# openssl_csr_export_to_file

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

openssl_csr_export_to_file — Exports a CSR to a file

### Description

openssl_csr_export_to_file ( mixed `$csr` , string `$outfilename` [, bool `$notext` = `TRUE` ] ) : bool

openssl_csr_export_to_file() takes the Certificate Signing Request represented by `csr` and saves it in PEM format into the file named by `outfilename`.

### Parameters

`csr`

  See CSR parameters for a list of valid values.

`outfilename`

  Path to the output file.

`notext`

  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`.

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 openssl_csr_export_to_file() example

`<?php
$subject = array(
"commonName" => "example.com",
);
$private_key = openssl_pkey_new(array(
"private_key_bits" => 2048,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
));
$csr = openssl_csr_new($subject, $private_key, array('digest_alg' => 'sha384') );
openssl_pkey_export_to_file($private_key, 'example-priv.key');
// Along with the subject, the CSR contains the public key corresponding to the private key
openssl_csr_export_to_file($csr, 'example-csr.pem');
?>`

### See Also

- openssl_csr_export() - Exports a CSR as a string
- openssl_csr_new() - Generates a CSR
- openssl_csr_sign() - Sign a CSR with another certificate (or itself) and generate a certificate