Exports a CSR to a file

# openssl_csr_export_to_file

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

openssl_csr_export_to_file — Exports a CSR to a file

### Description

openssl_csr_export_to_file(OpenSSLCertificateSigningRequest|string `$csr`, string `$output_filename`, bool `$no_text` = `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 `output_filename`.

### Parameters

`csr`

  See CSR parameters for a list of valid values.

`output_filename`

  Path to the output file.

`no_text`

  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.

### Changelog

Version | Description
--- | ---
8.0.0 | `csr` accepts an OpenSSLCertificateSigningRequest instance now; previously, a resource of type `OpenSSL X.509 CSR` was accepted.

### 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

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open