Warning: fread(): Length parameter must be greater than 0 mo-reader.php on line

Hello,

Could you identify which translation file (.mo) is causing this error and share it?

Isn’t there easily a large amount of these mo-files?

Any suggestions how to identify the problem. Maybe disable plug-ins one by one with wp cli? Or just check the logs?

Yes, disabling the plugins one by one should help to identify it. It may come from the theme too.

Would it be possible to temporarily modify the code in /dynamo/src/mo-reader.php to output the name of the problematic file and perhaps some other debug info in the log warning?

Would you have and example how this code could look like?

• This reply was modified 2 years, 11 months ago by ehau.
• This reply was modified 2 years, 11 months ago by ehau.

Yes. That should be possible. However, the function where the error occurs doesn’t have access to the filename, so we must pass to it first.

In src/mo.php at line 72, replace:
if ( ! $reader->parse( $mem_handle ) ) {
by
if ( ! $reader->parse( $mem_handle, $filename ) ) {

In src/mo-reader.php at line 42, replace:
public function parse( $handle ) {
by
public function parse( $handle, $filename ) {

In src/mo-reader.php just before the line 129, add:
if ( $translations[ (int) $headers_idx ] <= 0 ) print_r( $filename );

If print_r() doesn’t work, you may try with error_log().

Hello @ehau

Did you succeed to identify the translation file causing the issue? I am planning to release a new version with a new translation method supporting object cache, and it would be great if I could solve this bug in this same release.

I have this same error.
The filename is wp-content/languages/wpml/wordpress-ja.mo
and the value is zero

Not sure how to show you this file!
The content of the file is this hex:

DE 12 04 95 00 00 00 00 07 00 00 00 1C 00 00 00 54 00 00 00 00 00 00 00 8C 00 00 00 00 00 00 00 8C 00 00 00 18 00 00 00 8D 00 00 00 18 00 00 00 A6 00 00 00 11 00 00 00 BF 00 00 00 07 00 00 00 D1 00 00 00 10 00 00 00 D9 00 00 00 0B 00 00 00 EA 00 00 00 00 00 00 00 F6 00 00 00 10 00 00 00 F7 00 00 00 0B 00 00 00 08 01 00 00 07 00 00 00 14 01 00 00 07 00 00 00 1C 01 00 00 10 00 00 00 24 01 00 00 0B 00 00 00 35 01 00 00 00 55 52 4C 20 70 72 6F 64 75 63 74 5F 63 61 74 20 74 61 78 20 73 6C 75 67 00 55 52 4C 20 70 72 6F 64 75 63 74 5F 74 61 67 20 74 61 78 20 73 6C 75 67 00 55 52 4C 20 73 6C 75 67 3A 20 70 72 6F 64 75 63 74 00 70 72 6F 64 75 63 74 00 70 72 6F 64 75 63 74 2D 63 61 74 65 67 6F 72 79 00 70 72 6F 64 75 63 74 2D 74 61 67 00 00 70 72 6F 64 75 63 74 2D 63 61 74 65 67 6F 72 79 00 70 72 6F 64 75 63 74 2D 74 61 67 00 70 72 6F 64 75 63 74 00 70 72 6F 64 75 63 74 00 70 72 6F 64 75 63 74 2D 63 61 74 65 67 6F 72 79 00 70 72 6F 64 75 63 74 2D 74 61 67 00

Hello,

Yes, .mo files are binary so not readable for humans. A link to download the file would be great. That way, I would be able to use it in tests.