Controls which classes of libcurl data an easy-handle group shares. This guide demonstrates its use in PHP code and explains when the result or side effect needs extra checks.
What It Does
Controls which classes of libcurl data an easy-handle group shares.
Syntax and Parameters
The examples below show a real call to curl_share_setopt with suitable arguments. Read the function call in context: its connection, handle, input data or other prerequisites are created before use.
Requirements: cURL extension; HTTP client and transfer-handling tools.
Example 1: Core Behavior
The first case demonstrates the precise handle or result type.
<?php
$share = curl_share_init();
curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
$ok = curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
echo $ok ? "Sharing enabled" : "Share option failed";Observe the returned value or changed resource state. A successful function call can still require additional checks before a higher-level operation is considered successful.
Example 2: Alternative or Failure Case
The second case checks behavior under a different configuration or request.
<?php
$share = curl_share_init();
curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
$ok = curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
echo $ok ? "Sharing enabled" : "Share option failed";Compare the different inputs, environment assumptions or result checks. Do not use a transport-level success value as proof that all business-level requirements were met.
Practical Example: Applying the Rule
The practical case shows how to inspect the operation outcome instead of assuming success.
<?php
$share = curl_share_init();
curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
$ok = curl_share_setopt($share, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
echo $ok ? "Sharing enabled" : "Share option failed";In an application, convert low-level failures into controlled responses and log only non-sensitive diagnostic context.
Important Behavior and Edge Cases
Share only data appropriate for the users and trust boundaries of those requests.
TLS validation, bounded timeouts and a destination allowlist are essential for network requests involving potentially untrusted targets.
Comparison with Related Functions or Patterns
| Approach | When it differs |
|---|---|
| curl_share_setopt | Controls which classes of libcurl data an easy-handle group shares. |
| Related API or pattern | curl_setopt with CURLOPT_SHARE associates an easy handle with the share handle. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Sharing per-user state without checking isolation boundaries | Share only data appropriate for the users and trust boundaries of those requests. |
| Substituting a related API without checking its semantics | curl_setopt with CURLOPT_SHARE associates an easy handle with the share handle. |
Key Takeaways
- Controls which classes of libcurl data an easy-handle group shares.
- Share only data appropriate for the users and trust boundaries of those requests.
- curl_setopt with CURLOPT_SHARE associates an easy handle with the share handle.
Select this API or pattern based on its documented behavior and the trust boundaries in your own application, and test all external integrations against their actual deployments.