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# openssl_get_publickey

(PHP 4 >= 4.0.4)

openssl_get_publickey -- Extract public key from certificate and prepare it for use

## Description

``resource openssl_get_publickey` (mixed certificate)`

Warning
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.

Returns a positive key resource identifier on success, or `FALSE` on error.

openssl_get_publickey() extracts the public key from an X.509 certificate specified by `certificate` and prepares it for use by other functions.

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