php preg_replace and newline characters

Asked Dec 05 '18 at 17:59

Active Dec 05 '18 at 17:59

Viewed 25 times

$s = "aaa";
echo preg_replace('/^(.*?)a$/s', "$1_", $s);

$s = "\t\t\t";
echo preg_replace('/^(.*?)\t$/s', "$1_", $s);

$s = "\n\n\n";
echo preg_replace('/^(.*?)\n$/s', "$1_", $s);

The first one prints

aa_

and the second one

\t\t_

But the last one prints

\n_\n

Why?

asked Dec 05 '18 at 17:59

Croco

in preg replace you need to escape your backslashes. Try: `echo preg_replace('/^(.*)?\\n$/s', "$1_", $s)` – richbai90 Dec 05 '18 at 18:02
1

`$` does not match the very end of string. Use `\z`, or add `D` modifier – Wiktor Stribiżew Dec 05 '18 at 18:05

php preg_replace and newline characters

0 Answers0