code: public function getLicenseByIdentifier($identifier)
      {
          $key = strtolower($identifier);
  
          if (!isset($this->licenses[$key])) {
              return;
          }
  
          list($identifier, $name, $isOsiApproved, $isDeprecatedLicenseId) = $this->licenses[$key];
  
          return array(
              $name,
              $isOsiApproved,
              'https://spdx.org/licenses/' . $identifier . '.html#licenseText',
              $isDeprecatedLicenseId,
          );
      }
docs: Returns license metadata by license identifier.
  
  This function adds a link to the full license text to the license metadata.
  The array returned is in the form of:
  
  [ 0 => full name (string), 1 => osi certified, 2 => link to license text (string), 3 => deprecation status (bool) ]
  
  @param string $identifier
  
  @return array|null