February 12, 2011 
Definition:
function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {}
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.
Parameters
- string $action: Optional. Action name.
- string $name: Optional. Nonce name.
- bool $referer: Optional, default true. Whether to set the referer field for validation.
- bool $echo: Optional, default true. Whether to display or return hidden form field.
Return values
returns:Nonce field.
Source code
function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
$name = esc_attr( $name );
$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
if ( $referer )
$nonce_field .= wp_referer_field( false );
if ( $echo )
echo $nonce_field;
return $nonce_field;
}
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