id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
20522	the sanitize_file_name_chars filter and ch(0)	olivM		"the sanitize_file_name_chars filter is tricky to use due to the chr(0) ending the array :

both 
{{{
special_chars[] = $my_char; 
}}}
and 
{{{
array_push($special_chars, $mychar);
}}}
have no effect.

so the only way to add some char to the array is to use array_unshift :
{{{
array_unshift($special_chars, $mychar);
}}}

adding 

this is mostly a php issue, but it could be useful to add some notice to the WordPress documentation.

"	enhancement	new	normal	Awaiting Review	Formatting		minor		needs-docs needs-unit-tests