PHP在字符串中查找多个单词并包装在<span>标记中

Question

Im finding keyword "paintball" in a string, and wrapping it in span tags to change it colour to red like this...

$newoutput = str_replace("Paintball", "<span style=\"color:red;\">Paintball</span>", $output); 

echo $newoutput;

Which works, but people are writing it in the field as "Paintball", "paintball", "Paint Ball", "paint ball" etc.

Is there a better way of doing this rather than repeating it for every word?

Ideally something like...

$words = "Paintball", "paintball", "Paint Ball", "paint ball";

$newoutput = str_replace("($words)", "<span>$1</span>", $output);

But im not sure how to write it.

Ok, so a mixture of answers got me here...

$newoutput = preg_replace("/(paint\s*ball|airsoft|laser\s*tag)/i", "<span>$1</span>", $output); 
    echo $newoutput;

And it works perfectly, thank you very much!

Answer 1

This should work for you:

(Here I just use preg_replace() with the modifier i for case insensitivity)

<?php

    $output = "LaSer Tag";
    $newoutput = preg_replace("/(Airsoft|Paintball|laser tag)/i", "<span style=\"color:red;\">$1</span>", $output); 
    echo $newoutput;

?>

EDIT:

Besides that this is invalid syntax:

$words = "Paintball", "paintball", "Paint Ball", "paint ball";

and you probably meant this:

$words = ["Paintball", "paintball", "Paint Ball", "paint ball"];
       //^ See here array syntax                              ^

You can use something like this then

$newoutput = preg_replace("/(" . implode("|", $words) . ")/i", "<span style=\"color:red;\">$1</span>", $output);