car*_*pii 8 php iconv html-entities
我有一堆正在处理的文本/ html文档
其中一些包含编码的html实体,我试图将其转换为原始解码的utf字符.
这很容易使用html_entity_decode,但是,某些实体是无效的,例如
򙦙
出于这个原因,我正在使用正则表达式来提取每个单独的实体,然后尝试以某种方式验证它们.
如果一个实体无效,我想把它保留򙦙在文档中,但像编码的东西&仍然会变成&.
只是一些示例测试代码我敲了..
<?php
function dump_chars($s)
{
if (preg_match_all('/&[#A-Za-z0-9]+;/', $s, $matches))
{
foreach ($matches[0] as $m)
{
$decoded = html_entity_decode($m, ENT_QUOTES, "UTF-8");
echo "[" . htmlentities($m, ENT_QUOTES, "UTF-8") . "] ";
echo "Decoded: [" . $decoded . "] ";
echo "Hex: [" . bin2hex($decoded) . "] ";
echo "detect: [" . mb_detect_encoding($decoded) . "]";
echo "<br>";
}
}
}
$payload = "" & ͉ ’ 򙦙";
echo "<html><head><meta charset='UTF-8'></head><body>";
dump_chars($payload);
我对如何最好地验证实体感到有点空白,请给我一些帮助.
我终于找到了办法..
function decode_numeric_entities($s)
{
$result = $s;
$convmap = array(0x0, 0x2FFFF, 0, 0xFFFF);
if (preg_match_all('/&[#A-Za-z0-9]+;/', $s, $matches))
{
foreach ($matches[0] as $m)
{
$decoded = mb_decode_numericentity($m, $convmap, 'UTF-8');
$result = str_replace($m, $decoded, $result);
}
}
return $result;
}
通过此函数运行字符串会将所有有效实体转换为其实际的 utf 字符，将所有无效实体保留为实体