What are the potential pitfalls of using json_encode with characters above ASCII 128 in PHP?

When using json_encode in PHP with characters above ASCII 128, the default behavior may result in encoding issues or data loss. To ensure proper encoding of these characters, you can use the JSON_UNESCAPED_UNICODE flag in the json_encode function. This flag prevents the conversion of non-ASCII characters to Unicode escape sequences, preserving the original characters in the encoded JSON output. 

$data = ["name" => "Jöhn Döe"];
$json = json_encode($data, JSON_UNESCAPED_UNICODE);
echo $json;

Keywords

json_encode ASCII encoding Unicode characters

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