Встановлення

To use PHP's OpenSSL support you must also compile PHP --with-openssl.

The OpenSSL library also has additional requirements for normal operation at run-time. Most notably, OpenSSL requires access to a random or pseudo-random number generator; on most Unix and Unix-like platforms (including Linux), this means that it must have access to a /dev/urandom or /dev/random device.

The configure option --with-system-ciphers is available which causes PHP to use the system cipher list instead of a hard-coded default.

Зауваження: Note to Win32 Users

Щоб це розширення працювало у Windows, системна змінна PATH повинна мати доступ до файлів DLL. Як це зробити, написано в ЧаПах під назвою "Як додати PHP-теку до PATH у Windows". Хоча копіювання DLL-файлів з PHP-теки в системну теку Windows теж спрацює (тому, що системна тека зазвичай є в змінній PATH), проте цього не слід робити. Це розширення вимагає, щоб наступні файли були в PATH: libeay32.dll, or, as of OpenSSL 1.1, libcrypto-*.dll

Additionally, if you are planning to use the key generation and certificate signing functions, you will need to install a valid openssl.cnf file on your system. We include a sample configuration file in our win32 binary distributions, in the extras/ssl directory.

PHP will search for the openssl.cnf using the following logic:

• the OPENSSL_CONF environmental variable, if set, will be used as the path (including filename) of the configuration file.
• the SSLEAY_CONF environmental variable, if set, will be used as the path (including filename) of the configuration file.
• The file openssl.cnf will be assumed to be found in the default certificate area, as configured at the time that the openssl DLL was compiled. This is usually means that the default filename is C:\Program Files\Common Files\SSL\openssl.cnf (x64) or C:\Program Files (x86)\Common Files\SSL\openssl.cnf (x86), or, prior to PHP 7.4.0, C:\usr\local\ssl\openssl.cnf.

In your installation, you need to decide whether to install the configuration file in the default path or whether to install it someplace else and use environmental variables (possibly on a per-virtual-host basis) to locate the configuration file. Note that it is possible to override the default path from the script using the options of the functions that require a configuration file.

Застереження

Ensure that non-privileged users are not allowed to modify openssl.cnf.

As of OpenSSL 3.0.0, which is used on Windows by default as of PHP 8.2.0, several algorithms have been deemed legacy. Such algorithms have commonly fallen out of use, have been deemed insecure by the cryptography community, or something similar. These algorithms are still available via the legacy provider (extras/ssl/legacy.dll); its usage is described in the » provider configuration section of the OpenSSL manual.