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Programming PHP, 3rd Edition by Peter MacIntyre, Kevin Tatroe, Rasmus Lerdorf

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Name

trait_exists

Synopsis

bool trait_exists(string name[, bool autoload])

Returns true if a trait with the same name as the string has been defined; if not, it returns false. The comparison for trait names is case-insensitive. If autoload is set and is true, the autoloader attempts to load the trait before checking its existence.

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