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<?php $str1 = "— lorem lorem Alice lorem lorem lorem loremlorem"; // | < Why would a dash make a difference in the the found index? $str2 = "a lorem lorem Alice lorem lorem lorem loremlorem"; $str3 = " lorem lorem Alice lorem lorem lorem loremlorem"; // The found index is always the same $foundIndex = mb_stripos($str1, "Alice"); var_dump(substr($str1, $foundIndex - 6, 24), $foundIndex); $foundIndex = mb_stripos($str2, "Alice"); var_dump(substr($str2, $foundIndex - 6, 24), $foundIndex); $foundIndex = mb_stripos($str3, "Alice"); var_dump(substr($str3, $foundIndex - 6, 24), $foundIndex);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.26, 8.1.0 - 8.1.13
string(24) "m lorem Alice lorem lore" int(14) string(24) "lorem Alice lorem lorem " int(14) string(24) "lorem Alice lorem lorem " int(14)

preferences:
141.09 ms | 409 KiB | 5 Q