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/lib/plugins/config/core/ -> ConfigParser.php (source)

   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          $pattern = '/\$' . $this->varname . '\[[\'"]([^=]+)[\'"]\] ?= ?(.*?);(?=[^;]*(?:\$' . $this->varname . '|$))/s';
  33          $matches = array();
  34          preg_match_all($pattern, $contents, $matches, PREG_SET_ORDER);
  35  
  36          for($i = 0; $i < count($matches); $i++) {
  37              $value = $matches[$i][2];
  38  
  39              // merge multi-dimensional array indices using the keymarker
  40              $key = preg_replace('/.\]\[./', $this->keymarker, $matches[$i][1]);
  41  
  42              // handle arrays
  43              if(preg_match('/^array ?\((.*)\)/', $value, $match)) {
  44                  $arr = explode(',', $match[1]);
  45  
  46                  // remove quotes from quoted strings & unescape escaped data
  47                  $len = count($arr);
  48                  for($j = 0; $j < $len; $j++) {
  49                      $arr[$j] = trim($arr[$j]);
  50                      $arr[$j] = $this->readValue($arr[$j]);
  51                  }
  52  
  53                  $value = $arr;
  54              } else {
  55                  $value = $this->readValue($value);
  56              }
  57  
  58              $config[$key] = $value;
  59          }
  60  
  61          return $config;
  62      }
  63  
  64      /**
  65       * Convert php string into value
  66       *
  67       * @param string $value
  68       * @return bool|string
  69       */
  70      protected function readValue($value) {
  71          $removequotes_pattern = '/^(\'|")(.*)(?<!\\\\)\1$/s';
  72          $unescape_pairs = array(
  73              '\\\\' => '\\',
  74              '\\\'' => '\'',
  75              '\\"' => '"'
  76          );
  77  
  78          if($value == 'true') {
  79              $value = true;
  80          } elseif($value == 'false') {
  81              $value = false;
  82          } else {
  83              // remove quotes from quoted strings & unescape escaped data
  84              $value = preg_replace($removequotes_pattern, '$2', $value);
  85              $value = strtr($value, $unescape_pairs);
  86          }
  87          return $value;
  88      }
  89  
  90  }