Description:
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Many tests have input values like 10.5e10 that must be converted to integer values. On 32-bit systems, the conversion overflows. According to the PHP manual:

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If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31), the result is undefined, since the float doesn't have enough precision to give an exact integer result. No warning, not even a notice will be issued when this happens!
---

Therefore, the tests are attempting to verify undefined values.

Reproduce code:
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We found a bunch of testcases with this issue by running in a ppc64 kernel / ppc32 userspace:

ext/standard/tests/array/array_fill_variation1.phpt
ext/standard/tests/array/array_keys_variation_002.phpt
ext/standard/tests/general_functions/gettype_settype_variation2.phpt
ext/standard/tests/strings/htmlspecialchars_decode_variation2.phpt
ext/standard/tests/strings/pack.phpt
ext/standard/tests/strings/sprintf_variation35.phpt
ext/standard/tests/strings/sprintf_variation4.phpt
ext/standard/tests/strings/sprintf_variation41.phpt
ext/standard/tests/strings/strncasecmp_variation5.phpt
ext/standard/tests/strings/strncmp_variation5.phpt
ext/standard/tests/strings/strrpos_variation14.phpt
ext/standard/tests/strings/strrpos_variation15.phpt
ext/standard/tests/strings/vsprintf_variation15.phpt
ext/standard/tests/strings/vsprintf_variation16.phpt
ext/standard/tests/strings/vsprintf_variation4.phpt

We also found the following test had issues on ppc64/ppc64:

ext/standard/tests/strings/vsprintf_variation15_64bit.phpt

Expected result:
----------------
These tests should not be checking for the value of the direct or indirect overflow of a float to integer conversion. The tests should have the one or two subtests that do this removed.

Actual result:
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The tests fail on some platforms, especially split 64/32-bit installations.