Which XML file(s) should be checked when the following Magento error occurs during installation? “PHP Extensions “0” must be loaded”

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dmitrii_fediuk (Dmitrii Fediuk) March 7, 2018, 10:21pm 1

config.xml in app/code/core/Mage/Install/etc
install.xml in app/code/core/Mage/Install/etc
extensions.xml in app/code/core/Mage/Install/etc
None of these

stackoverflow.com/a/16805444

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