wp-mpdf

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

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Functions declared in the global namespace by a theme/plugin should start with the theme/plugin prefix. Found: "ParseGeshi".

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Processing form data without nonce verification.

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Hook names invoked by a theme/plugin should start with the theme/plugin prefix. Found: "the_content".

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

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

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Hidden files are not permitted.

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The plugin name includes a restricted term. Your chosen plugin name - "wp-mpdf" - contains the restricted term "wp" which cannot be used at all in your plugin name.

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Attempting a database schema change is discouraged.

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Global constants defined by a theme/plugin should start with the theme/plugin prefix. Found: "WP_MPDF_ALLOWED_POSTS_DB".

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

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Plugin folders are deleted when upgraded. Do not save data to the plugin folder using file_put_contents(). Detected usage of function plugin_dir_path(). Use wp_upload_dir() to get the uploads directory path or save to the database instead.

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It is not necessary to prepare a query which doesn't use variable replacement.

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wp_redirect() found. Using wp_safe_redirect(), along with the "allowed_redirect_hosts" filter if needed, can help avoid any chances of malicious redirects within code. It is also important to remember to call exit() after a redirect so that no other unwanted code is executed.