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Object of class could not be converted to string: How do I fix this?

Posted on 2008-06-23
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Last Modified: 2008-06-23
I do not understand this PHP error:

Catchable fatal error: Object of class JavaScriptPacker could not be converted to string on line 825

I use PHP5
<?php
 

/* Perform ROT13 encoding on a string */ 

function iScramble_rot13($str) 

{ 

    $from = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; 

    $to = 'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'; 

  

    return strtr($str, $from, $to); 

  

} 

  

/* Perform the equivalent of the Javascript escape function */ 

function iScramble_escape($plain) 

{ 

    $escaped = ""; 

    $passChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789*@-_+./"; 

  

    for ($i = 0; $i < strlen($plain); $i++) 

    { 

        $char = $plain{$i}; 

        if (strpos($passChars, $char) === false) 

        { 

            // $char is not in the list of $passChars. Encode in hex format 

            $escaped .= sprintf("%%%02X", ord($char)); 

        } 

        else 

        { 

            $escaped .= $char; 

        } 

    } 

  

    return $escaped; 

} 

  

/* Main iScramble function 

 * 

 * This function takes plain text and scrambles them. It returns some Javascript 

 * that contains the scrambled text and Javascript to unscramble it. 

 * 

 * RETURNS:     Javascript code to display the scrambled message. 

 * 

 * PARAMETERS: 

 * 

 *  NAME        TYPE 

 * 

 *  $plain      String      Plan text to scramble 

 *  $longPwd    Boolean     True for better scrambling, using a longer password. 

 *                          This produces larger Javascript code. 

 *                          Defaults to False. 

 *  $rot13      Boolean     True for better scrambling, using rot13 encoding of 

 *                          the plain text. This produces larger Javascript 

 *                          code and takes longer to decode. Not recommended 

 *                          for large $plain strings. 

 *                          Defaults to False. 

 *  $sorry      String      Message displayed if visitor does not have 

 *                          Javascript enabled in their web browser. 

 *                          Defaults to "<I>[Please Enable Javascript]</I>". 

 */ 

function iScramble($plain, $longPwd=False, $rot13=True, $sorry="<strong>Please Enable Javascript</strong>") 

{  

  

    $escaped = iScramble_escape($plain); 

    if ($rot13) 

    { 

        $escaped = iScramble_rot13($escaped); 

    } 

  

    $numberOfColumns = 8; 

    $numberOfRows = ceil(strlen($escaped) / $numberOfColumns); 

    $scrambled = ""; 

  

    $escaped = str_pad($escaped, $numberOfColumns * $numberOfRows); 
 

    $password = "";

    srand(time());

    for ($j = 0; $j < ($longPwd ? $numberOfRows : 1); $j++)

    {

        $availChars = substr("12345678", 0, $numberOfColumns);

        for ($i = 0 ; $i < $numberOfColumns; $i++)

        {

            $char = $availChars{ rand(0, strlen($availChars)-1) };

            $password .= $char;

            $availChars = str_replace($char, "", $availChars);

        }

    }
 

    $scramblePassword = str_repeat($password, $longPwd ? 1 : $numberOfRows); 
 

    // Do the scrambling 

    $scrambled = str_repeat(" ", $numberOfColumns * $numberOfRows);

    $k = 0; 

    for ($i = 0; $i < $numberOfRows; $i++) 

    { 

        for($j = 0; $j < $numberOfColumns; $j++ ) 

        { 

            $scrambled{(((int)$scramblePassword{$k}) * $numberOfRows) + $i} = $escaped{$k}; 

            $k++; 

        } 

    } 

  

    // Generate the Javascript 

    $javascript = "<script type=\"text/javascript\">\n<!--\n"; 

    $javascript .= "var a='';var b='$scrambled';var c='$password';";

  

    if ($rot13) 

    { 

        $javascript .= "var d='';"; 

    } 

    $javascript .= "for(var i=0;i<$numberOfRows;i++) for(var j=0;j<$numberOfColumns;j++) "; 

