3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = "Hello 🤖"; $chop = substr($test, 0, 8); //Doh! This will crash almost all multibyte aware functions... $json = json_encode($chop); var_dump(json_last_error_msg(), $json);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(56) "Malformed UTF-8 characters, possibly incorrectly encoded" bool(false)

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171.67 ms | 403 KiB | 183 Q