即使echo与DataTables匹配，JSON格式也会出错

Question

I run a lengthy PHP script I was modifying to PDO formatting as opposed to crappy mysql Db calls. At the end of the script, the $output is json encoded with:

echo json_encode( $output );

When I run the two scripts, the output to screen is IDENTICAL but my jquery DataTables program returns an error on the PDO encoded results and not the mysql return.

I have run regex's on the two results and they are IDENTICAL so why this is happening is beyond me.

Anybody ever had the same issue?

EDIT

DataTables error states:

DataTables warning: JSON data from server could not be parsed. This is caused by a JSON formatting error.

Answer 1

One method to use is to grab the JSON return from Firebug (or Webkit's inspector or whatever) and run it through http://jsonlint.com . If the JSON string is identical, then I would guess that there is something else being output (perhaps a PHP warning, or just an echo of a string somewhere) which is causing the parsing to fail. DataTables makes use of the JSON parser built into jQuery 1.4, and will give this error when the parser cannot decode the string.

If that doesn't help, are you able to give us a link to the page?