statische-string-functies-php-compacten

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voorbeeld.xml

Code (php)
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<?xml version="1.0"?>

<voorbeeld>
        
    <item>Text</item>
    <![CDATA[
        <a href="text">Testing href</a>
    
    ]]>
    <item>Text</item>
    <!-- Comment -->
</voorbeeld>


voorbeeld.php
Code (php)
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<?
include('STATIC_STRING.class.php');
$data = file_get_contents('voorbeeld.xml');

header("Content-type: text/html");

echo "Originele data:<br />";
echo $data;
echo "<br /><hr /><br />";

// Converteer cdata
$data = STATIC_STRING::convert_by_tag($data, '<![CDATA[', ']]>', 'HTMLENTITIES', true);

echo "Geconverteerd cdata:<br />";
echo $data;
echo "<br /><hr /><br />";


// Verwijder comment
$data = STATIC_STRING::convert_by_tag($data, '<!--', '-->', 'STRIP', true);

echo "Zonder commentaar:<br />";
echo $data;
echo "<br /><hr /><br />";

// Verkrijg tags
$arrMatch = array();
STATIC_STRING::match_by_tag($data, '<', '>', $arrMatch);

echo "Gevonden elementen:<br />";
foreach($arrMatch as $positionData)
{

    // Zonder open tag, dus positie + 1, index 3 is binnenlengte
    echo substr($data, $positionData[0]+1, $positionData[3])."<br />";
}

echo "<br /><hr /><br />";


echo "voorbeeld.php compressie:<br />";

$data = file_get_contents('voorbeeld.php');
echo "Huidige lengte: ".strlen($data)."<br />";

// Compact phpcode
$data = STATIC_STRING::compact_php($data);

echo "Compressie lengte: ".strlen($data)."<br /><hr/>";
echo "Compressie code:<br />".htmlentities($data);
echo "<br /><hr /><br />";

echo "STATIC_STRING.class.php compressie:<br />";

$data = file_get_contents('STATIC_STRING.class.php');
echo "Huidige lengte: ".strlen($data)."<br />";

// Compact phpcode
$data = STATIC_STRING::compact_php($data);

echo "Compressie lengte: ".strlen($data)."<br /><hr/>";
echo "Compressie code:<br />".htmlentities($data);
echo "<br /><hr /><br />";
?>



STATIC_STRING.class.php
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<?

class STATIC_STRING
{
    /**
     * Returns the start and endpostion of each matched set. Array(Array(iStartpos, iEndPos, $iTotalLength, $iInternalLength), Array(iStartpos, iEndpos, $iTotalLength, $iInternalLength))
     *
     * @param string $strText
     * @param string $strTagOpen
     * @param string $strTagClose
     * @param array $arrMatch
     */

    function match_by_tag($strText, $strTagOpen, $strTagClose, &$arrMatch, $iOffset = 0, $iLimit = null)
    {

        $iCount = 0;
        $iStartPos = 0;
        $iCurrentPos = $iOffset;

        // Determine the length of both tags
        $iTagOpenLength = strlen($strTagOpen);
        $iTagCloseLength = strlen($strTagClose);

        // Walk through the text, using the substr function, to find the first occurance
        // Save the first occurance position in the iStartpos
        // If the currentposition is outside the textrange, the loop will quit

        while ($iCurrentPos < strlen($strText)
                && (
$iStartPos = strpos($strText, $strTagOpen, $iCurrentPos)) !== false
                && ($iLimit == null || $iCount < $iLimit) )
        {

            // Update the current pos, set it to the startposition plus the length of the startstring
            $iCurrentPos = $iStartPos + $iTagOpenLength;

            // Try to match the endstring, if not successful, match it to the end of the text
            $iEndPos = strpos($strText, $strTagClose, $iCurrentPos);
            if ($iEndPos === false) $iEndPos = strlen($strText);

            // Update the current position
            $iCurrentPos = $iEndPos + $iTagCloseLength;

            $arrMatch[] = array($iStartPos, $iCurrentPos,
                            $iCurrentPos - $iStartPos, // Total length
                            $iCurrentPos - $iStartPos - $iTagOpenLength - $iTagCloseLength); // Internal length
            $iCount++;
        }
    }


    /**
     * Convert a string matched by an open and close tag.
     *
     * @param string $strText
     * @param string $strTagOpen
     * @param string $strTagClose
     * @param string $strAction = Strip, HTMLENTITIES, HTML_ENTITY_DECODE
     * @return string
     */

    function convert_by_tag($strText, $strTagOpen, $strTagClose, $strAction, $blnRemoveTag = true, $iOffset = 0, $iLimit = null)
    {

