Description:
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The mysqli_stmt::bind_param() needs the “ready” variables but doesn’t accept the parameters as results – in such cases PHP parser outputs the Fatal error: Uncaught Error: “Cannot pass parameter 2 by reference”

Test script:
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Example 1 (it works):

$stmt->bind_param('i', 1)

Example 2 (it doesn’t work and Fatal error is signaled):

$stmt->bind_param('i', ($i + 1))

Expected result:
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I would expect this method working with the parameter’s values calculated in real time, not just only with “ready” values.

Actual result:
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Uncaught Error: Cannot pass parameter 2 by reference - for the code example 2