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@ 2022-09-13T11:08:18Z

<?php


# https://stackoverflow.com/a/32451875/429071
# Will accept any string along as it _also_ contains a single uppercase or number character
$str = "Has a single uppercase character only.";
$pattern = '/[A-Z0-9]/';
checkStringForPattern($str, $pattern);

# https://stackoverflow.com/a/32451873/429071
# Will accept any string as long as it contains _either_ an uppercase or number character
$str = "WILLACCEPTTHISSTRING";
$pattern = '/^[A-Z0-9]+$/';
checkStringForPattern($str, $pattern);

$str = "0123456789";
$pattern = '/^[A-Z0-9]+$/';
checkStringForPattern($str, $pattern);

# The following regex will need *both* types
$pattern = "/^(?=.*[A-Z])(?=.*[0-9])[A-Z0-9]*$/";

$str = "WILLFAILBECAUSEITONLYCONTAINSLETTERS";
checkStringForPattern($str, $pattern);

$str = "0123456789";
checkStringForPattern($str, $pattern);


function checkStringForPattern($str, $pattern){
    if(preg_match($pattern, $str)){
        var_dump("The [$pattern] pattern accepts the [$str] string.");
     }else{
        var_dump("The [$pattern] does NOT accept the [$str] string.");
    }
}

Output for rfc.property-hooks, git.master, git.master_jit: string(85) "The [/[A-Z0-9]/] pattern accepts the [Has a single uppercase character only.] string." string(70) "The [/^[A-Z0-9]+$/] pattern accepts the [WILLACCEPTTHISSTRING] string." string(60) "The [/^[A-Z0-9]+$/] pattern accepts the [0123456789] string." string(108) "The [/^(?=.*[A-Z])(?=.*[0-9])[A-Z0-9]*$/] does NOT accept the [WILLFAILBECAUSEITONLYCONTAINSLETTERS] string." string(82) "The [/^(?=.*[A-Z])(?=.*[0-9])[A-Z0-9]*$/] does NOT accept the [0123456789] string."

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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