php - 在 PHP 变量上重复并输入一个单词

Question

$xcatname = 'Business';
$repeatmaincitiescat = 'London, Paris, New York';

$repeatmaincitiescat = str_replace(',', ' ' . $xcatname . ',', $repeatmaincitiescat).(empty($repeatmaincitiessubcat)?'':"");

以上代码给出了这个结果：伦敦商业、巴黎商业、纽约商业

但是，我想要这种类型的输出，

在伦敦做生意、在巴黎做生意、在纽约做生意

我尝试了一些更改，但结果是错误的。

Answer 1

一个简单的映射呢？

$xcatname = 'Business in %s';
$repeatmaincitiescat = 'London, Paris, New York';
$separator = ', ';
$repeatmaincitiescat = implode(
    $separator,
    array_map(function($v) use ($xcatname) {
            return sprintf($xcatname, $v);
        },
        explode($separator, $repeatmaincitiescat))
);

echo $repeatmaincitiescat;

输出：

Business in London, Business in Paris, Business in New York

这里有一个 PHP 5.2 变体：

$xcatname = 'Business in %s';
$repeatmaincitiescat = 'London, Paris, New York';

$new = new MaskRepeat($repeatmaincitiescat, ', ', $xcatname);
echo $new; # Business in London, Business in Paris, Business in New York

class MaskRepeat {
    private $str;
    public function __construct($string, $separator, $mask) {
        $array = explode($separator, $string);
        foreach($array as &$value) {
            $value = sprintf($mask, $value);
        }
        $this->str = implode($separator, $array);
    }
    public function __toString() {return $this->str;}
}

Answer 2

hakre 提出的替代方案是使用正则表达式。它与您的代码一样接近，您想要实现的目标无法通过简单的替换来完成。

所以，你可以做（​​尽可能接近你所做的）：

<?php
$xcatname = 'Business';
$repeatmaincitiescat = 'London, Paris, New York';

$pattern = '/([^,]+)((,\s*)*)/';

function replace_match($matches) {
    global $xcatname;
    return $xcatname . ' in ' . $matches[1] . $matches[2];
}

$processed = preg_replace_callback($pattern, "replace_match", $repeatmaincitiescat);
// or simpler:
// $processed = preg_replace($pattern, $xcatname . " in  $1$2", $repeatmaincitiescat);
?>

Answer 3

$xcatname = '业务范围'; $repeatmaincitiescat = '伦敦、巴黎、纽约';

$repeatmaincitiescat = "$xcatname ".str_replace(',',','.$xcatname.'', ​​$repeatmaincitiescat).(empty($repeatmaincitiessubcat)?'':"");

echo $repeatmaincitiescat ;