Description:
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The problem that the function libxml_disable_entity_loader shares its state between requests, that was reported and fixed for fpm in https://bugs.php.net/bug.php?id=64938, does also effect the sapi „cgi-fcgi“(php fastcgi). Our hoster uses this sapi in connection with apache2 and we have noticed the same behaviour. To reproduce that, use the following two scripts. First call Script 1 and than immediately call Script 2.

Test script:
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#Script 1
<?php

libxml_disable_entity_loader(true);

#Script 2
<?php

die(var_dump(libxml_disable_entity_loader(false)));

Expected result:
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Script 2 should always return false.

Actual result:
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Script 2 returns true. (if other processes running on the server influencing libxml_disable_entity_loader the test has to been repeated a few times)