  

    if ($rot13) 

    { 

        $javascript .= "{d=b.charCodeAt("; 

    } 

    else 

    { 

        $javascript .= "a+=b.charAt("; 

    } 

  

    if ($longPwd) 

    { 

        $javascript .= "(parseInt(c.charAt(i*$numberOfColumns+j))*$numberOfRows)+i); "; 

    } 

    else 

    { 

        $javascript .= "(parseInt(c.charAt(j))*$numberOfRows)+i);"; 

    } 

  

    if ($rot13) 

    { 

        $javascript .= "if ((d>=65 && d<78) || (d>=97 && d<110)) d+=13; else if ((d>=78 && d<91) || (d>=110 && d<123)) d-=13;a+=String.fromCharCode(d);}"; 

    } 

  

    $javascript .= "document.writeln(unescape(a));\n"; 

    $javascript .= "-->\n</script>\n"; 

  

    return $javascript; 

} 
 

class JavaScriptPacker {

	// constants

	const IGNORE = '$1';
 

	// validate parameters

	private $_script = '';

	private $_encoding = 62;

	private $_fastDecode = true;

	private $_specialChars = false;

	

	private $LITERAL_ENCODING = array(

		'None' => 0,

		'Numeric' => 10,

		'Normal' => 62,

		'High ASCII' => 95

	);

	

	public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false)

	{

		$this->_script = $_script . "\n";

		if (array_key_exists($_encoding, $this->LITERAL_ENCODING))

			$_encoding = $this->LITERAL_ENCODING[$_encoding];

		$this->_encoding = min((int)$_encoding, 95);

		$this->_fastDecode = $_fastDecode;	

		$this->_specialChars = $_specialChars;

	}

	

	public function pack() {

		$this->_addParser('_basicCompression');

		if ($this->_specialChars)

			$this->_addParser('_encodeSpecialChars');

		if ($this->_encoding)

			$this->_addParser('_encodeKeywords');

		

		// go!

		return $this->_pack($this->_script);

	}

	

	// apply all parsing routines

	private function _pack($script) {

		for ($i = 0; isset($this->_parsers[$i]); $i++) {

			$script = call_user_func(array(&$this,$this->_parsers[$i]), $script);

		}

		return $script;

	}

	

	// keep a list of parsing functions, they'll be executed all at once

	private $_parsers = array();

	private function _addParser($parser) {

		$this->_parsers[] = $parser;

	}

	

	// zero encoding - just removal of white space and comments

	private function _basicCompression($script) {

		$parser = new ParseMaster();

		// make safe

		$parser->escapeChar = '\\';

		// protect strings

		$parser->add('/\'[^\'\\n\\r]*\'/', self::IGNORE);

		$parser->add('/"[^"\\n\\r]*"/', self::IGNORE);

		// remove comments

		$parser->add('/\\/\\/[^\\n\\r]*[\\n\\r]/', ' ');

		$parser->add('/\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\//', ' ');

		// protect regular expressions

		$parser->add('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$2'); // IGNORE

		$parser->add('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', self::IGNORE);

		// remove: ;;; doSomething();

		if ($this->_specialChars) $parser->add('/;;;[^\\n\\r]+[\\n\\r]/');

		// remove redundant semi-colons

		$parser->add('/\\(;;\\)/', self::IGNORE); // protect for (;;) loops

		$parser->add('/;+\\s*([};])/', '$2');

		// apply the above

		$script = $parser->exec($script);
 

		// remove white-space

		$parser->add('/(\\b|\\x24)\\s+(\\b|\\x24)/', '$2 $3');

		$parser->add('/([+\\-])\\s+([+\\-])/', '$2 $3');

		$parser->add('/\\s+/', '');

		// done

		return $parser->exec($script);

	}

	

	private function _encodeSpecialChars($script) {

		$parser = new ParseMaster();

		// replace: $name -> n, $$name -> na

		$parser->add('/((\\x24+)([a-zA-Z$_]+))(\\d*)/',

					 array('fn' => '_replace_name')

