php正则表达式忽略图像url的大小

Question

我如何用PHP中的正则表达式来实现这个

http://www.domain.com/path/to/image/ipsum_image.jpg

匹配此内容并忽略尺寸部分

http://www.domain.com/path/to/image/ipsum_image-300x200.jpg

请记住，300x200可以是任何东西，从4charsx4chars到1charx1chars

Answer 1

$str= "http://www.domain.com/path/to/image/ipsum_image-300x200.jpg";
$regex= '/(\d{1,4})x(\d{1,4}).jpg$/i';
preg_match($regex, $str, $match, PREG_OFFSET_CAPTURE, 3);
print_r($match);

Answer 2

$subject = 'http://www.domain.com/path/to/image/ipsum_image-300x200.jpg';
$result = preg_replace('&(-[0-9]{1,4}x[0-9]{1,4})&is', '', $subject); 
echo $result;