What are common errors encountered when trying to sort Amazon API articles by price in PHP?

When trying to sort Amazon API articles by price in PHP, a common error is not properly parsing the price data before sorting. Prices are often returned as strings with currency symbols, commas, and decimal points, so they need to be converted to numerical values for accurate sorting. To solve this, you can use a custom sorting function that extracts the numerical value from the price string before comparing. 

// Sample array of Amazon API articles with prices
$articles = [
    ['title' => 'Product A', 'price' => '$49.99'],
    ['title' => 'Product B', 'price' => '$29.99'],
    ['title' => 'Product C', 'price' => '$39.99'],
];

// Custom sorting function to sort articles by price
usort($articles, function($a, $b) {
    $priceA = (float) filter_var($a['price'], FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
    $priceB = (float) filter_var($b['price'], FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
    
    return $priceA <=> $priceB;
});

// Output sorted articles
foreach ($articles as $article) {
    echo $article['title'] . ' - ' . $article['price'] . PHP_EOL;
}

Keywords

Amazon API sorting price PHP errors articles

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