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@ 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 git.master, git.master_jit, rfc.property-hooks: 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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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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