will call this function internally to compress the javascript code for more efficient delivery. Parameters: $sFile - (stirng): The file to be compressed. */ function xajaxCompressFile($sFile) { //remove windows cariage returns $sFile = str_replace("\r",'',$sFile); //array to store replaced literal strings $literal_strings = array(); //explode the string into lines $lines = explode("\n",$sFile); //loop through all the lines, building a new string at the same time as removing literal strings $clean = ''; $inComment = false; $literal = ''; $inQuote = false; $escaped = false; $quoteChar = ''; $iLen = count($lines); for($i=0; $i<$iLen; ++$i) { $line = $lines[$i]; $inNormalComment = false; //loop through line's characters and take out any literal strings, replace them with ___i___ where i is the index of this string $jLen = strlen($line); for($j=0; $j<$jLen; ++$j) { $c = substr($line,$j,1); $d = substr($line,$j,2); //look for start of quote if(!$inQuote && !$inComment) { //is this character a quote or a comment if(($c=='"' || $c=="'") && !$inComment && !$inNormalComment) { $inQuote = true; $inComment = false; $escaped = false; $quoteChar = $c; $literal = $c; } else if($d=="/*" && !$inNormalComment) { $inQuote = false; $inComment = true; $escaped = false; $quoteChar = $d; $literal = $d; $j++; } else if($d=="//") //ignore string markers that are found inside comments { $inNormalComment = true; } else { if (!$inNormalComment) $clean .= $c; } } else //allready in a string so find end quote { if($c == $quoteChar && !$escaped && !$inComment) { $inQuote = false; $literal .= $c; //subsitute in a marker for the string $clean .= "___" . count($literal_strings) . "___"; //push the string onto our array array_push($literal_strings,$literal); } else if($inComment && $d=="*/") { $inComment = false; $literal .= $d; ++$j; } else if($c == "\\" && !$escaped) $escaped = true; else $escaped = false; $literal .= $c; } } if($inComment) $literal .= "\n"; $clean .= "\n"; } //explode the clean string into lines again $lines = explode("\n",$clean); //now process each line at a time $iLen = count($lines); for($i=0; $i<$iLen; ++$i) { $line = $lines[$i]; //remove comments $line = preg_replace("/\/\/(.*)/","",$line); //strip leading and trailing whitespace $line = trim($line); //remove all whitespace with a single space $line = preg_replace("/\s+/"," ",$line); //remove any whitespace that occurs after/before an operator $line = preg_replace("/\s*([!\}\{;,&=\|\-\+\*\/\)\(:])\s*/","\\1",$line); $lines[$i] = $line; } //implode the lines $sFile = implode("\n",$lines); //make sure there is a max of 1 \n after each line $sFile = preg_replace("/[\n]+/","\n",$sFile); //strip out line breaks that immediately follow a semi-colon $sFile = preg_replace("/;\n/",";",$sFile); //curly brackets aren't on their own $sFile = preg_replace("/[\n]*\{[\n]*/","{",$sFile); //finally loop through and replace all the literal strings: $iLen = count($literal_strings); for($i=0; $i<$iLen; ++$i) $sFile = str_replace('___'.$i.'___',$literal_strings[$i],$sFile); return $sFile; }