Are there any common mistakes or errors that could prevent the JSON output from being displayed in Mozilla?

One common mistake that could prevent JSON output from being displayed in Mozilla is not setting the correct content type header in the PHP script. To solve this issue, you need to set the content type header to "application/json" before outputting the JSON data. 

<?php
// Set the content type header to application/json
header('Content-Type: application/json');

// Your JSON data
$jsonData = array('key1' => 'value1', 'key2' => 'value2');

// Output the JSON data
echo json_encode($jsonData);
?>

Keywords

JSON output display Mozilla errors

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