This "preg_replace" not work for me in php 7.4

Question

$regex = array(
                "`^([\t\s]+)`ism"=>'',
                "`^\/\*(.+?)\*\/`ism"=>"",
                "`([\n\A;]+)\/\*(.+?)\*\/`ism"=>"$1",
                "`([\n\A;\s]+)//(.+?)[\n\r]`ism"=>"$1\n",
                "`(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+`ism"=>"\n"
            );
$file_content = preg_replace(array_keys($regex), $regex, $file_content);

I received this warning:

preg_replace(): Compilation failed: escape sequence is invalid in character class at offset 4

score 0 · Answer 1 · answered Nov 29 '20 at 02:54

0

The reason is \A inside square brackets.

Here is a good answer about the reason in general.

PHP PCRE engine migrates to PCRE2

PCRE2 is more strict in the pattern validations, so after the upgrade, some of your existing patterns could not compile anymore.

answered Nov 29 '20 at 02:54

Konstantin Bogomolov

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OK, So what do I need put insted the - "\A" ? – Meir Levi Nov 29 '20 at 11:11
I don't know what was your goal using \A in patterns. Looks like you can just remove it. Or move it outside of square brackets, like this `...(\A|[\n;]+...` – Konstantin Bogomolov Nov 29 '20 at 12:59

This "preg_replace" not work for me in php 7.4

1 Answers1