php preg_replace，正则表达式

Question

我正在尝试使用 php 和 preg_replace 从 yell.com 中提取邮政编码。我成功提取了邮政编码，但只提取了地址。这是一个例子

$URL = "http://www.yell.com/ucs/UcsSearchAction.do?scrambleSeed=17824062&keywords=shop&layout=&companyName=&location=London&searchType=advance&broaderLocation=&clarifyIndex=0&clarifyOptions=CLOTHES+SHOPS|CLOTHES+SHOPS+-+LADIES|&ooa=&M=&ssm=1&lCOption32=RES|CLOTHES+SHOPS+-+LADIES&bandedclarifyResults=1";
//get yell.com page in a string $htmlContent  = $baseClass->getContent($URL); //get postal code along with the address  $result2 =   preg_match_all("/(.*)</span>/", $htmlContent, $matches);
print_r($matches);

上面的代码输出类似Array ( [0] => Array ( [0] => 7, Royal Parade, Chislehurst, Kent BR7 6NR [1] => 55, Monmouth St, London, WC2H 9DG ....我的问题是我不知道如何只提取没有地址的邮政编码，因为它没有确切的位数(有时它有 6 位数字，有时只有 5 次)。基本上我应该从每个数组中提取最后的 2 个单词. 提前感谢您的帮助!

Answer 1

快速而肮脏:

# your array item
$string = "7, Royal Parade, Chislehurst, Kent BR7 6NR";

# split on spaces
$bits = preg_split('/\s/', $string);

# last two bits
end($bits);
$postcode = prev($bits) . " " . end($bits);

echo $postcode;

查看它在以下位置运行:code pad