Pauses or resumes sending/receiving on an active easy handle. This guide demonstrates its use in PHP code and explains when the result or side effect needs extra checks.
What It Does
Pauses or resumes sending/receiving on an active easy handle.
Syntax and Parameters
The examples below show a real call to curl_pause 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
$ch = curl_init('https://api.example.test/health');
curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 3, CURLOPT_CONNECTTIMEOUT => 2]);
$rc = curl_pause($ch, CURLPAUSE_CONT);
echo $rc === CURLE_OK ? "Transfers allowed" : "Pause operation 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
$ch = curl_init('https://api.example.test/products');
curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 4, CURLOPT_CONNECTTIMEOUT => 2]);
$rc = curl_pause($ch, CURLPAUSE_CONT);
echo $rc === CURLE_OK ? "Transfers allowed" : "Pause operation 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
$ch = curl_init('https://api.example.test/orders');
curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 5, CURLOPT_CONNECTTIMEOUT => 2]);
$rc = curl_pause($ch, CURLPAUSE_CONT);
echo $rc === CURLE_OK ? "Transfers allowed" : "Pause operation failed";In an application, convert low-level failures into controlled responses and log only non-sensitive diagnostic context.
Important Behavior and Edge Cases
Use CURLPAUSE_RECV, CURLPAUSE_SEND, CURLPAUSE_ALL or CURLPAUSE_CONT, not arbitrary integers.
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_pause | Pauses or resumes sending/receiving on an active easy handle. |
| Related API or pattern | curl_setopt configures transfer options, not the current pause state. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Forgetting destination validation, timeouts or TLS verification during a transfer | Use CURLPAUSE_RECV, CURLPAUSE_SEND, CURLPAUSE_ALL or CURLPAUSE_CONT, not arbitrary integers. |
| Substituting a related API without checking its semantics | curl_setopt configures transfer options, not the current pause state. |
Key Takeaways
- Pauses or resumes sending/receiving on an active easy handle.
- Use CURLPAUSE_RECV, CURLPAUSE_SEND, CURLPAUSE_ALL or CURLPAUSE_CONT, not arbitrary integers.
- curl_setopt configures transfer options, not the current pause state.
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.