在php中获取由`和`加入的作者的姓氏

Question

假设我有一串作者：

$str1="Evans, C. J. and Ebin, Kupper and Nirenberg, Jhon France";
$str2="Evans, C. J.";

如何通过preg_match()获取 first 姓氏？

输出应分别为：

EvansEbinNirenberg
Evans

谢谢！

Answer 1

尝试使用explode()

$str1="Evans, C. J. and Ebin, Kupper and Nirenberg, Jhon France";
$last_names = '';
$s = explode(',', $str1);
foreach($s as $v) {
  $n[] = explode(' ',$v);
}
foreach($n as $ln) {
  $last_names .= end($ln);
}
echo $last_names; //EvansEbinNirenbergFrance 

和preg_match()

$str = 'Evans, C. J. and Ebin, Kupper and Nirenberg, Jhon France';
preg_match_all('/([A-Z])\w+(?=,)/', $str, $matches);
echo implode('',$matches[0]); //EvansEbinNirenberg 

Answer 2

您可以使用：

/([A-Z])\w+(?=,)/g

演示：http://regexr.com/3a9kf

PHP代码：

$str1="Evans, C. J. and Ebin, Kupper and Nirenberg, Jhon France";
$str2="Evans, C. J.";

preg_match_all('/([A-Z])\w+(?=,)/',$str1,$matches);
echo implode('',$matches[0])."\n";

preg_match_all('/([A-Z])\w+(?=,)/',$str2,$matches);
echo implode('',$matches[0]);