$end = preg_replace($pattern, $replacement, $str);
How can I make the replacement string $replacement vary with each match in $str? For example, I want to replace each matched string with an associated image. Something about callbacks... right?
Add a comment
|
2 Answers
Yes, something with callbacks. Specifically preg_replace_callback, which makes repeated calls redundant. For a list of things to replace:
$src = preg_replace_callback('/(thing1|thing2|thing3)/', 'cb_vars', $src);
Where the callback can do some form of lookup or conversion:
function cb_vars($m) {
return strtoupper($m[1]);
}
Likewise can you do that inline with the normal preg_replace and the /e modifier.
1 Comment
emc
Yes! Awesome, I was having trouble reading the php docs. Thanks for spelling it out...
You need to either use preg_replace_callback, or the /e modifier in the pattern string. The first is more powerful, but the second is more convenient if you are only after something relatively simple.