		);

		// replace: _name -> _0, double-underscore (__name) is ignored

		$regexp = '/\\b_[A-Za-z\\d]\\w*/';

		// build the word list

		$keywords = $this->_analyze($script, $regexp, '_encodePrivate');

		// quick ref

		$encoded = $keywords['encoded'];

		

		$parser->add($regexp,

			array(

				'fn' => '_replace_encoded',

				'data' => $encoded

			)

		);

		return $parser->exec($script);

	}

	

	private function _encodeKeywords($script) {

		// escape high-ascii values already in the script (i.e. in strings)

		if ($this->_encoding > 62)

			$script = $this->_escape95($script);

		// create the parser

		$parser = new ParseMaster();

		$encode = $this->_getEncoder($this->_encoding);

		// for high-ascii, don't encode single character low-ascii

		$regexp = ($this->_encoding > 62) ? '/\\w\\w+/' : '/\\w+/';

		// build the word list

		$keywords = $this->_analyze($script, $regexp, $encode);

		$encoded = $keywords['encoded'];

		

		// encode

		$parser->add($regexp,

			array(

				'fn' => '_replace_encoded',

				'data' => $encoded

			)

		);

		if (empty($script)) return $script;

		else {

			//$res = $parser->exec($script);

			//$res = $this->_bootStrap($res, $keywords);

			//return $res;

			return $this->_bootStrap($parser->exec($script), $keywords);

		}

	}

	

	private function _analyze($script, $regexp, $encode) {

		// analyse

		// retreive all words in the script

		$all = array();

		preg_match_all($regexp, $script, $all);

		$_sorted = array(); // list of words sorted by frequency

		$_encoded = array(); // dictionary of word->encoding

		$_protected = array(); // instances of "protected" words

		$all = $all[0]; // simulate the javascript comportement of global match

		if (!empty($all)) {

			$unsorted = array(); // same list, not sorted

			$protected = array(); // "protected" words (dictionary of word->"word")

			$value = array(); // dictionary of charCode->encoding (eg. 256->ff)

			$this->_count = array(); // word->count

			$i = count($all); $j = 0; //$word = null;

			// count the occurrences - used for sorting later

			do {

				--$i;

				$word = '$' . $all[$i];

				if (!isset($this->_count[$word])) {

					$this->_count[$word] = 0;

					$unsorted[$j] = $word;

					// make a dictionary of all of the protected words in this script

					//  these are words that might be mistaken for encoding

					//if (is_string($encode) && method_exists($this, $encode))

					$values[$j] = call_user_func(array(&$this, $encode), $j);

					$protected['$' . $values[$j]] = $j++;

				}

				// increment the word counter

				$this->_count[$word]++;

			} while ($i > 0);

			// prepare to sort the word list, first we must protect

			//  words that are also used as codes. we assign them a code

			//  equivalent to the word itself.

			// e.g. if "do" falls within our encoding range

			//      then we store keywords["do"] = "do";

			// this avoids problems when decoding

			$i = count($unsorted);

			do {

				$word = $unsorted[--$i];

				if (isset($protected[$word]) /*!= null*/) {

					$_sorted[$protected[$word]] = substr($word, 1);

					$_protected[$protected[$word]] = true;

					$this->_count[$word] = 0;

				}

			} while ($i);

			

			// sort the words by frequency

			// Note: the javascript and php version of sort can be different :

			// in php manual, usort :

			// " If two members compare as equal,

			// their order in the sorted array is undefined."

			// so the final packed script is different of the Dean's javascript version

			// but equivalent.

