Legacy alias of openssl_pkey_get_public() for loading a public key.
Before using it, identify which data, connection or runtime state the operation reads or changes. This avoids examples that appear to work but apply to a different context.
What Is openssl_get_publickey() in PHP?
Legacy alias of openssl_pkey_get_public() for loading a public key.
Syntax:
<?php
// Signature for reference only
openssl_get_publickey($public_key) : OpenSSLAsymmetricKey|false
Parameters and Return Value
$public_key— Required value argument supplied to this operation.
The declared return type is OpenSSLAsymmetricKey|false.
Example 1: Basic Usage
<?php
print_r(openssl_get_publickey());Legacy alias of openssl_pkey_get_public() for loading a public key.
Example 2: Another Case
<?php
$availableItems = openssl_get_publickey();
echo count($availableItems);The second sample illustrates a different way to inspect or handle this operation. Configure the underlying session, socket, key material or connection first.
Practical Example
<?php
$availableItems = openssl_get_publickey();
foreach (array_slice($availableItems, 0, 5) as $item) { echo is_array($item) ? json_encode($item) : $item; echo "\n"; }The practical example is a teaching scenario. Change sample configuration and credentials before using a similar design in an application.
Important Behavior and Edge Cases
- Use trusted certificate and key material; never print private keys or disclose secrets in logs.
- Relevant PHP environment: openssl. Ensure the required extension and operating-system capabilities are present.
- Check results and release resources where necessary; successful syntax alone does not guarantee a successful operation.
Comparison With Related Functions
| Option | When to Use It |
|---|---|
openssl_get_publickey | Legacy alias of openssl_pkey_get_public() for loading a public key. |
openssl_pkey_get_details | Use this related operation for its different responsibilities; do not assume identical inputs or return values. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Confusing public and private keys | Use the appropriate key type for each operation and never disclose secret key data. |
| Assuming every algorithm is safe for every purpose | Choose modern algorithms and protocol combinations supported by your deployment. |
| Printing certificate and key material to visitors | Keep cryptographic diagnostics restricted and redact secrets. |
Key Takeaways
- Legacy alias of openssl_pkey_get_public() for loading a public key.
- Use trusted certificate and key material; never print private keys or disclose secrets in logs.
- Validate inputs and handle failure conditions before integrating this operation into a production workflow.
Legacy alias of openssl_pkey_get_public() for loading a public key. Use the appropriate runtime and treat any environment-dependent output as an example, not a guaranteed result.