(PHP 4 >= 4.2.0, PHP 5)
openssl_csr_export_to_file — Exports a CSR to a file
说明bool openssl_csr_export_to_file ( resource $csr , string $outfilename [, bool $notext = true ] )
openssl_csr_export_to_file() takes the Certificate Signing Request represented by csr and saves it as ascii-armoured text into the file named by outfilename.
Path to the output file.
The optional parameter notext affects the verbosity of the output; if it is FALSE, then additional human-readable information is included in the output. The default value of notext is TRUE.
成功时返回 TRUE， 或者在失败时返回 FALSE.