PHP

Question

我有一个函数可以告诉我字符串中有哪些特殊字符。

我不想剥离它们我想放入另一个变量。

if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $string)) {
    $special_characters = special characters from $string
}

有办法吗？

谢谢

Answer 1

试试这个：

$string = 'sds$%&dd$%&gfhfh';
$string = preg_match_all ('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $string, $result);
$output = '';
foreach($result[0] as $r){

$output .= $r;
}

echo $output;

输出：$%&$%&

见live demo

Answer 2

preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $string, $matches);
var_dump($matches);

Answer 3

您几乎已经掌握了！只需将 "another variable" 添加为匹配参数：

if(preg_match_all('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $string, $special_characters)) {
  print_r($special_characters);
}

请注意 $special_characters 将是一个 array.

因此，对于 $string = "0 is the total cost, which is about 20% of the income.";，您将拥有：

Array
(
    [0] => Array
        (
            [0] => $
            [1] => ,
            [2] => %
        )

)

PHP - 将一个字符串中的特殊字符放入另一个字符串

PHP - Put special characters from a string into another string

preg-match

special-characters