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/trunksystemhelpers
 
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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2008 - 2009, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter Compatibility Helpers
 *
 * This helper contains some functions based on the PEAR PHP_Compat library
 * http://pear.php.net/package/PHP_Compat
 *
 * The PEAR compat library is a little bloated and the code doesn't harmonize
 * well with CodeIgniter, so those functions have been refactored.
 * We cheat a little and use CI's _exception_handler() to output our own PHP errors
 * so that the behavior fully mimicks the PHP 5 counterparts.  -- Derek Jones
 *
 * @package        CodeIgniter
 * @subpackage    Helpers
 * @category    Helpers
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/helpers/compatibility_helper.html
 */

// ------------------------------------------------------------------------

if ( ! defined('PHP_EOL'))
{
    define('PHP_EOL', (DIRECTORY_SEPARATOR == '/') ? "\n" : "\r\n");
}

// ------------------------------------------------------------------------

/**
 * file_put_contents()
 *
 * Writes a string to a file
 * http://us.php.net/manual/en/function.file_put_contents.php
 * argument 4, $context, not supported
 *
 * @access    public
 * @param    string        file name
 * @param    mixed        data to be written
 * @param    int            flags
 * @return    int            length of written string
 */
if ( ! function_exists('file_put_contents'))
{
    function file_put_contents($filename, $data, $flags = NULL)
    {
        if (is_scalar($data))
        {
            settype($data, 'STRING');
        }

        if ( ! is_string($data) && ! is_array($data) && ! is_resource($data))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'file_put_contents(): the 2nd parameter should be either a string or an array', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        // read stream if given a stream resource
        if (is_resource($data))
        {
            if (get_resource_type($data) !== 'stream')
            {
                $backtrace = debug_backtrace();
                _exception_handler(E_USER_WARNING, 'file_put_contents(): supplied resource is not a valid stream resource', $backtrace[0]['file'], $backtrace[0]['line']);
                return FALSE;
            }

            $text = '';

            while ( ! feof($data))
            {
                $text .= fread($data, 4096);
            }

            $data = $text;
            unset($text);
        }

        // strings only please!
        if (is_array($data))
        {
            $data = implode('', $data);
        }

        // Set the appropriate mode
        if (($flags & 8) > 0) // 8 = FILE_APPEND flag
        {
            $mode = FOPEN_WRITE_CREATE;
        }
        else
        {
            $mode = FOPEN_WRITE_CREATE_DESTRUCTIVE;
        }

        // Check if we're using the include path
        if (($flags & 1) > 0) // 1 = FILE_USE_INCLUDE_PATH flag
        {
            $use_include_path = TRUE;
        }
        else
        {
            $use_include_path = FALSE;
        }

        $fp = @fopen($filename, $mode, $use_include_path);

        if ($fp === FALSE)
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'file_put_contents('.htmlentities($filename).') failed to open stream', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        if (($flags & LOCK_EX) > 0)
        {
            if ( ! flock($fp, LOCK_EX))
            {
                $backtrace = debug_backtrace();
                _exception_handler(E_USER_WARNING, 'file_put_contents('.htmlentities($filename).') unable to acquire an exclusive lock on file', $backtrace[0]['file'], $backtrace[0]['line']);
                return FALSE;
            }
        }

        // write it
        if (($written = @fwrite($fp, $data)) === FALSE)
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'file_put_contents('.htmlentities($filename).') failed to write to '.htmlentities($filename), $backtrace[0]['file'], $backtrace[0]['line']);
        }

        // Close the handle
        @fclose($fp);

