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   1  <?php
   2  /**
   3   * WordPress implementation for PHP functions missing from older PHP versions.
   4   *
   5   * @package PHP
   6   * @access private
   7   */
   8  
   9  // Added in PHP 5.0
  10  
  11  if (!function_exists('http_build_query')) {
  12  	function http_build_query($data, $prefix=null, $sep=null) {
  13          return _http_build_query($data, $prefix, $sep);
  14      }
  15  }
  16  
  17  // from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
  18  function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
  19      $ret = array();
  20  
  21      foreach ( (array) $data as $k => $v ) {
  22          if ( $urlencode)
  23              $k = urlencode($k);
  24          if ( is_int($k) && $prefix != null )
  25              $k = $prefix.$k;
  26          if ( !empty($key) )
  27              $k = $key . '%5B' . $k . '%5D';
  28          if ( $v === NULL )
  29              continue;
  30          elseif ( $v === FALSE )
  31              $v = '0';
  32  
  33          if ( is_array($v) || is_object($v) )
  34              array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
  35          elseif ( $urlencode )
  36              array_push($ret, $k.'='.urlencode($v));
  37          else
  38              array_push($ret, $k.'='.$v);
  39      }
  40  
  41      if ( NULL === $sep )
  42          $sep = ini_get('arg_separator.output');
  43  
  44      return implode($sep, $ret);
  45  }
  46  
  47  if ( !function_exists('_') ) {
  48      function _($string) {
  49          return $string;
  50      }
  51  }
  52  
  53  if (!function_exists('stripos')) {
  54  	function stripos($haystack, $needle, $offset = 0) {
  55          return strpos(strtolower($haystack), strtolower($needle), $offset);
  56      }
  57  }
  58  
  59  if ( ! function_exists('hash_hmac') ):
  60  function hash_hmac($algo, $data, $key, $raw_output = false) {
  61      $packs = array('md5' => 'H32', 'sha1' => 'H40');
  62  
  63      if ( !isset($packs[$algo]) )
  64          return false;
  65  
  66      $pack = $packs[$algo];
  67  
  68      if (strlen($key) > 64)
  69          $key = pack($pack, $algo($key));
  70      else if (strlen($key) < 64)
  71          $key = str_pad($key, 64, chr(0));
  72  
  73      $ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));
  74      $opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));
  75  
  76      return $algo($opad . pack($pack, $algo($ipad . $data)));
  77  }
  78  endif;
  79  
  80  if ( ! function_exists('mb_strcut') ):
  81  	function mb_strcut( $str, $start, $length=null, $encoding=null ) {
  82          return _mb_strcut($str, $start, $length, $encoding);
  83      }
  84  endif;
  85  
  86  function _mb_strcut( $str, $start, $length=null, $encoding=null ) {
  87      // the solution below, works only for utf-8, so in case of a different
  88      // charset, just use built-in substr
  89      $charset = get_option( 'blog_charset' );
  90      if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
  91          return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
  92      }
  93      // use the regex unicode support to separate the UTF-8 characters into an array
  94      preg_match_all( '/./us', $str, $match );
  95      $chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
  96      return implode( '', $chars );
  97  }
  98  
  99  if ( !function_exists( 'htmlspecialchars_decode' ) ) {
 100      // Added in PHP 5.1.0
 101      // Error checks from PEAR::PHP_Compat
 102  	function htmlspecialchars_decode( $str, $quote_style = ENT_COMPAT )
 103      {
 104          if ( !is_scalar( $string ) ) {
 105              trigger_error( 'htmlspecialchars_decode() expects parameter 1 to be string, ' . gettype( $string ) . ' given', E_USER_WARNING );
 106              return;
 107          }
 108  
 109          if ( !is_int( $quote_style ) && $quote_style !== null ) {
 110              trigger_error( 'htmlspecialchars_decode() expects parameter 2 to be integer, ' . gettype( $quote_style ) . ' given', E_USER_WARNING );
 111              return;
 112          }
 113  
 114          return wp_specialchars_decode( $str, $quote_style );
 115      }
 116  }
 117  
 118  ?>