Elegant Custom Fonts

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

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Detected usage of a possibly undefined superglobal array index: $_POST['font_family_name']. Check that the array index exists before using it.

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$_POST['font_family_name'] not unslashed before sanitization. Use wp_unslash() or similar

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Processing form data without nonce verification.

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Detected usage of a non-sanitized input variable: $_POST['font_family_name']

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File operations should use WP_Filesystem methods instead of direct PHP filesystem calls. Found: mkdir().

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Resource version not set in call to wp_enqueue_style(). This means new versions of the style may not always be loaded due to browser caching.

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

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Missing "License". Please update your readme with a valid GPLv2 (or later) compatible license.

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Tested up to: 6.3 < 7.0. The "Tested up to" value in your plugin is not set to the current version of WordPress. This means your plugin will not show up in searches, as we require plugins to be compatible and documented as tested up to the most recent version of WordPress.