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<?php
namespace dokuwiki\plugin\config\core;
/**
* A naive PHP file parser
*
* This parses our very simple config file in PHP format. We use this instead of simply including
* the file, because we want to keep expressions such as 24*60*60 as is.
*
* @author Chris Smith <chris@jalakai.co.uk>
*/
class ConfigParser
{
/** @var string variable to parse from the file */
protected $varname = 'conf';
/** @var string the key to mark sub arrays */
protected $keymarker = Configuration::KEYMARKER;
/**
* Parse the given PHP file into an array
*
* When the given files does not exist, this returns an empty array
*
* @param string $file
* @return array
*/
public function parse($file)
{
if (!file_exists($file)) return [];
$config = [];
$contents = @php_strip_whitespace($file);
// fallback to simply including the file #3271
if ($contents === null) {
$conf = [];
include $file;
return $conf;
}
$pattern = '/\$' . $this->varname . '\[[\'"]([^=]+)[\'"]\] ?= ?(.*?);(?=[^;]*(?:\$' . $this->varname . '|$))/s';
$matches = [];
preg_match_all($pattern, $contents, $matches, PREG_SET_ORDER);
$counter = count($matches);
for ($i = 0; $i < $counter; $i++) {
$value = $matches[$i][2];
// merge multi-dimensional array indices using the keymarker
$key = preg_replace('/.\]\[./', $this->keymarker, $matches[$i][1]);
// handle arrays
if (preg_match('/^array ?\((.*)\)/', $value, $match)) {
$arr = explode(',', $match[1]);
// remove quotes from quoted strings & unescape escaped data
$len = count($arr);
for ($j = 0; $j < $len; $j++) {
$arr[$j] = trim($arr[$j]);
$arr[$j] = $this->readValue($arr[$j]);
}
$value = $arr;
} else {
$value = $this->readValue($value);
}
$config[$key] = $value;
}
return $config;
}
/**
* Convert php string into value
*
* @param string $value
* @return bool|string
*/
protected function readValue($value)
{
$removequotes_pattern = '/^(\'|")(.*)(?<!\\\\)\1$/s';
$unescape_pairs = [
'\\\\' => '\\',
'\\\'' => '\'',
'\\"' => '"'
];
if ($value == 'true') {
$value = true;
} elseif ($value == 'false') {
$value = false;
} else {
// remove quotes from quoted strings & unescape escaped data
$value = preg_replace($removequotes_pattern, '$2', $value);
$value = strtr($value, $unescape_pairs);
}
return $value;
}
}
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