File: wp-admin/includes/plugin.php
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functionget_mu_plugins()
Checks the mu-plugins directory and retrieve all mu-plugin files with any plugin data.
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functionget_plugin_data()
Parses the plugin contents to retrieve plugin’s metadata.
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Sanitizes plugin data, optionally adds markup, optionally translates.
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functionplugin_sandbox_scrape()
Loads a given plugin attempt to generate errors.