        $iTagOpenLength = strlen($strTagOpen);
        $iTagCloseLength = strlen($strTagClose);

        $strConverted = "";

        // Use the STATIC_STRING::match_by_tag function
        $arrMatches = array();
        STATIC_STRING::match_by_tag($strText, $strTagOpen,  $strTagClose, $arrMatches, $iOffset, $iLimit);

        // Check if there where any matches, else return the input text
        if(count($arrMatches) > 0)
        {

            // Use the current pos variable to cache the current position in the string
            $iCurrentPos = 0;

            // Walk through the matches
            foreach($arrMatches as $arrPositions)
            {

                if($blnRemoveTag)
                {

                    // Without the tags
                    //  the current position till the occurance of the open string (length = openstringpos - currentpos)
                    //   the opentag is thus removed

                    $strConverted .= substr($strText, $iCurrentPos, $arrPositions[0] - $iCurrentPos);
                }

                elseif($iCurrentPos == 0)
                {

                    // Do nothing special
                    $strConverted .= substr($strText, 0, $arrPositions[0] + $iTagOpenLength);
                }

                else
                {
                    // Go back the length of the closing char(cannot when iCurrentpos = 0), to keep it in the converted string
                    // The length is the openstringpos - currentpos + openstringlength + closestringlength

                    $strConverted .= substr($strText,
                                            $iCurrentPos - $iTagCloseLength,
                                            $arrPositions[0] - $iCurrentPos + $iTagCloseLength + $iTagOpenLength);
                }


                $strMatch = substr($strText, $arrPositions[0] + $iTagOpenLength, $arrPositions[3]);

                switch(strtoupper($strAction))
                {
                    case
'STRIP':
                        break;
                    case
'HTMLENTITIES':
                        $strConverted .= htmlentities($strMatch);
                        break;
                    case
'HTML_ENTITY_DECODE':
                        $strConverted .= html_entity_decode($strMatch);
                        break;
                }


                // The currentpos will be updated to the position after the closetag
                // thus: startpos + length

                $iCurrentPos = $arrPositions[0] + $arrPositions[2];
            }


            // Put the text behind
            if($blnRemoveTag)
            {

                $strConverted .= substr($strText, $iCurrentPos);
            }

            else  
            {
                $strConverted .= substr($strText, $iCurrentPos - $iTagCloseLength);
            }
        }

        else {
            $strConverted = $strText;
        }


        return $strConverted;
    }


    /**
     * Strip a match out of string. Save the match in a referenced array and return the stripped text
     * The unique tags can be replaced again by InsertMatchedTagsFromArray
     *
     * @param string $strText
     * @param string reference $arrData
     * @param string $strTagOpen
     * @param string $strTagClose
     * @return strText stripped of the tags, replaced with unique tags.
     */

    function strip_out_and_save_by_tag($strText, &$arrData, $strTagOpen, $strTagClose, $iOffset = 0, $iLimit = null)
    {

        $arrMatch = array();
        
        STATIC_STRING::match_by_tag($strText, $strTagOpen, $strTagClose, $arrMatch, $iOffset, $iLimit);
        
        if($arrMatch > 0)
        {

            // Save the new string in here
            $iPos = 0;
            $strStrippedText = "";
            
            foreach($arrMatch as $stringPos)
            {

                // Join the new output and the oldstring, to generate an absolute unique tag
                $strUniqueTag = STATIC_STRING::generate_unique_tag($strText, $arrData);
                
                // Save the data outside the tags
                $strStrippedText .= substr($strText, $iPos, $stringPos[0] - $iPos);
                
                // Add the unique tag, this is at the location of the match
                $strStrippedText .= $strUniqueTag;
                // Save the match into the array
                $arrData[$strUniqueTag] = substr($strText, $stringPos[0], $stringPos[2]);
                
                // Set the position at the end of the match
                $iPos = $stringPos[1];
            }

            // After all, match the text after the last tag
            $strStrippedText .= substr($strText, $iPos);
            
            $strText = $strStrippedText;
        }

        
        return $strText;
    }

    
    /**
     * Replace matched tags by their values. Undo's the strip_out_and_save_by_tag function
     *
     * @param string $strText
     * @param array $arrMatchedTags
     * @return strText
     */

    function insert_saved_by_tag($strText, $arrMatchedTags)
    {

        foreach($arrMatchedTags as $key=>$value)
        {

            $strText = str_replace($key, $value, $strText);
        }

        
        return $strText;
    }

    
    /**
     * Get the first position of a set of strings.
     *
     * @param string $strText
     * @param mixeld $arrSearch
     * @param int $iOffset
     * @return array($iPosition, $strNeedle)
     */

    function first_position($strText, $arrSearch, $iOffset = null)
    {

        $iPosition     = false;
        $strNeedle    = '';
        
