@ 2019-06-23T15:42:53Z <?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));
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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 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.7 string(14) "İyi akşamlar"
string(14) "İYI AKŞAMLAR"
string(5) "i̇yi"
int(0)
Output for 7.3.32 - 7.3.33 , 7.4.33 , 8.0.13 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 7.1.25 - 7.1.30 , 7.2.0 - 7.2.33 string(14) "İyi akşamlar"
string(14) "İYI AKŞAMLAR"
string(3) "iyi"
bool(false)
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178.15 ms | 402 KiB | 169 Q