Custom HTML Block Extension

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

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Detected usage of a non-sanitized input variable: $_GET['file']

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$_GET['file'] 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 possibly undefined superglobal array index: $_SERVER['REQUEST_URI']. Check that the array index exists before using it.

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load_plugin_textdomain() has been discouraged since WordPress version 4.6. When your plugin is hosted on WordPress.org, you no longer need to manually include this function call for translations under your plugin slug. WordPress will automatically load the translations for you as needed.

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Use of heredoc syntax (<<<) is not allowed; use standard strings or inline HTML instead

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Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: &quot;$option_name&quot;.

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In footer ($in_footer) is not set explicitly wp_enqueue_script; It is recommended to load scripts in the footer. Please set this value to `true` to load it in the footer, or explicitly `false` if it should be loaded in the header.

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Library files that are already in the WordPress core are not permitted.