如何在php字符串中将文本插入html标签？

Question

i have been dealing with this for awhile and i could not figure out how to do the following in PHP:

$string = "this is test <pre>somrthing in <p>pharagraph</p></pre> dont know tell me <pre>value33 kooo ok</pre> this is php regress <pre>teeth value</pre> ok how"; 

function get_innercode($string) {
preg_match_all("#<pre>(.*?)</pre>#", $string, $foo); 
echo implode("
", $foo[1]); 
}
    $insert1=get_innercode($string);



    $insert2=" 2 place me in the pre tag"; // you can ignore this

    $string="this is test  <pre> WHERE $insert1 SHOULD BE</pre> dont know tell me  <pre>WHERE $insert2 SHOULD BE</pre> ok how ";

how can i do this? Please note i cannot do

$string="some text here <pre> WHERE $insert1 SHOULD BE</pre> some more text here <pre>WHERE $insert2 SHOULD BE</pre> ok how";

because i am getting $insert1 and $insert2 from $string to modify. i need to place it back in there where they come from. thank you

Answer 1

It's pretty easy to do:

$insert1 =" 1 place me in the pre tag";
$insert2 =" 2 place me in the pre tag";

$string = "some text here <pre>{$insert1}</pre> some more text here <pre>{$insert2}</pre> and may be some more text or ";

You can echo a variable from inside a string when it's wrapped around double quotes. This does not work with single quotes.

Edit: This might be what you are looking for then:

$string = "This my <code>awesome</code> code";

$string = preg_replace('/<code>(.*?)<\/code>/', '<pre>$1</pre>', $string);