在php中可以使用“htmlspecialchars()”函数将html字符转义，该函数的作用是将特殊字符转换为html实体，其用法为“htmlspecialchars($string)”，其参数“$string”代表待转换的字符。
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示例
<?php$new = htmlspecialchars("<a href='test'>test</a>", ent_quotes);echo $new; // <a href='test'>test</a>?>
<?phpfunction fixtags($text){$text = htmlspecialchars($text);$text = preg_replace("/=/", "=\"\"", $text);$text = preg_replace("/"/", ""\"", $text);$tags = "/<(\/|)(\w*)(\ |)(\w*)([\\\=]*)(?|(\")\""\"|)(?|(.*)?"(\")|)([\ ]?)(\/|)>/i";$replacement = "<$1$2$3$4$5$6$7$8$9$10>";$text = preg_replace($tags, $replacement, $text);$text = preg_replace("/=\"\"/", "=", $text);return $text;}?>an example:<?php$string = "this is smaller < than this<br />this is greater > than this<br />this is the same = as this<br /><a href=\"http://www.example.com/example.php?test=test\">this is a link</a><br /><b>bold</b> <i>italic</i> etc...";echo fixtags($string);?>
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以上就是php如何将html字符转义？的详细内容。