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<?php var_dump(mb_strpos('ABC-ÖÄÜ-💩-' . "\xc3\x28" . '中文空白-中文空白' . "\xf0\x28\x8c\x28" . 'abc', '白', -8));
Output for git.master, git.master_jit, rfc.property-hooks
int(20)

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