File: wp-includes/load.php
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functionwp_set_lang_dir()
Sets the location of the language directory.
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functionrequire_wp_db()
Loads the database class file and instantiates the `$wpdb` global.
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functionwp_set_wpdb_vars()
Sets the database table prefix and the format specifiers for database table columns.
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functionwp_using_ext_object_cache()
Toggles `$_wp_using_ext_object_cache` on and off without directly touching global.
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functionwp_fix_server_vars()
Fixes `$_SERVER` variables for various setups.
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functionwp_start_object_cache()
Starts the WordPress object cache.
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functionis_ssl()
Determines if SSL is used.
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functionabsint()
Converts a value to non-negative integer.
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functionwp_convert_hr_to_bytes()
Converts a shorthand byte value to an integer byte value.
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functionis_wp_error()
Checks whether the given variable is a WordPress Error.