        // Convert a single node into the array.
        if(!is_array($arrSearch)) $arrSearch = array($arrSearch);
        
        foreach($arrSearch as $Needle)
        {

            $iTMP = strpos($strText, $Needle, $iOffset);
            if($iTMP !== false && ( $iTMP < $iPosition || $iPosition === false))
            {

                $iPosition     = $iTMP;
                $strNeedle    = $Needle;
            }
        }


        return array($iPosition, $strNeedle);
    }

    
    /**
     * Get the last position of a set of strings.
     *
     * @param string $strText
     * @param mixeld $arrSearch
     * @return array($iPosition, $strNeedle)
     */

    function last_position($strText, $arrSearch)
    {

        $iPosition     = false;
        $strNeedle    = '';
        
        // Convert a single node into the array.
        if(!is_array($arrSearch)) $arrSearch = array($arrSearch);
        
        foreach($arrSearch as $Needle)
        {

            $iTMP = strpos($strText, $Needle);
            if($iTMP !== false && ( $iTMP > $iPosition || $iPosition == false))
            {

                $iPosition     = $iTMP;
                $strNeedle     = $Needle;
            }
        }


        return array($iPosition, $strNeedle);
    }

    
    /**
     * This function strips php code, it removes comments, tabs and newlines. It leaves string intact, so newlines in your strings won't be replaced.
     *
     * @param string $strText
     * @return string stripped from comments
     */

    function compact_php($strText)
    {

        // Don't do anything when a file already contains some of those tags. It would messup the whole thing
        /// Do that by finding the first postion of one of the tags. If it returns false, it doesn't contain any of them

        $strCompressString = '<? /** Compressed with PHPCodeCompacter **/ ?>';
        $iPrefPos = strpos($strText, $strCompressString);
        if($strText != '' &&  ($iPrefPos > 0 || $iPrefPos === false))
        {

            $arr = array();
            $arr['ESCESC']     = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arr['ESCSNG']     = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arr['ESCDBL']     = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arr['SNG']     = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arr['DBL']     = STATIC_STRING::generate_unique_tag($strText, $arr);
            
            
            // Replace escaped escapes
            $strText = str_replace('\\\\', $arr['ESCESC'], $strText);
            // Replace escaped quotes
            $strText = str_replace(array('\\\'', '\\"'), array($arr['ESCSNG'], $arr['ESCDBL']), $strText);
            
            $arrQuoted = array();
            
            // It is difficult to strip all out in the right way
            //  the most precise manner is by walking through the text and see what comes first
            //  there is comment, what has to be stripped and strings which have to be remove and store

            do
            {
                $arrFirstCharData = STATIC_STRING::first_position($strText, array('//', '/*', '#', "'", '"'));
                $iStrPos     = $arrFirstCharData[0];
                $strNeedle     = $arrFirstCharData[1];
                
                if($iStrPos !== false && $strNeedle == '//')
                {

                    // It is comment, so strip out comment first
                    $strText = STATIC_STRING::convert_by_tag($strText, '//', "\n", 'strip', true, 0, 1);
                }
elseif($iStrPos !== false && $strNeedle == '/*')
                {

                    // It is comment, so strip out comment first
                    $strText = STATIC_STRING::convert_by_tag($strText, '/*', "*/", 'strip', true, 0, 1 );
                }

                elseif($iStrPos !== false && $strNeedle == '"')
                {

                    // It isn't comment, so it should be a tag for a single or double quote
                    //  Replace the damn quotes!

                    $strText = substr_replace($strText, $arr['DBL'], $iStrPos, 1);
                    
                    // Determine the position of the closing quote after the replace
                    $iNextQuote = strpos($strText, '"');
                    $strText = substr_replace($strText, $arr['DBL'], $iNextQuote, 1);
                    $strText = STATIC_STRING::strip_out_and_save_by_tag($strText, $arrQuoted, $arr['DBL'], $arr['DBL'], 0, 1);
                }
elseif($iStrPos !== false && $strNeedle == "'")
                {

                    $strText = substr_replace($strText, $arr['SNG'], $iStrPos, 1);
                    
                    // Determine the position of the closing quote after the replace
                    $iNextQuote = strpos($strText, "'");
                    $strText = substr_replace($strText, $arr['SNG'], $iNextQuote, 1);
                    $strText = STATIC_STRING::strip_out_and_save_by_tag($strText, $arrQuoted, $arr['SNG'], $arr['SNG'], 0, 1);
                    echo '';
                }
elseif($iStrPos !== false && $strNeedle == '#')
                {

