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wp_parse_args

Merge user defined arguments into defaults array.This function is used throughout WordPress to allow for both string or array to be merged into another array.

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wp_original_referer_field

Retrieve or display original referer hidden field for forms.The input name is ‘_wp_original_http_referer’ and will be either the same value of wp_referer_field(), if that was posted already or it will be the current page, if it doesn’t exist.

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wp_ob_end_flush_all

Flush all output buffers for PHP 5.2.Make sure all output buffers are flushed before our singletons our destroyed.

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wp_nonce_field

Retrieve or display nonce hidden field for forms.The nonce field is used to validate that the contents of the form came from the location on the current site and not somewhere else. The nonce does not offer absolute protection, but should protect against most cases. It is very important to use nonce field in forms.

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