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<?php $names = [ 'Pérez-González', 'Domínguez-Díaz', 'Güemez-Martínez', 'Johnson-De Sosa', 'Pérez-De la Cruz', 'smith', 'Pérez De la Cruz-González', 'de Gal-O\'Connell', 'Johnson--Johnson' ]; foreach ($names as $name) { echo "$name is " . (!preg_match("~^\pL+(?:[- ']\pL+)*$~u", $name) ? 'in' : '') . "valid\n"; }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
Pérez-González is valid Domínguez-Díaz is valid Güemez-Martínez is valid Johnson-De Sosa is valid Pérez-De la Cruz is valid smith is valid Pérez De la Cruz-González is valid de Gal-O'Connell is valid Johnson--Johnson is invalid
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 Pérez-González is valid Domínguez-Díaz is valid Güemez-Martínez is valid Johnson-De Sosa is valid Pérez-De la Cruz is valid smith is valid Pérez De la Cruz-González is valid de Gal-O'Connell is valid Johnson--Johnson is invalid
Output for 4.3.11
Parse error: parse error, unexpected '[' in /in/auqSK on line 3
Process exited with code 255.
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156.72 ms | 409 KiB | 5 Q