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phparrayssanitize

php use filter_var_array to strip anything but a-z

I am trying to remove all characters from my array values except for the a-z characters using the filter_var_array function.

I tried applying multiple filters but unfortunatly none of them did the trick for me, is there any other way to do this using this function or am I forced to use something like regex in a foreach loop to do this?

Solution

  • preg_replace() already works quite naturally on an array. This removes all non-alphas from an array of strings:

    $array = preg_replace('/[^a-z]/i', '', $array);

    Example:

    $a = array('1111A55b999c0000','111111def9999999','0000000g88888hi8888888');
$a = preg_replace('/[^a-z]/i', '', $a);
assert($a == array('Abc','def','ghi'));

    I'm guessing you may want case-insensitivity. If you truly want to strip out uppercase letters as well, just remove the i.