使用正则表达式在PHP中命名捕获

Question

How can I use named capture with regex in PHP? Can anyone give me a working example?

Answer 1

Doesn't work with replace , only useful for match in php

$test="yet another test";

preg_match('/(?P<word>t[^s]+)/',$test,$matches);

var_dump($matches['word']);

Answer 2

According documentation

PHP 5.2.2 introduced two alternative syntaxes (?<name>pattern) and (?'name'pattern)

So you'll get same result using:

<?php
preg_match('/(?P<test>.+)/', $string, $matches);  // basic syntax
preg_match('/(?<test>.+)/', $string, $matches);   // alternative
preg_match("/(?'test'.+)/", $string, $matches);   // alternative

Check result on 3v4l.org