<?php
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function mod_b64_decode($data){
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return base64_decode(str_replace(",","/",$data));
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}
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function mod_b64_encode($data){
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return str_replace("/",",",str_replace("=","",base64_encode($data)));
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}
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function utf8_to_html($str){
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$len = strlen($str);
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$out = "";
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for($i=0;$i<$len;$i+=2){
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$val = ord($str[$i]);
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$next_val = ord($str[$i+1]);
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if ($val<255){
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$out.="&#".($val*256+$next_val).";";
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}else{
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$out.=$str[$i].$str[$i+1];
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}
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}
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return $out;
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}
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function iil_utf7_decode($str, $raw=false){
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if (strpos($str, '&')===false) return $str;
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$len = strlen($str);
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$in_b64 = false;
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$b64_data = "";
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$out = "";
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for ($i=0;$i<$len;$i++){
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$char = $str[$i];
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if ($char=='&') $in_b64 = true;
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else if ($in_b64 && $char=='-'){
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$in_b64 = false;
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if ($b64_data=="") $out.="&";
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else{
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$dec=mod_b64_decode($b64_data);
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$out.=($raw?$dec:utf8_to_html($dec));
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$b64_data = "";
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}
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}else if ($in_b64) $b64_data.=$char;
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else $out.=$char;
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}
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return $out;
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}
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function iil_utf7_encode($str){
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if (!ereg("[\200-\237]",$str) && !ereg("[\241-\377]",$str))
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return $str;
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$len = strlen($str);
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for ($i=0;$i<$len;$i++){
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$val = ord($str[$i]);
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if ($val>=224 && $val<=239){
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$unicode = ($val-224) * 4096 + (ord($str[$i+1])-128) * 64 + (ord($str[$i+2])-128);
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$i+=2;
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$utf_code.=chr((int)($unicode/256)).chr($unicode%256);
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}else if ($val>=192 && $val<=223){
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$unicode = ($val-192) * 64 + (ord($str[$i+1])-128);
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$i++;
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$utf_code.=chr((int)($unicode/256)).chr($unicode%256);
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}else{
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if ($utf_code){
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$out.='&'.mod_b64_encode($utf_code).'-';
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$utf_code="";
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}
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if ($str[$i]=="-") $out.="&";
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$out.=$str[$i];
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}
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}
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if ($utf_code)
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$out.='&'.mod_b64_encode($utf_code).'-';
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return $out;
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}
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?>
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