pcregrep用于在php打开标记之前查找具有额外空间的所有文件

Question

I have a working command line code using pcregrep for finding all PHP with space after closing tag:

pcregrep -rMl '\?>[\s
]+\z' *

I get that here: Find extra space / new line after a closing ?> (php tag)

Now I want to know what is the equivalent command above finding all spaces before PHP opening tag at the beginning of the PHP file:

[SPACE HERE]<?php 

If you know how to do this, please share thanks.

Answer 1

You can try this pattern:

([\s
]+)(?=\<\?php)

You should try escaping < and ? since they have a specific meaning in regex. I prefer look around here since no need to consume the upcoming stuff and grouped the results that comes before PHP tag.

You can skip from the above pattern.

Live demo