preg_replace使用匹配的模式替换

Question

I want to ask if it's possible to use a matched regex pattern in determining the replacement from an array. For example

$rpl['brat'] = 'qwerty';
$rpl['omri'] = 'asdfgh';

$str1 = 'abc brat bca';
$str2 = 'abc omri bca';

print_r(preg_replace('#bc (.+?) bc#'), $rpl[$1], $str1)); // aqwertya
print_r(preg_replace('#bc (.+?) bc#'), $rpl[$1], $str2)); // aasdfgha

Now obviously $1 is incorrect syntax, but this is just to show the point I'm making. How can I do this?

Answer 1

Using preg_replace_callback with modified regular expression:

$rpl['brat'] = 'qwerty';
$rpl['omri'] = 'asdfgh';

$str1 = 'abc brat bca';
$str2 = 'abc omri bca';

print_r(preg_replace_callback('/bc (\w+) bc/', function($match) use($rpl) {
    return $rpl[$match[1]];
}, $str1)); // => abc qwerty bca

print_r("
");

print_r(preg_replace_callback('/bc (\w+) bc/', function($match) use($rpl) {
    return $rpl[$match[1]];
}, $str1)); // => aqwertya

output:

abc qwerty bca
aqwertya