src/Reader/PHP.php
public function firstkey() {
		$this->keyIterPos = 4;

		if ( !$this->keyIterStop ) {
			$pos = INF;
			for ( $i = 0; $i < 2048; $i += 8 ) {
				$pos = min( $this->readInt31( $i ), $pos );
			}
			$this->keyIterStop = $pos;
		}

		$this->keyIterPos = 2048;
		return $this->nextkey();
	}
public function firstkey() {
		$this->keyIterPos = 4;

		if ( !$this->keyIterStop ) {
			$pos = INF;
			for ( $i = 0; $i < 2048; $i += 8 ) {
				$pos = min( $this->readInt31( $i ), $pos );
			}
			$this->keyIterStop = $pos;
		}

		$this->keyIterPos = 2048;
		return $this->nextkey();
	}
Get the first key from the CDB file and reset the key iterator.

@return string|bool Key, or false if no keys in file.