Why is json_encode Partially Failing on Array Encoding?

json_encode Partially Failing on Array Encoding

Problem:

json_encode is not producing JSON for certain queries in a PHP script that fetches data from a database and encodes it as JSON. The issue appears to be specific to particular continent codes, with some returning valid JSON while others result in empty output.

Cause:

json_encode requires all input data to be UTF-8 encoded. Some database records may contain characters that need to be converted to UTF-8 before being encoded as JSON.

Solution:

Ensure that all components of the web application use UTF-8 encoding. This can be achieved by setting the following configurations:

• Set the database character set to UTF-8.
• Configure your web server to send UTF-8 headers and interpret input as UTF-8.
• Use UTF-8 as the default encoding for your PHP code.

Here is a sample MySQL query to set the character set to UTF-8:

<code class="sql">ALTER DATABASE `database_name` CHARACTER SET utf8;</code>

Once UTF-8 encoding is established, json_encode should function correctly for all database records.

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