Why is PHP\'s json_encode Function Encoding Data Inconsistently Based on Continent Code?

JSON Encoding Irregularity with PHP's json_encode

This issue arises when attempting to encode database table data into JSON using PHP's json_encode() function. Intriguingly, the behavior differs based on the input data.

Queries like "SELECT FROM countries WHERE continent_code='AS'" successfully return JSON values, while others, such as "SELECT FROM countries WHERE continent_code='EU'", fail to do so. Surprisingly, continent codes like 'EU', 'NA', and 'AF' behave differently from the rest.

Upon examining the code, we realize that the issue lies within the json_encode() function.

<code class="php">while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
  $orders[] = array(
    'CountryCode' => $row['code'],
    'CountryName' => $row['name']
  );
}

echo json_encode($orders);</code>

The data is successfully populated into the $orders array before being passed to json_encode(). However, the function fails to encode it for certain continent codes.

The key to resolving this issue lies in ensuring UTF-8 encoding throughout your web application.

• PHP Configuration: Set the encoding of all files to UTF-8.
• Database Configuration: Specify the character set for your database as UTF-8.
• Browser Configuration: Ensure that your browser is configured to use UTF-8 encoding.

By adhering to these guidelines, you can resolve the irregularity in JSON encoding and ensure the consistent behavior of your code for all input data.

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