src/Reader/PHP.php
public function nextkey() {
		if ( $this->keyIterPos >= $this->keyIterStop ) {
			return false;
		}
		$keyLen = $this->readInt31( $this->keyIterPos );
		$dataLen = $this->readInt31( $this->keyIterPos + 4 );
		$key = $this->read( $this->keyIterPos + 8, $keyLen );
		$this->keyIterPos += 8 + $keyLen + $dataLen;

		return $key;
	}
public function nextkey() {
		if ( $this->keyIterPos >= $this->keyIterStop ) {
			return false;
		}
		$keyLen = $this->readInt31( $this->keyIterPos );
		$dataLen = $this->readInt31( $this->keyIterPos + 4 );
		$key = $this->read( $this->keyIterPos + 8, $keyLen );
		$this->keyIterPos += 8 + $keyLen + $dataLen;

		return $key;
	}
Get the next key from the CDB file.

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