56 	public $variables = array();  variable in EvalMath
149 		$this->variables['pi'] = pi();
150 		$this->variables['e'] = exp( 1 );
190 			$this->variables[ $matches[1] ] = $tmp;
216 					if ( array_key_exists( $token, $this->variables ) ) {
217 						$stack[ $i ] = $this->variables[ $token ];
239 	public function variables() {  function in EvalMath
240 		return $this->variables;
497 	 * @param array       $variables Optional. [description].
500 	protected function pfx( $tokens, array $variables = array() ) {  argument
626 				} elseif ( array_key_exists( $token, $this->variables ) ) {
627 					$stack->push( $this->variables[ $token ] );
628 				} elseif ( array_key_exists( $token, $variables ) ) {
629 					$stack->push( $variables[ $token ] );