<?php
$string = "The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April 1986, in the No. 4 nuclear reactor at the Chernobyl Nuclear Power Plant, near the city of Pripyat, in the north of the Ukrainian SSR.";
$pattern1 = '%[A-Z]\w+%';
$pattern2 = '%\d+%';
preg_replace_callback_array(
[
'~[a]+~i' => function ($match) {
echo strlen($match[0]), ' matches for "a" found', PHP_EOL;
},
'~[b]+~i' => function ($match) {
echo strlen($match[0]), ' matches for "b" found', PHP_EOL;
}
],
$string
);
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "a" found
1 matches for "b" found
1 matches for "b" found