Question

As the title says, I am looking for a regex, using php code, that given a $string with line breaks such as the following:

Hello my name is John Doe. Here is a cool video:

embed:http://youtube.com/watch......

I hope you liked it!

It would return:

Hello my name is John Doe. Here is a cool video:

I hope you liked it!

Answer 1

This should do it:

preg_replace('/^embed:.*\s*/m', '', $block_of_text);

Explanation:

1. The /m modifier enabled multi-line mode (so you can easily match line-based patterns)

2. It matches the start of the line using the caret symbol (anchor): ^

3. Matches the "embed: string

4. Matches until the end of the line using .*

5. Matches any newlines and white spaces after the current line (this cleans up the empty lines better)