Description:
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This is very similar to #74514. When the session is started, and session_cache_expire() is called without an argument, it still triggers a warning: Cannot change cache expire when session is active.

Test script:
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<?php

session_start();
session_cache_expire();


Expected result:
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No warning triggered

Actual result:
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Warning: session_cache_expire(): Cannot change cache expire when session is active in test.php on line 4

Call Stack:
    0.0000     397096   1. {main}() test.php:0
    0.0001     397488   2. session_cache_expire() test.php:4