Description:
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When including a non-existant file with include(), PHP halts execution claiming there is a parse error in the included file.

"Fatal error: Parse error inside included file. in /path/to/file.php on line 3"

This makes it impossible to "attempt" inclusion of a file without halting the script if it can't be found. The behaviour only applies to include() and not include_once(), require() or require_once().

Maybe this is related to #26814.

Reproduce code:
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<?php

@include 'missing-file.php';
echo 'Test';

?>

Expected result:
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The script should output "Test".

Actual result:
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There is no output (a blank page).