Flexible Invoices for WooCommerce – KSeF Add-on

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Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$key".

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All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '$customer_country'.

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Missing $domain parameter in function call to esc_attr_e().

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The $text parameter must be a single text string literal. Found: $code_description

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date() is affected by runtime timezone changes which can cause date/time to be incorrectly displayed. Use gmdate() instead.

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PHP file should prevent direct access. Add a check like: if ( ! defined( 'ABSPATH' ) ) exit;

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Hook names invoked by a theme/plugin should start with the theme/plugin prefix. Found: "fir/core/export/string_as_money".

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A function call to esc_html__() with texts containing placeholders was found, but was not accompanied by a "translators:" comment on the line above to clarify the meaning of the placeholders.

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Hidden files are not permitted.

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Plugin name "Flexible Invoices for WooCommerce - KSeF Add-on" is different from the name declared in plugin header "Flexible Invoices KSeF".