comments

Qullbrune · Accepted Answer · 2013-12-05 11:24:08Z

0

Try a simple hack and use count, since the property contains an array, and I guess, that count(array) == 0 is the same case as when the property is not set.

foreach($sales->saleItems->saleItem as $sale)
{
 $status     = $sale->reviewState;

 if(@count($sale->gpps->gpp) && count($sale->gpps->gpp) > 0) 
 {
    $subId      = $sale->gpps->gpp[0]->_;
 }else{
    $subId      = "0-0";
 }
}

Sure, this is not the most beautiful solution, but since the php-function do not work as expected, I thought a bit more pragmatic.

answered Dec 5, 2013 at 11:24

Qullbrune

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Comments

Fevly Pallar · Accepted Answer · 2016-12-13 23:38:46Z

0

Another way , get_object_vars

$obj = new stdClass();
$obj->name = "Nick";
$obj->surname = "Doe";
$obj->age = 20;
$obj->adresse = null;

$ar_properties[]=get_object_vars($obj);

foreach($ar_properties as $ar){
    foreach ($ar as $k=>$v){        
    if($k =="surname"){
        echo "Found";
    }
    }
}

answered Dec 13, 2016 at 23:38

Fevly Pallar

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