			// the ECMAscript standard does not guarantee this behaviour,

			// and thus not all browsers (e.g. Mozilla versions dating back to at

			// least 2003) respect this. 

			usort($unsorted, array(&$this, '_sortWords'));

			$j = 0;

			// because there are "protected" words in the list

			//  we must add the sorted words around them

			do {

				if (!isset($_sorted[$i]))

					$_sorted[$i] = substr($unsorted[$j++], 1);

				$_encoded[$_sorted[$i]] = $values[$i];

			} while (++$i < count($unsorted));

		}

		return array(

			'sorted'  => $_sorted,

			'encoded' => $_encoded,

			'protected' => $_protected);

	}

	

	private $_count = array();

	private function _sortWords($match1, $match2) {

		return $this->_count[$match2] - $this->_count[$match1];

	}

	

	// build the boot function used for loading and decoding

	private function _bootStrap($packed, $keywords) {

		$ENCODE = $this->_safeRegExp('$encode\\($count\\)');
 

		// $packed: the packed script

		$packed = "'" . $this->_escape($packed) . "'";
 

		// $ascii: base for encoding

		$ascii = min(count($keywords['sorted']), $this->_encoding);

		if ($ascii == 0) $ascii = 1;
 

		// $count: number of words contained in the script

		$count = count($keywords['sorted']);
 

		// $keywords: list of words contained in the script

		foreach ($keywords['protected'] as $i=>$value) {

			$keywords['sorted'][$i] = '';

		}

		// convert from a string to an array

		ksort($keywords['sorted']);

		$keywords = "'" . implode('|',$keywords['sorted']) . "'.split('|')";
 

		$encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii);

		$encode = $this->_getJSFunction($encode);

		$encode = preg_replace('/_encoding/','$ascii', $encode);

		$encode = preg_replace('/arguments\\.callee/','$encode', $encode);

		$inline = '\\$count' . ($ascii > 10 ? '.toString(\\$ascii)' : '');
 

		// $decode: code snippet to speed up decoding

		if ($this->_fastDecode) {

			// create the decoder

			$decode = $this->_getJSFunction('_decodeBody');

			if ($this->_encoding > 62)

				$decode = preg_replace('/\\\\w/', '[\\xa1-\\xff]', $decode);

			// perform the encoding inline for lower ascii values

			elseif ($ascii < 36)

				$decode = preg_replace($ENCODE, $inline, $decode);

			// special case: when $count==0 there are no keywords. I want to keep

			//  the basic shape of the unpacking funcion so i'll frig the code...

			if ($count == 0)

				$decode = preg_replace($this->_safeRegExp('($count)\\s*=\\s*1'), '$1=0', $decode, 1);

		}
 

		// boot function

		$unpack = $this->_getJSFunction('_unpack');

		if ($this->_fastDecode) {

			// insert the decoder

			$this->buffer = $decode;

			$unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastDecode'), $unpack, 1);

		}

		$unpack = preg_replace('/"/', "'", $unpack);

		if ($this->_encoding > 62) { // high-ascii

			// get rid of the word-boundaries for regexp matches

			$unpack = preg_replace('/\'\\\\\\\\b\'\s*\\+|\\+\s*\'\\\\\\\\b\'/', '', $unpack);

		}

		if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) {

			// insert the encode function

			$this->buffer = $encode;

			$unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastEncode'), $unpack, 1);

		} else {

			// perform the encoding inline

			$unpack = preg_replace($ENCODE, $inline, $unpack);

		}

		// pack the boot function too

		$unpackPacker = new JavaScriptPacker($unpack, 0, false, true);

		$unpack = $unpackPacker->pack();

		

		// arguments

		$params = array($packed, $ascii, $count, $keywords);

		if ($this->_fastDecode) {

			$params[] = 0;

			$params[] = '{}';

		}

		$params = implode(',', $params);

		

		// the whole thing

		return 'eval(' . $unpack . '(' . $params . "))\n";

	}

	

	private $buffer;

	private function _insertFastDecode($match) {

		return '{' . $this->buffer . ';';

	}

	private function _insertFastEncode($match) {

		return '{$encode=' . $this->buffer . ';';

	}

	

	// mmm.. ..which one do i need ??

	private function _getEncoder($ascii) {

		return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ?

