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@ 2017-12-19T12:19:40Z

<?php

$version = '5.5.58-0ubuntu0.14.04.1';
echo '<pre>';

var_dump(preg_match('/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/', $version, $versionParts));
if (!preg_match('/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/', $version, $versionParts)) {
    echo "RegEx failed on " . $version . PHP_EOL;

} else {
    echo "RegEx extracted version parts" . PHP_EOL;
    var_dump($versionParts);
}

function errorValue($error)
{
    $value = constant($error);
    
    return $value !== null ? $value : $error;
}

$errors = array(
    'PREG_NO_ERROR', 
    'PREG_INTERNAL_ERROR', 
    'PREG_BACKTRACK_LIMIT_ERROR', 
    'PREG_RECURSION_LIMIT_ERROR', 
    'PREG_BAD_UTF8_ERROR', 
    'PREG_BAD_UTF8_OFFSET_ERROR', 
    'PREG_JIT_STACKLIMIT_ERROR'
);

$pregErrors = array_combine(
    array_map('errorValue', $errors),
    $errors
);

echo $pregErrors[preg_last_error()] . PHP_EOL;
echo '</pre>';

Output for git.master, git.master_jit, rfc.property-hooks: <pre>int(1) RegEx extracted version parts array(7) { [0]=> string(6) "5.5.58" ["major"]=> string(1) "5" [1]=> string(1) "5" ["minor"]=> string(1) "5" [2]=> string(1) "5" ["patch"]=> string(2) "58" [3]=> string(2) "58" } PREG_NO_ERROR </pre>

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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