php HTML转义字符

显示HTML转义字符并还原

$str = htmlentities("<>& *;");
echo $str;
$table = get_html_translation_table(HTML_ENTITIES);
$rev_trans = array_flip($table);
echo strtr($str,$rev_trans);

在HTML表中加入其他转义字符

$str = htmlentities("<>& *;");
echo $str;
$table = get_html_translation_table(HTML_ENTITIES);
$table[" "] = " ";
$encoded = strtr($str, $table);
echo $encoded;