How can the header 'Content-Type: application/json' impact the output of json_encode in PHP?

Setting the header 'Content-Type: application/json' informs the client that the response being sent is in JSON format. This can impact the output of json_encode in PHP by ensuring that the client interprets the response correctly. Without setting this header, the client may not recognize the response as JSON and may encounter parsing errors. 

<?php
// Set the header to inform the client that the response is in JSON format
header('Content-Type: application/json');

// Encode data into JSON format
$data = array('key1' => 'value1', 'key2' => 'value2');
echo json_encode($data);
?>

Keywords

header Content-Type application/json json_encode output

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