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<?php declare(strict_types=1); class CanBeStrung { public function __toString(): string { return 'I\'m highly strung'; } } function isItStringy($possibleStringType): bool { if (is_string($possibleStringType)) { return true; } if(is_callable([$possibleStringType, '__toString'])) { return true; } return false; } assert(isItStringy('a string') === true); assert(isItStringy(new CanBeStrung()) === true); assert(isItStringy(42) === false); assert(isItStringy(new stdClass()) === false);
Output for 7.2.0 - 7.2.34, 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
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

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111.36 ms | 402 KiB | 193 Q