		       '_encode95' : '_encode62' : '_encode36' : '_encode10';

	}

	

	// zero encoding

	// characters: 0123456789

	private function _encode10($charCode) {

		return $charCode;

	}

	

	// inherent base36 support

	// characters: 0123456789abcdefghijklmnopqrstuvwxyz

	private function _encode36($charCode) {

		return base_convert($charCode, 10, 36);

	}

	

	// hitch a ride on base36 and add the upper case alpha characters

	// characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

	private function _encode62($charCode) {

		$res = '';

		if ($charCode >= $this->_encoding) {

			$res = $this->_encode62((int)($charCode / $this->_encoding));

		}

		$charCode = $charCode % $this->_encoding;

		

		if ($charCode > 35)

			return $res . chr($charCode + 29);

		else

			return $res . base_convert($charCode, 10, 36);

	}

	

	// use high-ascii values

	// characters: ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ

	private function _encode95($charCode) {

		$res = '';

		if ($charCode >= $this->_encoding)

			$res = $this->_encode95($charCode / $this->_encoding);

		

		return $res . chr(($charCode % $this->_encoding) + 161);

	}

	

	private function _safeRegExp($string) {

		return '/'.preg_replace('/\$/', '\\\$', $string).'/';

	}

	

	private function _encodePrivate($charCode) {

		return "_" . $charCode;

	}

	

	// protect characters used by the parser

	private function _escape($script) {

		return preg_replace('/([\\\\\'])/', '\\\$1', $script);

	}

	

	// protect high-ascii characters already in the script

	private function _escape95($script) {

		return preg_replace_callback(

			'/[\\xa1-\\xff]/',

			array(&$this, '_escape95Bis'),

			$script

		);

	}

	private function _escape95Bis($match) {

		return '\x'.((string)dechex(ord($match)));

	}

	

	

	private function _getJSFunction($aName) {

		if (defined('self::JSFUNCTION'.$aName))

			return constant('self::JSFUNCTION'.$aName);

		else 

			return '';

	}

	

	// JavaScript Functions used.

	// Note : In Dean's version, these functions are converted

	// with 'String(aFunctionName);'.

	// This internal conversion complete the original code, ex :

	// 'while (aBool) anAction();' is converted to

	// 'while (aBool) { anAction(); }'.

	// The JavaScript functions below are corrected.

	

	// unpacking function - this is the boot strap function

	//  data extracted from this packing routine is passed to

	//  this function when decoded in the target

	// NOTE ! : without the ';' final.

	const JSFUNCTION_unpack =
 

'function($packed, $ascii, $count, $keywords, $encode, $decode) {

    while ($count--) {

        if ($keywords[$count]) {

            $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]);

        }

    }

    return $packed;

}';

/*

'function($packed, $ascii, $count, $keywords, $encode, $decode) {

    while ($count--)

        if ($keywords[$count])

            $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]);

    return $packed;

}';

*/

	

	// code-snippet inserted into the unpacker to speed up decoding

	const JSFUNCTION_decodeBody =

//_decode = function() {

// does the browser support String.replace where the

//  replacement value is a function?
 

'    if (!\'\'.replace(/^/, String)) {

        // decode all the values we need

        while ($count--) {

            $decode[$encode($count)] = $keywords[$count] || $encode($count);

        }

        // global replacement function

        $keywords = [function ($encoded) {return $decode[$encoded]}];

        // generic match

        $encode = function () {return \'\\\\w+\'};

        // reset the loop counter -  we are now doing a global replace

        $count = 1;

    }

';

//};

/*

'	if (!\'\'.replace(/^/, String)) {

        // decode all the values we need

        while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);

        // global replacement function

        $keywords = [function ($encoded) {return $decode[$encoded]}];

        // generic match

        $encode = function () {return\'\\\\w+\'};

        // reset the loop counter -  we are now doing a global replace

        $count = 1;

    }';

*/

	

	 // zero encoding

	 // characters: 0123456789

	 const JSFUNCTION_encode10 =

'function($charCode) {

    return $charCode;

