Check for existing values with if in foreach?

Question

I have array with already existing values:

$existingValues = array();

now i get new values in xml file (is a import script) but i have to avoid insert of already existing values, my question is, how can i do a if check in foreach where i list all new values from xml?

$i = 1;

foreach($node->children() as $child) :
    $attribute2 = $child->attributes();
    $productcode = $attribute2['sku'];
    $productvariant = $attribute2['variantid'];
    $productprice = $attribute2['price'];

    if ($attribute2['sku']) :
        echo $productcode . ' - ' . $productvariant . '<br>';
    endif;

    $i++;      
endforeach;

I tried with in_array() but it's not correct.

How do you identify elements? I can see that every element has some fields (sku, variantid, price). What is the id of each element? sku maybe? — Giorgio
– Giorgio, Commented Feb 9, 2015 at 14:25
Ahh sorry, yes i have to check sku, if sku from array and sku from xml is the same then ignore... — m_73
– m_73, Commented Feb 9, 2015 at 14:27

magon · Accepted Answer · 2015-02-09 14:31:56Z

1

You can create an array wich stores the products and test if the current product is already in the array:

$i = 1;
$products = array();

foreach($node->children() as $child) :
    $attribute2 = $child->attributes();
    $productcode = $attribute2['sku'];
    $productvariant = $attribute2['variantid'];
    $productprice = $attribute2['price'];

    if ($attribute2['sku'] && !in_array($productcode, $products)) :
        echo $productcode . ' - ' . $productvariant . '<br>';
    endif;

    $products[] = $productcode;

    $i++;      
endforeach;

answered Feb 9, 2015 at 14:31

magon

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Comments

Giorgio · Accepted Answer · 2015-02-09 14:41:24Z

0

You can create a $existingSKU array, extracting sku from existing elements. Then you can compare current sku with existing, and if not present, you can add element to existing.

// build existing sku array
$existingSKU = array();
foreach($existingValues as $value)
{
    array_push($existingSKU, $value['sku']);
}

// add element to existing, if not present
foreach($node->children() as $child)
{
    $attribute2 = $child->attributes();

    if(!in_array($attribute2['sku'], $existingSKU))
    {
       array_push($existingValues, $attribute2);
    }
}

Since you don't use it, you can remove $i.

answered Feb 9, 2015 at 14:41

Giorgio

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