[regex] How to use regex in XPath "contains" function

I would like to match the following text sometext12345_text using the below regex.

I'm using this in one of my selenium tests.

String expr = "//*[contains(@id, 'sometext[0-9]+_text')]";
driver.findElement(By.xpath(expr));

It doesn't seem to work though. Can somebody help?

If you're using Selenium with Firefox you should be able to use EXSLT extensions, and regexp:test()

Does this work for you?

String expr = "//*[regexp:test(@id, 'sometext[0-9]+_text')]";
driver.findElement(By.xpath(expr));

In Robins's answer ends-with is not supported in xpath 1.0 too.. Only starts-with is supported... So if your condition is not very specific..You can Use like this which worked for me

//*[starts-with(@id,'sometext') and contains(@name,'_text')]`\