Warning during search in catalog by multiple custom option values. Warning should not be generated in log.

[arendarenko]

Warning: strip_tags() expects parameter 1 to be string, array given in /.../magento2/vendor/magento/framework/Filter/StripTags.php on line 48 happens when customer using catalog search with custom option values which is not exist (for example: they existed previously, but later was deleted).

Preconditions (*)

1. Magento 2.2.8 with sample data

Steps to reproduce (*)

1. Go to frontend -> Men -> Tops -> Hoodies & Sweatshirts
2. Choose black color
3. Change URL parameter material, add ",11111" to it value

Expected result (*)

1. Will be found products that related to "black" color filter

Actual result (*)

1. Founded products that related to "black" color filter
2. Received warning in log file: Warning: strip_tags() expects parameter 1 to be string, array given in /.../magento2/vendor/magento/framework/Filter/StripTags.php on line 48

[m2-assistant]

Hi @alexeya-ven. Thank you for your report.
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@alexeya-ven do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

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• no

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[m2-assistant]

Hi @engcom-Bravo. Thank you for working on this issue.
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[engcom-Bravo]

Hello, @alexeya-ven. Thanks for applying. You see, though the attribute is of type multiselect (in Your case materials) in the Backend, it's implementation in the Frontent (Layered Navigation) remains as of single choice type. Please take a note of the following product: Hero Hoodie - one of the products that appears on the page while following Your Steps to Reproduce. This product contains Fleece (value=145) as well as Hemp (value=146) materials. But in Layered Navigation section You can't chose, if You want to, Both of these materials, You can chose ether Fleece or Hemp. In both cases of course Hero Hoodie will appear among the outputted products. And once You have chosen one of the materials the materials filter is no longer available to add another value to it. So again, You are not able to get only those products that contain both materials at the same time, like Hero Hoodie. In the same way filtering via URL won't work ether. It will result in that warning, because the filtering function on some level expects only one value and not an array of values. So if you pass to Your URL "?materials=145,146" it will take to process only 145 and so will output all the products containing Fleece. As for the presence of other part after comma it will cast that warning.

[Nazar65]

Hi @engcom-Bravo the main reason that the warning should not be generated in log.

[engcom-Bravo]

@magento give me 2.3-develop instance

[Nazar65]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @Nazar65. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @Nazar65, here is your Magento instance.
Admin access: https://i-23557-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[engcom-Bravo]

@magento give me 2.3-develop instance