3v4l.org

run code in 500+ PHP versions simultaneously

@ 2022-07-26T09:31:07Z

<?php

$keywords = ["key1", "key2"];
$escaped = implode('|', array_map('preg_quote', $keywords));
$pattern = "/\b(?:" . $escaped . ")\b" . ":?(?:\h+|$)|\b(?!(?:" . $escaped . ")\b)[^\s:]+:/";

$strings = [
    "aaa bbb key1 ccc",
    "aaa bbb key1:xxx key2:",
    "aaa bbb key1:  xxx ccc",
    "aaa bbb key1  :xxx ccc",
    "aaa bbb xxx:yyy zzz",
    "aaa bbb ccc",
    "aaa bbb key1:aaa ccc ddd",
    "aaa bbb key2:aaa key1:bbb",
    "aaa bbb aakey1",
    "aaa bbb key1aa",
    "aaa bbb key1aa"
];

foreach ($strings as $s) {
    preg_match_all($pattern, $s, $matches);
    if (count($matches[0]) > 0) {
        foreach ($matches[0] as $m) {
            echo "Invalid string -->'$m' is invalid format, please check it again..." . PHP_EOL;
        }
    } else {
        echo "Valid string --> '$s'" . PHP_EOL;
    }
}

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6: Invalid string -->'key1 ' is invalid format, please check it again... Invalid string -->'key2:' is invalid format, please check it again... Invalid string -->'key1: ' is invalid format, please check it again... Invalid string -->'key1 ' is invalid format, please check it again... Invalid string -->'xxx:' is invalid format, please check it again... Valid string --> 'aaa bbb ccc' Valid string --> 'aaa bbb key1:aaa ccc ddd' Valid string --> 'aaa bbb key2:aaa key1:bbb' Valid string --> 'aaa bbb aakey1' Valid string --> 'aaa bbb key1aa' Valid string --> 'aaa bbb key1aa'

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99.58 ms | 1356 KiB | 4 Q