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<?php $string = 'İyi akşamlar'; $upper = mb_strtoupper($string); $lowerChars = mb_strtolower(mb_substr($string, 0, 3)); var_dump($string, $upper, $lowerChars); var_dump(grapheme_stripos($upper, $lowerChars));
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13, 8.5.1 - 8.5.3
string(14) "İyi akşamlar" string(14) "İYI AKŞAMLAR" string(5) "i̇yi" Fatal error: Uncaught Error: Call to undefined function grapheme_stripos() in /in/0431j:8 Stack trace: #0 {main} thrown in /in/0431j on line 8
Process exited with code 255.
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0
string(14) "İyi akşamlar" string(14) "İYI AKŞAMLAR" string(5) "i̇yi" int(0)
Output for 7.1.25 - 7.1.30, 7.2.0 - 7.2.33
string(14) "İyi akşamlar" string(14) "İYI AKŞAMLAR" string(3) "iyi" bool(false)
preferences:
100.44 ms | 1438 KiB | 4 Q