Plugin Notes

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

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

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

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

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

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A function call to __() 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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The plugin name includes a restricted term. Your chosen plugin name - "Plugin Notes" - contains the restricted term "plugin" which cannot be used at all in your plugin name.

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The use of function create_function() is forbidden

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

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