可讀性較好的正規表達式：regexpbuilderphp

這是PHP移植至 https://github.com/thebinarysearchtree/regexpbuilderjs

RegExpBuilder整合正則表達式至編程語言，從而使它們易于閱讀和維護。正則表達式使用鏈式方法創建。

Examples

use Gherkins\RegExpBuilderPHP;
$builder = new RegExpBuilder();

Validation

$regExp = $builder
    ->startOfInput()
    ->exactly(4)->digits()
    ->then("_")
    ->exactly(2)->digits()
    ->then("_")
    ->min(3)->max(10)->letters()
    ->then(".")
    ->anyOf(array("png", "jpg", "gif"))
    ->endOfInput()
    ->getRegExp();

//true
$regExp->test("2020_10_hund.jpg");
$regExp->test("2030_11_katze.png");
$regExp->test("4000_99_maus.gif");

//false
$regExp->test("123_00_nein.gif");
$regExp->test("4000_0_nein.pdf");
$regExp->test("201505_nein.jpg");

Search

$regExp = $builder
    ->multiLine()
    ->globalMatch()
    ->min(1)->max(10)->anythingBut(" ")
    ->anyOf(array(".pdf", ".doc"))
    ->getRegExp();

$text = <<<EOF
Lorem ipsum dolor sit amet, consetetur sadipscing elitr,
sed diam nonumy SomeFile.pdf eirmod tempor invidunt ut labore et dolore
magna aliquyam erat, sed diam voluptua. At vero eos et accusam
et justo duo dolores et ea rebum. doc_04.pdf Stet clita kasd File.doc.
EOF;

$matches = $regExp->exec($text);

//true
($matches[0] === "SomeFile.pdf");
($matches[1] === "doc_04.pdf");
($matches[2] === "File.doc");