                    // It is comment, so strip out comment first
                    $strText = STATIC_STRING::convert_by_tag($strText, '#', "\n", 'strip', true, 0, 1);
                }
                
            }
while($iStrPos);
            
            // The core removal
            
            // remove whitespace

            $strText = preg_replace('/\s\s+/', ' ', $strText);
            
            $strText = str_replace(" class ", "\r\nclass ", $strText);
            $strText = STATIC_STRING::insert_saved_by_tag($strText, $arrQuoted);
            
            // Undo the escaping in shifted order
            $strText = str_replace(array($arr['SNG'], $arr['DBL']), array('\'', '"'), $strText);
            $strText = str_replace(array($arr['ESCSNG'], $arr['ESCDBL']), array('\\\'', '\\"'), $strText);
            $strText = str_replace($arr['ESCESC'], '\\\\', $strText);
            
            
            $strText = str_replace('?><?', '', $strCompressString.$strText);
            
            return $strText;
        }

        
        return trim($strText);
    }

    
    /**
     * This function strips php code, it removes comments, tabs and newlines. It leaves strings intact, so newlines in your strings won't be replaced.
     *
     * @param string $strText
     * @return string stripped from comments
     */

    function compact_xml($strText)
    {

        // Don't do anything when a file already contains some of those tags. It would messup the whole thing
        /// Do that by finding the first postion of one of the tags. If it returns false, it doesn't contain any of them

        $strCompressString = '<!-- /** Compressed with PHPCodeCompacter **/ -->';
        $iPrefPos = strpos($strText, $strCompressString);
        if($strText != '' &&  ($iPrefPos > 0 || $iPrefPos === false))
        {

            $arr = array();
            $arr['SAFEDAT_OPEN'] = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arr['SAFEDAT_CLOSE'] = STATIC_STRING::generate_unique_tag($strText, $arr);
            $arrSafe = array();
            
            // It is difficult to strip all out in the right way
            //  the most precise manner is by walking through the text and see what comes first
            //  there is comment, what has to be stripped and strings which have to be remove and store

            do
            {
                $arrFirstPosData = STATIC_STRING::first_position($strText, array('<![CDATA[', '<!--'));
                $iStrPos     = $arrFirstPosData[0];
                $strNeedle     = $arrFirstPosData[1];
                
                if($iStrPos && $strNeedle == '<![CDATA[')
                {

                    // It is cdata, save the data in the save array
                    $strText = substr_replace($strText, $arr['SAFEDAT_OPEN'], $iStrPos, 9);
                    
                    // Determine the position of the closing quote after the replace
                    $iSafedatClose = strpos($strText, ']]>');
                    $strText = substr_replace($strText, $arr['SAFEDAT_CLOSE'], $iSafedatClose, 3);
                    $strText = STATIC_STRING::strip_out_and_save_by_tag($strText, $arrSafe, $arr['SAFEDAT_OPEN'], $arr['SAFEDAT_CLOSE'], 0, 1);
                }
elseif($iStrPos && $strNeedle == '<!--')
                {

                    // It is comment, so strip out comment first
                    $strText = STATIC_STRING::convert_by_tag($strText, '<!--', "-->", 'strip', true, 0, 1 );
                }
                
            }
while($iStrPos);
            
            // The core removal
            $strText = str_replace(array("\r\n", "\n", "\t", ' ', '   ', '    ', '     '), ' ', $strText);
            
            $strText = STATIC_STRING::insert_saved_by_tag($strText, $arrSafe);
            
            // Undo the escaping in shifted order
            $strText = str_replace(array($arr['SAFEDAT_OPEN'], $arr['SAFEDAT_CLOSE']), array('<![CDATA[', ']]>'), $strText);
            
            $strText = $strText.$strCompressString;
        }

        
        return trim($strText);
    }

    
    /**
     * When you want to generate an unique tag that isn't in a string or in a array
     *
     * @param string $TextUnique
     * @param array $ArrayUnique
     * @return Unique Tag
     */

    function generate_unique_tag($TextUnique = null, $ArrayUnique = null)
    {

        $strTag = "";
        $iTagLength = 5;
        do{
            $strTag = '['.substr(md5(rand(0,10000).date("I-Y-sM:y:m")), 0, $iTagLength).']';
            $iTagLength++;
        }
while( (isset($TextUnique) && strstr($TextUnique, $strTag))
                    || (
isset($ArrayUnique) && (array_search($strTag, $ArrayUnique) || isset($ArrayUnique[$strTag]))));
        
        return $strTag;
    }
}


?>

 
 

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