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<?php $str = "\xC2\xA1Hola!"; preg_match('/H/u', $str, $a_matches, PREG_OFFSET_CAPTURE); echo $str, mb_strlen(substr($str, 0, $a_matches[0][1]));
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
¡Hola!1
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 ¡Hola!1
Output for 5.5.24 - 5.5.35
¡Hola!2
preferences:
150.43 ms | 401 KiB | 211 Q