PHP strip tags also removing \n

I'm using strip_tags in PHP and after it has processed the string, the string n开发者_Go百科ow also contains no \n's..

Is this standard with strip_tags?

Well, is it so hard to test? :)

class StripTagsTest extends PHPUnit_Framework_TestCase {
    public function testStripTagsShouldNotRemoveLF() {
        $input = "Hello\n <b>World</b>\n";
        $actual = strip_tags($input);
        $expected = "Hello\n World\n";
        $this->assertEquals($expected, $actual);
    }

   public function testStripTagsRemovesBRTagByDefault() {
        $expected = "HelloWorld\n";
        $input = "Hello<br>World<br>\n";
        $actual = strip_tags($input);
        $this->assertEquals($expected, $actual);

        $input = "Hello</br>World</br>\n";
        $actual = strip_tags($input);
        $this->assertEquals($expected, $actual);
    }

    public function testStripTagsCanPermitBRTags() {
        $expected = "Hello<br>World<br>\n";
        $actual = strip_tags($expected, '<br>');
        $this->assertEquals($expected, $actual);

        $expected = "Hello</br>World</br>\n";
        $actual = strip_tags($expected, '<br>');
        $this->assertEquals($expected, $actual);
    }
}

This test will pass. The same result is while using single quotes. So, no, strip_tags doesn't remove \n.

EDIT: Just as already other people here pointed out - strip_tags probably removes <br> tag in your case. Also, next time, if you provide some code, you will get your answer quicker. Added two new tests :)

Strip_tags should not remove \n but maybe it removes <br>.

Try adding a list of tags to permit:

strip_tags('Hello<br>World', '<br>');

this shold allow <br> tags to stay in the string.