php - 如何只从 PHP 字符串中取出数字？

Question

假设，我有这个字符串:

$string = "Hello! 123 How Are You? 456";

我想将变量 $int 设置为 $int = 123456;

我该怎么做？

示例 2:

$string = "12,456";

必需:

$num = 12456;

谢谢!

Answer 1

正确的变体是:

$string = "Hello! 123 How Are You? 456";
$int = intval(preg_replace('/[^0-9]+/', '', $string), 10);