}';//;';

	

	 // inherent base36 support

	 // characters: 0123456789abcdefghijklmnopqrstuvwxyz

	 const JSFUNCTION_encode36 =

'function($charCode) {

    return $charCode.toString(36);

}';//;';

	

	// hitch a ride on base36 and add the upper case alpha characters

	// characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

	const JSFUNCTION_encode62 =

'function($charCode) {

    return ($charCode < _encoding ? \'\' : arguments.callee(parseInt($charCode / _encoding))) +

    (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));

}';

	

	// use high-ascii values

	// characters: ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ

	const JSFUNCTION_encode95 =

'function($charCode) {

    return ($charCode < _encoding ? \'\' : arguments.callee($charCode / _encoding)) +

        String.fromCharCode($charCode % _encoding + 161);

}'; 

	

}
 
 

class ParseMaster {

	public $ignoreCase = false;

	public $escapeChar = '';

	

	// constants

	const EXPRESSION = 0;

	const REPLACEMENT = 1;

	const LENGTH = 2;

	

	// used to determine nesting levels

	private $GROUPS = '/\\(/';//g

	private $SUB_REPLACE = '/\\$\\d/';

	private $INDEXED = '/^\\$\\d+$/';

	private $TRIM = '/([\'"])\\1\\.(.*)\\.\\1\\1$/';

	private $ESCAPE = '/\\\./';//g

	private $QUOTE = '/\'/';

	private $DELETED = '/\\x01[^\\x01]*\\x01/';//g

	

	public function add($expression, $replacement = '') {

		// count the number of sub-expressions

		//  - add one because each pattern is itself a sub-expression

		$length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string)$expression), $out);

		

		// treat only strings $replacement

		if (is_string($replacement)) {

			// does the pattern deal with sub-expressions?

			if (preg_match($this->SUB_REPLACE, $replacement)) {

				// a simple lookup? (e.g. "$2")

				if (preg_match($this->INDEXED, $replacement)) {

					// store the index (used for fast retrieval of matched strings)

					$replacement = (int)(substr($replacement, 1)) - 1;

				} else { // a complicated lookup (e.g. "Hello $2 $1")

					// build a function to do the lookup

					$quote = preg_match($this->QUOTE, $this->_internalEscape($replacement))

					         ? '"' : "'";

					$replacement = array(

						'fn' => '_backReferences',

						'data' => array(

							'replacement' => $replacement,

							'length' => $length,

							'quote' => $quote

						)

					);

				}

			}

		}

		// pass the modified arguments

		if (!empty($expression)) $this->_add($expression, $replacement, $length);

		else $this->_add('/^$/', $replacement, $length);

	}

	

	public function exec($string) {

		// execute the global replacement

		$this->_escaped = array();

		

		// simulate the _patterns.toSTring of Dean

		$regexp = '/';

		foreach ($this->_patterns as $reg) {

			$regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|';

		}

		$regexp = substr($regexp, 0, -1) . '/';

		$regexp .= ($this->ignoreCase) ? 'i' : '';

		

		$string = $this->_escape($string, $this->escapeChar);

		$string = preg_replace_callback(

			$regexp,

			array(

				&$this,

				'_replacement'

			),

			$string

		);

		$string = $this->_unescape($string, $this->escapeChar);

		

		return preg_replace($this->DELETED, '', $string);

	}

		

	public function reset() {

		// clear the patterns collection so that this object may be re-used

		$this->_patterns = array();

	}
 

	// private

	private $_escaped = array();  // escaped characters

	private $_patterns = array(); // patterns stored by index

	

	// create and add a new pattern to the patterns collection

	private function _add() {

		$arguments = func_get_args();

		$this->_patterns[] = $arguments;

	}

	

	// this is the global replace function (it's quite complicated)

	private function _replacement($arguments) {

		if (empty($arguments)) return '';

		

		$i = 1; $j = 0;

