Fastest way to replace string patterns by mask

Question

I have string like

$string = "string_key::%foo%:%bar%";

, and array of params

$params = array("foo" => 1, "bar" => 2);

How can I replace this params in $string pattern? Expected result is

string_key::1:2

Answer 1

First, you need to rewrite the $params array:

$string = "string_key::%foo%:%bar%";
$params = array("foo" => 1, "bar" => 2);
foreach($params as $key => $value) {
    $search[] = "%" . $key . "%";
    $replace[] = $value;
}

After that, you can simply pass the arrays to str_replace():

$output = str_replace($search, $replace, $string);

^{View output on Codepad}

Answer 2

On a personal note, I did this one:

$string = "string_key::%foo%:%bar%";
$params = array("%foo%" => 1, "%bar%" => 2);
$output = strtr($string, $params);

You do not have to do anything else because if there is some value in the array or the string is not replaced and overlooked.

Fast and simple method for pattern replacement.