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@ 2020-05-06T07:41:03Z

<?php

$strings = [
    "This is a (first) test with the first hit",
    "This is a (first] test with the first hit"
];

foreach ($strings as $str) {
    preg_match(
        '/(?:\(first\)|\[first]|{first})(*SKIP)(*FAIL)|\bfirst\b/',
        $str,
        $matches,
        PREG_OFFSET_CAPTURE);
    print_r($matches);
}

Output
Performance
VLD
References
Branches

preg_match: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive previewkey bindings

29.64 ms | 405 KiB | 5 Q