在PHP字符串中正确形式的不定冠词（a，an） [英] Correct form of indefinite article (a, an) in PHP strings

问题描述

有一个简单的方法来替换字符串中的/ an来同意下面的单词 - 与S在日期格式中的工作方式一样？

Is there an easy way to substitute a/an in a string to agree with the following word - much the same as the way 'S' works in Date format?

$apple = 'apple';
$pear = 'pear';
echo "This is a $apple, this is a $pear."

--> This is an apple, this is a pear

推荐答案

：

$l = array('a apple is a fruit', 'a banana is also a fruit');

foreach($l as $s) {
  $s = preg_replace('/(^| )a ([aeiouAEIOU])/', '$1an $2', $s);
  echo $s,"\n";
}

输出：

an apple is a fruit
a banana is also a fruit

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