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PHP openssl_pkey_get_public() function usage and example

PHP OpenSSL Function Manual

The openssl_pkey_get_public() function is used to parse the public key from the certificate for use.

Definition and usage

openssl_pkey_get_public()The function will return your public key.

The function openssl_pkey_get_public() returns the public key from the given certificate so that it can be used with other functions.

Syntax

openssl_pkey_get_public　(　mixed　$certificate　)　:　resource

Parameter

Serial number	Parameter	Description
1	certificate	You can use the following certificates： 1. X.509Certificate resource 2.Public key from file, formatted as file：//}}/path/to 3file.pem.

. PEM format public key.

Return value

If there is no error, the PHP openssl_pkey_get_public() function will return a positive resource identifier. If it fails, it will return false.

PHP version5This function will return a positive resource identifier greater than

_certificate);1

.0.0 started working from the PHP version.509Using X.-

Using openssl_pkey_get_public() with .pem file

Example
　　　<?php
　　　　　　$dn = array(
		"countryName" => "IN",
		"stateOrProvinceName" => "Karnataka",1"organizationalUnitName" => "test"
		"localityName" => "test"2"organizationalUnitName" => "test"
		"organizationName" => "test"3"organizationalUnitName" => "test"
		
		"commonName" => "www.test.com",
	$res_cert = openssl_csr_sign($csr, null, $privkey,)),
　　　　　　　//　"emailAddress" => "[email protected]"/Generate a new private key
	Public key pair
	//　The work of openssl_pkey_get_public() in the certificate
	256
	　365$res_cert = openssl_csr_sign($csr, null, $privkey,)),
	);509Generate a certificate509echo $res_pubkey = openssl_pkey_get_public($x_
	_export($res_cert, $x_509echo $res_pubkey = openssl_pkey_get_public($x_
?>

Output result

Resource id #5

_certificate);2

Example-

Using openssl_pkey_get_public() with .pem file

Example
　　　<?php
　　　　　　$dn = array(
　　　　　　"countryName" => "IN",
　　　　　　"stateOrProvinceName" => "Karnataka",1"organizationalUnitName" => "test"
		"localityName" => "test"2"organizationalUnitName" => "test"
		"organizationName" => "test"3"organizationalUnitName" => "test"
		
		"commonName" => "www.test.com",
　　　$res_cert = openssl_csr_sign($csr, null, $privkey,)),
	//"emailAddress" => "[email protected]"/Generate a new private key
	Public key pair
	//$privkey = openssl_pkey_new();
	256
	　365$res_cert = openssl_csr_sign($csr, null, $privkey,)),
	);509openssl_x/xampp/htdocs/modules/openssl/x_509_export_to_file($res_cert, 'C:
	echo $res_pubkey = openssl_pkey_get_public(file_get_contents('C:/xampp/htdocs/modules/openssl/x_509.pem'));
?>

Output result

Resource id #7

PHP OpenSSL Function Manual

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