3v4l.org

run code in 300+ PHP versions simultaneously
<?php $utf8string = 'ASCIIユーティーエッフček等々'; $var = 'Ček'; $pos = strpos($utf8string, $var); if ($pos!==false) { echo substr($utf8string, 0, $pos); }

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58.33 ms | 402 KiB | 5 Q