        // Return length
        return $written;
    }
}

// ------------------------------------------------------------------------

/**
 * fputcsv()
 *
 * Format line as CSV and write to file pointer
 * http://us.php.net/manual/en/function.fputcsv.php
 *
 * @access    public
 * @param    resource    file pointer
 * @param    array        data to be written
 * @param    string        delimiter
 * @param    string        enclosure
 * @return    int            length of written string
 */
if ( ! function_exists('fputcsv'))
{
    function fputcsv($handle, $fields, $delimiter = ',', $enclosure = '"')
    {
        // Checking for a handle resource
        if ( ! is_resource($handle))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'fputcsv() expects parameter 1 to be stream resource, '.gettype($handle).' given', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        // OK, it is a resource, but is it a stream?
        if (get_resource_type($handle) !== 'stream')
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'fputcsv() expects parameter 1 to be stream resource, '.get_resource_type($handle).' given', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        // Checking for an array of fields
        if ( ! is_array($fields))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'fputcsv() expects parameter 2 to be array, '.gettype($fields).' given', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        // validate delimiter
        if (strlen($delimiter) > 1)
        {
            $delimiter = substr($delimiter, 0, 1);
            $backtrace = debug_backtrace();
            _exception_handler(E_NOTICE, 'fputcsv() delimiter must be one character long, "'.htmlentities($delimiter).'" used', $backtrace[0]['file'], $backtrace[0]['line']);
        }

        // validate enclosure
        if (strlen($enclosure) > 1)
        {
            $enclosure = substr($enclosure, 0, 1);
            $backtrace = debug_backtrace();
            _exception_handler(E_NOTICE, 'fputcsv() enclosure must be one character long, "'.htmlentities($enclosure).'" used', $backtrace[0]['file'], $backtrace[0]['line']);

        }

        $out = '';

        foreach ($fields as $cell)
        {
            $cell = str_replace($enclosure, $enclosure.$enclosure, $cell);

            if (strpos($cell, $delimiter) !== FALSE OR strpos($cell, $enclosure) !== FALSE OR strpos($cell, "\n") !== FALSE)
            {
                $out .= $enclosure.$cell.$enclosure.$delimiter;
            }
            else
            {
                $out .= $cell.$delimiter;
            }
        }

        $length = @fwrite($handle, substr($out, 0, -1)."\n");

        return $length;
    }
}

// ------------------------------------------------------------------------

/**
 * stripos()
 *
 * Find position of first occurrence of a case-insensitive string
 * http://us.php.net/manual/en/function.stripos.php
 *
 * @access    public
 * @param    string        haystack
 * @param    string        needle
 * @param    int            offset
 * @return    int            numeric position of the first occurrence of needle in the haystack
 */
if ( ! function_exists('stripos'))
{
    function stripos($haystack, $needle, $offset = NULL)
    {
        // Cast non string scalar values
        if (is_scalar($haystack))
        {
            settype($haystack, 'STRING');
        }

        if ( ! is_string($haystack))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'stripos() expects parameter 1 to be string, '.gettype($haystack).' given', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        if ( ! is_scalar($needle))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'stripos() needle is not a string or an integer in '.$backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        if (is_float($offset))
        {
            $offset = (int)$offset;
        }

        if ( ! is_int($offset) && ! is_bool($offset) && ! is_null($offset))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'stripos() expects parameter 3 to be long, '.gettype($offset).' given', $backtrace[0]['file'], $backtrace[0]['line']);
            return NULL;
        }

        return strpos(strtolower($haystack), strtolower($needle), $offset);
    }
}

// ------------------------------------------------------------------------

/**
 * str_ireplace()
 *
 * Find position of first occurrence of a case-insensitive string
 * http://us.php.net/manual/en/function.str-ireplace.php
 * (parameter 4, $count, is not supported as to do so in PHP 4 would make
 * it a required parameter)
 *
 * @access    public
 * @param    mixed        search
 * @param    mixed        replace
 * @param    mixed        subject
 * @return    int            numeric position of the first occurrence of needle in the haystack
 */
if ( ! function_exists('str_ireplace'))
{
    function str_ireplace($search, $replace, $subject)
    {
        // Nothing to do here
        if ($search === NULL OR $subject === NULL)
        {
            return $subject;
        }

        // Crazy arguments
        if (is_scalar($search) && is_array($replace))
        {
            $backtrace = debug_backtrace();

            if (is_object($replace))
            {
                show_error('Object of class '.get_class($replace).' could not be converted to string in '.$backtrace[0]['file'].' on line '.$backtrace[0]['line']);
            }
            else
            {
                _exception_handler(E_USER_NOTICE, 'Array to string conversion in '.$backtrace[0]['file'], $backtrace[0]['line']);
            }
        }

