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Certificate Verification

When calling a function that will verify a signature/certificate, the ca_info parameter is an array containing file and directory names that specify the locations of trusted CA files. If a directory is specified, then it must be a correctly formed hashed directory as the openssl command would use.

When calling a function that will verify a signature/certificate, the ca_info parameter is an array containing file and directory names that specify the locations of trusted CA files. If a directory is specified, then it must be a correctly formed hashed directory as the openssl command would use.

Source: reference/openssl/cert-verification.xml · from the official PHP manual (php/doc-en)