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PHP - FDF Header Module
The fdf_header() function can set FDF specific output headers.
Syntax
void fdf_header( void )
The fdf_header() function is a convenience function to set appropriate HTTP headers for FDF output. This function can set Content-type: to application/vnd.fdf.
The fdf_header() function doesn't return any value after execution.
php_function_reference.htm
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