php - preg_replace: replace everything but -

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i want remove unwanted characters following string. here's code.

 $input="aecąßÄ1,.!?-_'\"/><";       $input=preg_replace('/[^\p{p}\p{l}\p{n}\s]*/u', '', $input);

the code seems working fine special characters lost in output. here's get.

   aec���1,.!?-_'"/

instead of 

 aecąßÄ1,.!?-_'"/

why so?

edit based on comment:

try use "real" characters:

$input=  preg_replace('/[^aecąßÄ1,.!?-_\'\"\/]/', '', $input);

last answer:

if want remove unwanted characters, can remove characters simpler regex:

$input= "aecąßÄ1,.!?-_'\"/><"; $input=  preg_replace('/[<>]/', '', $input);

just put special characters between [ ] in regex. works in case.


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