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<?php class Test{ const AB♥ = "alphabet"; } $rc = new ReflectionClass("Test"); $t = array_keys( $rc->getConstants())[0]; if ( mb_substr($t,-1,1,"utf-8") == "\xe2\x99\xa5" ) { var_dump($t,mb_substr($t,-1,1,"utf-8"), "\xe2\x99\xa5"); echo "heart: ",json_decode('"' . "\u2665" . '"'); //trigger_error("heart symbol is disallowed",E_USER_ERROR); }
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