        // Searching for an array
        if (is_array($search))
        {
            // Replacing with an array
            if (is_array($replace))
            {
                $search = array_values($search);
                $replace = array_values($replace);

                if (count($search) >= count($replace))
                {
                    $replace = array_pad($replace, count($search), '');
                }
                else
                {
                    $replace = array_slice($replace, 0, count($search));
                }
            }
            else
            {
                // Replacing with a string all positions
                $replace = array_fill(0, count($search), $replace);
            }
        }
        else
        {
            //Searching for a string and replacing with a string.
            $search  = array((string)$search);
            $replace = array((string)$replace);
        }

        // Prepare the search array
        foreach ($search as $search_key => $search_value)
        {
            $search[$search_key] = '/'.preg_quote($search_value, '/').'/i';
        }

        // Prepare the replace array (escape backreferences)
        foreach ($replace as $k => $v)
        {
            $replace[$k] = str_replace(array(chr(92), '$'), array(chr(92).chr(92), '\$'), $v);
        }

        // do the replacement
        $result = preg_replace($search, $replace, (array)$subject);

        // Check if subject was initially a string and return it as a string
        if ( ! is_array($subject))
        {
            return current($result);
        }

        // Otherwise, just return the array
        return $result;
    }
}

// ------------------------------------------------------------------------

/**
 * http_build_query()
 *
 * Generate URL-encoded query string
 * http://us.php.net/manual/en/function.http-build-query.php
 *
 * @access    public
 * @param    array        form data
 * @param    string        numeric prefix
 * @param    string        argument separator
 * @return    string        URL-encoded string
 */
if ( ! function_exists('http_build_query'))
{
    function http_build_query($formdata, $numeric_prefix = NULL, $separator = NULL)
    {
        // Check the data
        if ( ! is_array($formdata) && ! is_object($formdata))
        {
            $backtrace = debug_backtrace();
            _exception_handler(E_USER_WARNING, 'http_build_query() Parameter 1 expected to be Array or Object. Incorrect value given', $backtrace[0]['file'], $backtrace[0]['line']);
            return FALSE;
        }

        // Cast it as array
        if (is_object($formdata))
        {
            $formdata = get_object_vars($formdata);
        }

        // If the array is empty, return NULL
        if (empty($formdata))
        {
            return NULL;
        }

        // Argument separator
        if ($separator === NULL)
        {
            $separator = ini_get('arg_separator.output');

            if (strlen($separator) == 0)
            {
                $separator = '&';
            }
        }

        // Start building the query
        $tmp = array();

        foreach ($formdata as $key => $val)
        {
            if ($val === NULL)
            {
                continue;
            }

            if (is_integer($key) && $numeric_prefix != NULL)
            {
                $key = $numeric_prefix.$key;
            }

            if (is_resource($val))
            {
                return NULL;
            }

            // hand it off to a recursive parser
            $tmp[] = _http_build_query_helper($key, $val, $separator);
        }

        return implode($separator, $tmp);
    }


    // Helper helper.  Remind anyone of college?
    // Required to handle recursion in nested arrays.
    //
    // You could shave fractions of fractions of a second by moving where
    // the urlencoding takes place, but it's much less intuitive, and if
    // your application has 10,000 form fields, well, you have other problems ;)
    function _http_build_query_helper($key, $val, $separator = '&')
    {
        if (is_scalar($val))
        {
            return urlencode($key).'='.urlencode($val);
        }
        else
        {
            // arrays please
            if (is_object($val))
            {
                $val = get_object_vars($val);
            }

            foreach ($val as $k => $v)
            {
                $tmp[] = _http_build_query_helper($key.'['.$k.']', $v, $separator);
            }
        }

        return implode($separator, $tmp);
    }
}


/* End of file compatibility_helper.php */
/* Location: ./system/helpers/compatibility_helper.php */
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