How to Extract ID from URL Using Regular Expressions or PHP?

Retrieve ID from URL using Regular Expressions

When working with URLs, extracting specific components like the ID can be crucial. Regular expressions offer a powerful way to tap into these elements. In this instance, we're aiming to capture everything after the last forward slash ("/").

The Regex Formula:

To achieve our goal, we employ the following regular expression:

[^/]+$

How it Works:

• [^/] matches one or more characters that are not forward slashes.
• $ signifies the end of the string, ensuring we capture everything up to that point.

PHP Implementation:

PHP offers an efficient alternative to regular expressions using the strrchr() function:

<code class="php">$id = strrchr("http://spreadsheets.google.com/feeds/spreadsheets/p1f3JYcCu_cb0i0JYuCu123", '/');</code>

Fine-tuning the Result:

However, this approach includes the forward slash in the ID. To remove it, we can use substr():

<code class="php">$id = substr(strrchr("http://spreadsheets.google.com/feeds/spreadsheets/p1f3JYcCu_cb0i0JYuCu123", '/'), 1);</code>

Conclusion:

Both the regular expression and PHP's strrchr() function provide effective ways to extract the desired ID from the URL. Regular expressions offer flexibility, while strrchr() is typically more efficient.

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