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<?php /** * The Forminator_Calculator_Symbol_Abstract class. * * @package Forminator */ /** * Class Forminator_Calculator_Symbol_Abstract */ abstract class Forminator_Calculator_Symbol_Abstract { /** * Array with the 1-n (exception: the Numbers class may have 0) * unique identifiers (the textual representation of a symbol) * of the symbol. Example: ['/', ':'] * Attention: The identifiers are case-sensitive, however, * valid identifiers in a term are always written in lower-case. * Therefore identifiers always have to be written in lower-case! * * @var string[] */ protected $identifiers = array(); /** * Getter for the identifiers of the symbol. * Attention: The identifiers will be lower-cased! * * @return string[] */ final public function get_identifiers() { // Lower-case all identifiers to make it easier to find duplicate identifiers. $identifiers = array_map( 'strtolower', $this->identifiers ); return $identifiers; } }

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