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<?php class Test{ const ♥ = "love"; } $class = new ReflectionClass("Test"); $constant = "♥"; if ( $class->hasConstant( $constant ) ) { $bad_char = "♥"; if ( mb_strpos( $constant, $bad_char) !== false ) { exit( "Illegal identifier: $bad_char" ); } }
Output for git.master, git.master_jit, rfc.property-hooks
Illegal identifier: ♥

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