带有file_get_contents的preg_replace

Question

I have looked at a couple of questions here, and done a Google search but I cannot seem to find the correct way to go about doing this.

I am using this function

function replace_c($content){
    global $db;
    $replacements = $db->query("SELECT * FROM `replacements`");
    while($replace = $replacements->fetch_assoc()){
        preg_replace("/".$replace['triggers']."/i",$replace['php'], $content);
    }
    return $content;
}

and this is my call to the function

$contents = replace_c(file_get_contents("templates/" . $settings['theme'] . "/header.html"));

It doesn't give an error, it just doesn't replace the text like it should so I am not sure if the function is actually working. I did try preg_replace_callback but I don't think I fully understand how it works and was producing nothing but errors, do I have to go the callback route, or am I just missing something in my current function?

Answer 1

Kira,

The preg_Replace function returns the replaced string. The $content subject you post to it will not update as a reference. So try changing the code to;

$content = preg_replace("/".$replace['triggers']."/i",$replace['php'], $content);