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clrc
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February 26, 2015 at 9:29 am
Hi There,
I’m getting this error showing when I try to have an invoice downloaded:
Fatal error: Cannot redeclare mb_substr() (previously declared in /var/www/html/clrc.org/wp-includes/compat.php:17) in /var/www/html/clrc.org/wp-content/plugins/event-espresso-core-reg/core/third_party_libs/dompdf/include/functions.inc.php on line 374
I found this thread about the same error, but am not sure if this is an appropriate solution:
https://eventespresso.com/topic/error-when-clicking-on-invoice-post-registration/
Running latest wp and EE4
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Josh
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February 26, 2015 at 11:59 am
Hi Matthew,
In wp-includes/compat.php it has this:
if ( !function_exists('mb_substr') ):
function mb_substr( $str, $start, $length=null, $encoding=null ) {
return _mb_substr($str, $start, $length, $encoding);
}
endif;
It looks like the above code is running before the dompdf code runs, which isn’t something we normally see.
Can you try added a !function_exists check to the mb_substr function /event-espresso-core-reg/core/third_party_libs/dompdf/include/functions.inc.php that starts on line 374? It will look like this after you add the check:
if ( !function_exists('mb_substr') ):
function mb_substr($string, $start, $length = null, $encoding = 'iso-8859-1') {
if ( is_null($length) )
return substr($string, $start);
else
return substr($string, $start, $length);
}
endif;
If the above fixes this for you, we can add the check in the next update.
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Josh
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February 27, 2015 at 12:09 pm
Hi Matthew,
We went ahead and looked into this some more and found that if a server does not have PHP’s mbstring extension installed, the function in compat.php ends up loading, and leads to the error message you are seeing.
So we added a fix that prevents the error, and it’s included in Event Espresso 4.6.12.p. You’ll get an update notification if you go to Event Espresso > General Settings, save the settings page, then go to your WordPress plugins page.
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