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   1  <?php
   2  
   3  namespace dokuwiki\plugin\config\core;
   4  
   5  /**
   6   * A naive PHP file parser
   7   *
   8   * This parses our very simple config file in PHP format. We use this instead of simply including
   9   * the file, because we want to keep expressions such as 24*60*60 as is.
  10   *
  11   * @author  Chris Smith <chris@jalakai.co.uk>
  12   */
  13  class ConfigParser {
  14      /** @var string variable to parse from the file */
  15      protected $varname = 'conf';
  16      /** @var string the key to mark sub arrays */
  17      protected $keymarker = Configuration::KEYMARKER;
  18  
  19      /**
  20       * Parse the given PHP file into an array
  21       *
  22       * When the given files does not exist, this returns an empty array
  23       *
  24       * @param string $file
  25       * @return array
  26       */
  27      public function parse($file) {
  28          if(!file_exists($file)) return array();
  29  
  30          $config = array();
  31          $contents = @php_strip_whitespace($file);
  32  
  33          // fallback to simply including the file #3271
  34          if($contents === null) {
  35              $conf = [];
  36              include $file;
  37              return $conf;
  38          }
  39  
  40          $pattern = '/\$' . $this->varname . '\[[\'"]([^=]+)[\'"]\] ?= ?(.*?);(?=[^;]*(?:\$' . $this->varname . '|$))/s';
  41          $matches = array();
  42          preg_match_all($pattern, $contents, $matches, PREG_SET_ORDER);
  43  
  44          for($i = 0; $i < count($matches); $i++) {
  45              $value = $matches[$i][2];
  46  
  47              // merge multi-dimensional array indices using the keymarker
  48              $key = preg_replace('/.\]\[./', $this->keymarker, $matches[$i][1]);
  49  
  50              // handle arrays
  51              if(preg_match('/^array ?\((.*)\)/', $value, $match)) {
  52                  $arr = explode(',', $match[1]);
  53  
  54                  // remove quotes from quoted strings & unescape escaped data
  55                  $len = count($arr);
  56                  for($j = 0; $j < $len; $j++) {
  57                      $arr[$j] = trim($arr[$j]);
  58                      $arr[$j] = $this->readValue($arr[$j]);
  59                  }
  60  
  61                  $value = $arr;
  62              } else {
  63                  $value = $this->readValue($value);
  64              }
  65  
  66              $config[$key] = $value;
  67          }
  68  
  69          return $config;
  70      }
  71  
  72      /**
  73       * Convert php string into value
  74       *
  75       * @param string $value
  76       * @return bool|string
  77       */
  78      protected function readValue($value) {
  79          $removequotes_pattern = '/^(\'|")(.*)(?<!\\\\)\1$/s';
  80          $unescape_pairs = array(
  81              '\\\\' => '\\',
  82              '\\\'' => '\'',
  83              '\\"' => '"'
  84          );
  85  
  86          if($value == 'true') {
  87              $value = true;
  88          } elseif($value == 'false') {
  89              $value = false;
  90          } else {
  91              // remove quotes from quoted strings & unescape escaped data
  92              $value = preg_replace($removequotes_pattern, '$2', $value);
  93              $value = strtr($value, $unescape_pairs);
  94          }
  95          return $value;
  96      }
  97  
  98  }