仅替换 之间的特定字符和</tag>在 PHP 中
我有类似 的东西<1><2></code>
我想得到这个:<1><2></code>
但我只想在 <code></code>
标签内应用它,而不是在其他任何地方.
I have something like <code> <1> <2> </code>
and I would like to get this : <code> <1> <2> </code>
but I want to apply this only inside the <code></code>
tags and not anywhere else.
我已经有了这个:
$txt = $this->input->post('field');
$patterns = array(
"other stuff to find", "/<code>.*(<).*<\/code>/m"
);
$replacements = array(
"other stuff to replace", "<"
);
$records = preg_replace($patterns,$replacements, $txt);
它成功替换了字符,但它删除了包围的 </code>
标签
It replaces successfully the character but it removes the surrounded <code></code>
tags
任何帮助将不胜感激!谢谢
Any help will be very appreciated ! Thanks
其他可能,使用回调函数:
Other possibility, using callback function:
<?php
$test = "<code> <1> <2></code> some other text <code> other code <1> <2></code>";
$text = preg_replace_callback("#<code>(.*?)</code>#s",'replaceInCode',$test);
echo htmlspecialchars($test."<br />".$text);
function replaceInCode($row){
$replace = array('<' => '<','>' => '>');
$text=str_replace(array_keys($replace),array_values($replace),$row[1]);
return "<code>$text</code>";
}
在没有第二个函数的情况下实现这一点并不容易(甚至不确定是否可能),因为可以有多个 <块内的符号.
It is not easy (not sure if even possible) to accomplish that without second function, as there can be multiple < symbols inside block.
在此处阅读更多信息:http://php.net/preg_replace_callback