		// loop through the patterns

		while (isset($this->_patterns[$j])) {

			$pattern = $this->_patterns[$j++];

			// do we have a result?

			if (isset($arguments[$i]) && ($arguments[$i] != '')) {

				$replacement = $pattern[self::REPLACEMENT];

				

				if (is_array($replacement) && isset($replacement['fn'])) {

					

					if (isset($replacement['data'])) $this->buffer = $replacement['data'];

					return call_user_func(array(&$this, $replacement['fn']), $arguments, $i);

					

				} elseif (is_int($replacement)) {

					return $arguments[$replacement + $i];

				

				}

				$delete = ($this->escapeChar == '' ||

				           strpos($arguments[$i], $this->escapeChar) === false)

				        ? '' : "\x01" . $arguments[$i] . "\x01";

				return $delete . $replacement;

			

			// skip over references to sub-expressions

			} else {

				$i += $pattern[self::LENGTH];

			}

		}

	}

	

	private function _backReferences($match, $offset) {

		$replacement = $this->buffer['replacement'];

		$quote = $this->buffer['quote'];

		$i = $this->buffer['length'];

		while ($i) {

			$replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement);

		}

		return $replacement;

	}

	

	private function _replace_name($match, $offset){

		$length = strlen($match[$offset + 2]);

		$start = $length - max($length - strlen($match[$offset + 3]), 0);

		return substr($match[$offset + 1], $start, $length) . $match[$offset + 4];

	}

	

	private function _replace_encoded($match, $offset) {

		return $this->buffer[$match[$offset]];

	}

	

	

	// php : we cannot pass additional data to preg_replace_callback,

	// and we cannot use &$this in create_function, so let's go to lower level

	private $buffer;

	

	// encode escaped characters

	private function _escape($string, $escapeChar) {

		if ($escapeChar) {

			$this->buffer = $escapeChar;

			return preg_replace_callback(

				'/\\' . $escapeChar . '(.)' .'/',

				array(&$this, '_escapeBis'),

				$string

			);

			

		} else {

			return $string;

		}

	}

	private function _escapeBis($match) {

		$this->_escaped[] = $match[1];

		return $this->buffer;

	}

	

	// decode escaped characters

	private function _unescape($string, $escapeChar) {

		if ($escapeChar) {

			$regexp = '/'.'\\'.$escapeChar.'/';

			$this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0);

			return preg_replace_callback

			(

				$regexp,

				array(&$this, '_unescapeBis'),

				$string

			);

			

		} else {

			return $string;

		}

	}

	private function _unescapeBis() {

		if (isset($this->_escaped[$this->buffer['i']])

			&& $this->_escaped[$this->buffer['i']] != '')

		{

			 $temp = $this->_escaped[$this->buffer['i']];

		} else {

			$temp = '';

		}

		$this->buffer['i']++;

		return $this->buffer['escapeChar'] . $temp;

	}

	

	private function _internalEscape($string) {

		return preg_replace($this->ESCAPE, '', $string);

	}

}

  

$script = <<<EOF123

alert('Hello World!');

/// test

alert('This is a test');

EOF123;
 

$t1 = microtime(true);
 

$packer = new JavaScriptPacker($script, 'None', false, true);

$packed = $packer->pack();
 

echo new JavaScriptPacker($packed, 'None', false, true);
 

?>

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0
Comment
Question by:hankknight
3 Comments
 
LVL 49

Accepted Solution

by:
Roonaan earned 250 total points
ID: 21846100
Wouldn;t you just want to echo $packed?
0
 
LVL 48

Assisted Solution

by:hernst42
hernst42 earned 250 total points
ID: 21846153
This line
echo new JavaScriptPacker($packed, 'None', false, true);
should either be

echo new JavaScriptPacker($script, 'None', false, true)->pack();
or
echo $packed;

You can't echo out an object until implement the __toString()-Method in JavaScriptPacker
0
 
LVL 16

Author Comment

by:hankknight
ID: 21846493
Thanks.
0

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