PHP curl_share_close() Function: Usage and Examples

Historically closes a cURL share handle. This guide demonstrates its use in PHP code and explains when the result or side effect needs extra checks.

What It Does

Historically closes a cURL share handle.

Syntax and Parameters

The examples below show a real call to curl_share_close 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.

Compatibility and security: Deprecated since PHP 8.5; no effect on PHP 8.0+ object handles.

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);
curl_share_close($share);
echo "Legacy no-op; prefer releasing the share reference";

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);
curl_share_close($share);
echo "Legacy no-op; prefer releasing the share reference";

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);
curl_share_close($share);
echo "Legacy no-op; prefer releasing the share reference";

In an application, convert low-level failures into controlled responses and log only non-sensitive diagnostic context.

Important Behavior and Edge Cases

No effect since PHP 8.0; deprecated since PHP 8.5; avoid in new code.

TLS validation, bounded timeouts and a destination allowlist are essential for network requests involving potentially untrusted targets.

Comparison with Related Functions or Patterns

Common Beginner Mistakes

Key Takeaways

• Historically closes a cURL share handle.
• No effect since PHP 8.0; deprecated since PHP 8.5; avoid in new code.
• unset($share) releases the PHP reference; curl_share_init creates 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.