openssl_csr_export_to_file Exports a CSR to a file boolopenssl_csr_export_to_file resourcecsr stringoutfilename boolnotext &warn.experimental.func; openssl_csr_export_to_file takes the CSR represented by csr and saves it into the file named by outfilename. The optional notext affects the verbosity of the output; if it is &false; then additional human-readable information is included in the output.