<p>I have a URL in the format </p> <pre class="brush:php;toolbar:false;">$string ='https://test.com/uploads/2023/02/06/1/18413/themes/2725/images/dvd_jacket_pdf/dvd_jacket_20630 .pdf';</pre> <p>I need to extract 2725, which is a topic ID, in the application. Can I do this in PHP using regular expressions? I think the logic should be to extract the characters between the subject string and //. </p> <pre class="brush:php;toolbar:false;">preg_match('#themes/(.d )#', $string, $check);</pre> <p>I also want to add slashes to this regex. </p>

$string = 'https://test.com/uploads/2023/02/06/1/18413/themes/2725/images/dvd_jacket_pdf/dvd_jacket_20630.pdf';
if(preg_match('#themes/(\d+)#', $string, $check))
    echo $check[1];