PHP: Apply a common filter with filter_var_array?

Question

I've tried various combinations and permutations of filter_var_array() and have yet to find the answer to this:

Given a rather large associative array, I need to apply FILTER_SANITIZE_STRING with the FILTER_FLAG_STRIP_LOW flag to ALL of the elements in the array.

So:

filter_var_array($my_big_array,FILTER_SANITIZE_STRING);

applies the FILTER_SANITIZE_STRING filter but without the FILTER_FLAG_STRIP_LOW flag.

And...

filter_var_array($my_big_array,FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW);

Brings up an error.

Is it possible to easily apply a common filter using filter_var_array()?

I have an answer for you. See below. I'd appreciate the points if this is a good answer. Thanks! — Anthony Rutledge
– Anthony Rutledge, Commented May 13, 2015 at 13:05

Community · Accepted Answer · 2017-05-23 12:33:40Z

1

Good filter_var_array() syntax

The second filter_var_array() argument needs to be a proper $definition as per the PHP manual.

Example:

Just make sure you do not put the flags inside their own array. Options can be in an array, but the flags need to be seen as one whole thing separated by pipes.

   $def = [
             'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                             'flags'  => FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH],
             'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                             'flags'  => FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH]
          ];

edited May 23, 2017 at 12:33

CommunityBot

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answered May 13, 2015 at 13:03

Anthony Rutledge

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Comments

Chuck Le Butt · Accepted Answer · 2015-05-13 13:16:20Z

0

You should be able to combine them via binary operators, as in FILTER_SANITIZE_STRING & FILTER_FLAG_STRIP_LOW, but I haven't tested this yet.

edited May 13, 2015 at 13:16

Chuck Le Butt

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answered Feb 22, 2012 at 12:30

feeela

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1 Comment

Chuck Le Butt Over a year ago

Sadly this doesn't work afterall. It seems to destroy the array and lose all its data.

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